如何判断一个指定的经纬度点是否落在一个多边形区域内?

百度MAP里面的JS代码

//点在多边形内
function ptInPolygon(){
    var pts = [];
    var pt1 = new BMap.Point(116.395, 39.910);
    var pt2 = new BMap.Point(116.394, 39.914);
    var pt3 = new BMap.Point(116.403, 39.920);
    var pt4 = new BMap.Point(116.402, 39.914);
    var pt5 = new BMap.Point(116.410, 39.913);    
    
    pts.push(pt1);
    pts.push(pt2);
    pts.push(pt3);
    pts.push(pt4);
    pts.push(pt5);  
    var ply = new BMap.Polygon(pts);
    
    var pt =new BMap.Point(116.400, 39.914);
    
    var result = BMapLib.GeoUtils.isPointInPolygon(pt, ply);
    if(result == true){
        alert("点在多边形内");
    } else {
        alert("点在多边形外")
    } 
    
    //演示:将面添加到地图上    
    map.clearOverlays();
    var mkr = new BMap.Marker(pt);
    map.addOverlay(mkr);
    map.addOverlay(ply);      
}
    b.isPointInPolygon = function(o, l) {
        if (! (o instanceof BMap.Point) || !(l instanceof BMap.Polygon)) {
            return false
        }
        var k = l.getBounds();
        if (!this.isPointInRect(o, k)) {
            return false
        }
        var t = l.getPath();
        var h = t.length;
        var n = true;
        var j = 0;
        var g = 2e-10;
        var s, q;
        var e = o;
        s = t[0];
        for (var f = 1; f <= h; ++f) {
            if (e.equals(s)) {
                return n
            }
            q = t[f % h];
            if (e.lat < Math.min(s.lat, q.lat) || e.lat > Math.max(s.lat, q.lat)) {
                s = q;
                continue
            }
            if (e.lat > Math.min(s.lat, q.lat) && e.lat < Math.max(s.lat, q.lat)) {
                if (e.lng <= Math.max(s.lng, q.lng)) {
                    if (s.lat == q.lat && e.lng >= Math.min(s.lng, q.lng)) {
                        return n
                    }
                    if (s.lng == q.lng) {
                        if (s.lng == e.lng) {
                            return n
                        } else {++j
                        }
                    } else {
                        var r = (e.lat - s.lat) * (q.lng - s.lng) / (q.lat - s.lat) + s.lng;
                        if (Math.abs(e.lng - r) < g) {
                            return n
                        }
                        if (e.lng < r) {++j
                        }
                    }
                }
            } else {
                if (e.lat == q.lat && e.lng <= q.lng) {
                    var m = t[(f + 1) % h];
                    if (e.lat >= Math.min(s.lat, m.lat) && e.lat <= Math.max(s.lat, m.lat)) {++j
                    } else {
                        j += 2
                    }
                }
            }
            s = q
        }
        if (j % 2 == 0) {
            return false
        } else {
            return true
        }
    };

  

SuperMap.IS.Utility.js 里面找到的代码   

function _RegisterNamespaces() { for (var i = 0; i < arguments.length; i++) { var gv = arguments[i].split("."); var gX = window; for (var j = 0; j < gv.length; j++) { if (!gX[gv[j]]) { gX[gv[j]] = new Object(); } gX = gX[gv[j]]; } } }
_RegisterNamespaces("SuperMap.IS");

//from prototype.js
if (typeof $ != 'function') {
    $ = function() {
        var elements = new Array();
        for (var i = 0; i < arguments.length; i++) {
            var element = arguments[i];
            if (typeof element == 'string') { element = document.getElementById(element); }
            if (arguments.length == 1) { return element; }
            elements.push(element);
        }
        return elements;
    };
}

//from Yahoo! dragdrop_1.0.2.js
function _GetScroll() { var t, l; if (document.documentElement && document.documentElement.scrollTop) { t = document.documentElement.scrollTop; l = document.documentElement.scrollLeft; } else { if (document.body) { t = document.body.scrollTop; l = document.body.scrollLeft; } } return { top: t, left: l }; };
function _GetStyle(el, _95) { if (el.style.styleProp) { return el.style.styleProp; } else { if (el.currentStyle) { return el.currentStyle[_95]; } else { if (document.defaultView) { return document.defaultView.getComputedStyle(el, null).getPropertyValue(_95); } } } };
function _GetScrollTop() { return _GetScroll().top; };
function _GetScrollLeft() { return _GetScroll().left; };
//_AddEvent(element,"mousedown",handleMouseDown)
function _AddEvent(el, eventType, fn, useCapture) { if (eventType.indexOf("on") == 0) { eventType = eventType.substring(2); } useCapture = (useCapture) ? true : false; if (el.addEventListener) { el.addEventListener(eventType, fn, useCapture); } else { if (el.attachEvent) { el.attachEvent("on" + eventType, fn); } else { el["on" + eventType] = fn; } } };
function _RemoveEvent(el, eventType, fn, useCapture) { if (eventType.indexOf("on") == 0) { eventType = eventType.substring(2); } useCapture = (useCapture) ? true : false; if (el.removeEventListener) { el.removeEventListener(eventType, fn, useCapture); } else { if (el.detachEvent) { el.detachEvent("on" + eventType, fn); } else { el["on" + eventType] = null; } } };
function _FixIEEvent(ev) {
    if (typeof ev.charCode == "undefined") { ev.charCode = (ev.type == "keypress") ? ev.keyCode : 0; ev.isChar = (ev.charCode > 0); } if (ev.srcElement && !ev.target) {
        ev.eventPhase = 2; ev.pageX = ev.clientX + _GetScrollLeft(); ev.pageY = ev.clientY + _GetScrollTop();
        if (!ev.preventDefault) { ev.preventDefault = function() { this.returnValue = false; }; } if (ev.type == "mouseout") { ev.relatedTarget = ev.toElement; } else { if (ev.type == "mouseover") { ev.relatedTarget = ev.fromElement; } }
        if (!ev.stopPropagation) { ev.stopPropagation = function() { this.cancelBubble = true; }; } ev.target = ev.srcElement; ev.time = (new Date).getTime();
    } return ev;
};
function _FixDOMEvent(ev) { if (!ev.srcElement) { ev.srcElement = ev.originalTarget; } if (!ev.pageX && ev.clientX && ev.clientY) { ev.pageX = ev.clientX; ev.pageY = ev.clientY; } return ev; };
// 下面这个方法有内存泄漏,暂时弃用。 
//function _GetEvent(e){if(_ygPos.browser=="ie"){ev=_FixIEEvent(window.event);}else{ev=_GetEvent.caller.arguments[0];ev=_FixDOMEvent(_GetEvent.caller.arguments[0]);}return ev;};
//function _GetEvent(e){if(window.event){ev=_FixIEEvent(window.event);}else{ev=_GetEvent.caller.arguments[0];ev=_FixDOMEvent(_GetEvent.caller.arguments[0]);}return ev;};

function _GetEvent(e) { return e ? e : window.event; }
function _CancelBubble(e) { e.cancelBubble = true; }
function _G(e) { e = _GetEvent(e); _CancelBubble(e); return false; }
function _GetMouseX(e) { var posX = 0; if (e.clientX) { if (document.documentElement && document.documentElement.scrollLeft) { posX = e.clientX + document.documentElement.scrollLeft; } else if (document.body) { posX = e.clientX + document.body.scrollLeft; } } return posX; }
function _GetMouseY(e) { var posY = 0; if (e.clientY) { if (document.documentElement && document.documentElement.scrollTop) { posY = e.clientY + document.documentElement.scrollTop; } else if (document.body) { posY = e.clientY + document.body.scrollTop; } } return posY; }
function _GetMouseScrollDelta(e) { if (e.wheelDelta) { return e.wheelDelta; } else if (e.detail) { return -e.detail; } return 0; }
function _GetTarget(e) { if (!e) { e = window.event; } var t = null; if (e.srcElement) { t = e.srcElement; } else if (e.target) { t = e.target; } if (t && t.nodeType) { if (t.nodeType == 3) { t = targ.parentNode; } } return t; }
function _GetElementX(el) { return _GetOffset(el).left; }
function _GetElementY(el) { return _GetOffset(el).top; }
//function _GetElementX(el){return _ygPos.getX(el);}
//function _GetElementY(el){return _ygPos.getY(el);}
function _Floor(d) { return Math.floor(d); } function _Ceil(d) { return Math.ceil(d); } function _Max(d, f) { return Math.max(d, f); } function _Min(d, f) { return Math.min(d, f); } function _Abs(d) { return Math.abs(d); } function _Round(d) { return Math.round(d); } function _AngleToRadian(angle) { return angle * Math.PI / 180.0; } function _RadianToAngle(radian) { return radian * 180.0 / Math.PI; }

// from Yahoo! position_1.0.2.js
var _ygPos = new function() {

    this.getPos = function(oEl) {
        var pos = [oEl.offsetLeft, oEl.offsetTop]; var parent = oEl.offsetParent; var tmp = { x: null, y: null };
        if (parent != oEl) {
            while (parent) {
                switch (browser) {
                    case 'ie':
                        if (_getStyle(parent, 'position') == 'relative' && _getStyle(oEl, 'width') == 'auto' && !(_getStyle(oEl, 'position') != 'static')) { return [oEl.offsetLeft, oEl.offsetTop]; }
                        else if (_getStyle(parent, 'width') != 'auto' || _getStyle(oEl.parentNode, 'position') != 'static') { tmp.x = parseInt(_getStyle(parent, 'borderLeftWidth')); tmp.y = parseInt(_getStyle(parent, 'borderTopWidth')); if (!isNaN(tmp.x)) pos[0] += tmp.x; if (!isNaN(tmp.y)) pos[1] += tmp.y; }
                        break;
                    case 'gecko':
                        if (_getStyle(parent, 'position') == 'relative') { tmp.x = parseInt(_getStyle(parent, 'border-left-width')); tmp.y = parseInt(_getStyle(parent, 'border-top-width')); if (!isNaN(tmp.x)) pos[0] += tmp.x; if (!isNaN(tmp.y)) pos[1] += tmp.y; }
                        break;
                }
                pos[0] += parent.offsetLeft; pos[1] += parent.offsetTop; parent = parent.offsetParent;
            }
        }
        if (browser == 'ie' && _getStyle(oEl, 'width') != 'auto' && _getStyle(oEl.offsetParent, 'width') == 'auto' && _getStyle(oEl.offsetParent, 'position') == 'relative') {
            parent = oEl.parentNode;
            while (parent.tagName != 'HTML') {
                tmp.x = parseInt(_getStyle(parent, 'marginLeft')); tmp.y = parseInt(_getStyle(parent, 'paddingLeft'));
                if (!isNaN(tmp.x)) pos[0] -= tmp.x; if (!isNaN(tmp.y)) pos[0] -= tmp.y;
                parent = parent.parentNode;
            }
        }
        return pos;
    },
    this.getX = function(oEl) { return this.getPos(oEl)[0]; }

    this.getY = function(oEl) { return this.getPos(oEl)[1]; }

    this.setPos = function(oEl, endPos) {
        var offset = [0, 0]; var delta = { x: 0, y: 0 }; var curStylePos = _getStyle(oEl, 'position');
        if (curStylePos == 'static') { oEl.style.position = 'relative'; curStylePos = 'relative'; }
        if (oEl.offsetWidth) {
            if (curStylePos == 'relative') { offset = this.getPos(oEl); var tmp = { x: _getStyle(oEl, 'left'), y: _getStyle(oEl, 'top') }; delta.x = (tmp.x && tmp.x.indexOf('px') != -1) ? parseInt(tmp.x) : 0; delta.y = (tmp.y && tmp.y.indexOf('px') != -1) ? parseInt(tmp.y) : 0; }
            else { offset = this.getPos(oEl.offsetParent); var tmp = { x: _getStyle(oEl, 'margin-left'), y: _getStyle(oEl, 'margin-top') }; delta.x = (tmp.x && tmp.x.indexOf('px') != -1) ? 0 - parseInt(tmp.x) : 0; delta.y = (tmp.y && tmp.y.indexOf('px') != -1) ? 0 - parseInt(tmp.y) : 0; }
        }
        if (browser == 'safari') {
            if (oEl.offsetParent && oEl.offsetParent.tagName == 'BODY') {
                if (_getStyle(oEl, 'position') == 'relative') { delta.x -= document.body.offsetLeft; delta.y -= document.body.offsetTop; }
                else if (_getStyle(oEl, 'position') == 'absolute' || _getStyle(oEl, 'position') == 'fixed') { delta.x += document.body.offsetLeft; delta.y += document.body.offsetTop; }
            }
        }
        if (endPos[0] !== null) oEl.style.left = endPos[0] - offset[0] + delta.x + 'px';
        if (endPos[1] !== null) oEl.style.top = endPos[1] - offset[1] + delta.y + 'px';
    }

    this.setX = function(oEl, x) { this.setPos(oEl, [x, null]); }

    this.setY = function(oEl, y) { this.setPos(oEl, [null, y]); }

    var _getStyle = function(oEl, property) {
        var dv = document.defaultView;
        if (oEl.style[property]) return oEl.style[property];
        else if (oEl.currentStyle) {
            if (property.indexOf('-') != -1) {
                property = property.split('-');
                property[1] = property[1].toUpperCase().charAt(0) + property[1].substr(1);
                property = property.join('');
            }
            if (oEl.currentStyle[property]) return oEl.currentStyle[property];
        }
        else if (dv && dv.getComputedStyle(oEl, '') && dv.getComputedStyle(oEl, '').getPropertyValue(property)) return dv.getComputedStyle(oEl, '').getPropertyValue(property);
        return null;
    }

    var _getBrowser = function() {
        var ua = navigator.userAgent.toLowerCase();
        if (ua.indexOf('opera') != -1) return 'opera';
        else if (ua.indexOf('msie') != -1) return 'ie';
        else if (ua.indexOf('safari') != -1) return 'safari';
        else if (ua.indexOf('gecko') != -1) return 'gecko';
        else return false;
    }

    var browser = _getBrowser();

    this.browser = browser;
};

//Enable VML support
function _EnableVML() {
    if (_ygPos.browser != "ie") { return false; }
    // todo: support ie5.0, ie5.5
    var returnValue = true;
    if (typeof (document.namespaces) == "undefined" || typeof (document.namespaces) == "unknown") {
        return;
    }
    if (document.namespaces && !document.namespaces["v"]) {
        document.namespaces.add("v", "urn:schemas-microsoft-com:vml");
    }
    if (document.styleSheets.length < 1) {
        var _oStyle = document.createElement("style");
        document.body.appendChild(_oStyle);
    }
    if (document.styleSheets.item(0).addRule) {
        try {
            // ie8 标准模式下不支持VML。faint。 
            document.styleSheets.item(0).addRule("v\\:*", "behavior:url(#default#VML); display:inline-block");
        } catch (ex) { returnValue = false; }
    }
    _EnableVML = function() { /*nothing but just return true.*/return returnValue; };
    return returnValue;
}

function _ShowProps(obj, objName) {
    var result = "";
    for (var i in obj) {
        result += objName + "." + i + " = " + obj[i] + "\n";
    }
    return result;
}

function _GetXmlHttpRequest() {
    var xh = null;
    var ie = (navigator.userAgent.toLowerCase().indexOf("msie") != -1);
    if (ie) {
        try { xh = new ActiveXObject("Msxml2.XMLHTTP"); } catch (ex) {
            try { xh = new ActiveXObject("Microsoft.XMLHTTP"); } catch (ex) { xh = null; }
        }
    }
    if (!xh && typeof XMLHttpRequest != "undefined") { xh = new XMLHttpRequest(); }
    return xh;
}

function _ToJSON(o, isEncode) {
    if (o == null)
        return "null";

    switch (o.constructor) {
        case String:
            var s = o; // .encodeURI();
            s = '"' + s.replace(/(["\\])/g, '\\$1') + '"';
            s = s.replace(/\n/g, "\\n");
            s = s.replace(/\r/g, "\\r");
            if (isEncode == true) {
                return encodeURIComponent(s);
            }
            return s;
        case Array:
            var v = [];
            for (var i = 0; i < o.length; i++)
                v.push(_ToJSON(o[i], isEncode));
            return "[" + v.join(", ") + "]";
        case Number:
            return isFinite(o) ? o.toString() : _ToJSON(null);
        case Boolean:
            return o.toString();
        case Date:
            var d = new Object();
            d.__type = "System.DateTime";
            d.Year = o.getUTCFullYear();
            d.Month = o.getUTCMonth() + 1;
            d.Day = o.getUTCDate();
            d.Hour = o.getUTCHours();
            d.Minute = o.getUTCMinutes();
            d.Second = o.getUTCSeconds();
            d.Millisecond = o.getUTCMilliseconds();
            d.TimezoneOffset = o.getTimezoneOffset();
            return _ToJSON(d, isEncode);
        default:
            if (o["toJSON"] != null && typeof o["toJSON"] == "function")
                return o.toJSON();
            if (typeof o == "object") {
                var v = [];
                for (attr in o) {
                    if (typeof o[attr] != "function")
                        v.push('"' + attr + '": ' + _ToJSON(o[attr], isEncode));
                }

                if (v.length > 0)
                    return "{" + v.join(", ") + "}";
                else
                    return "{}";
            }
            return o.toString();
    }
};

function _FromJSON(o, j) {
    if (!j) { return; }
    for (var m in j) {
        if (typeof (o[m]) == "object") {
            _FromJSON(o[m], j[m]);
        }
        else if (typeof (o[m]) != "function" && typeof (o[m]) != "undefined") {
            o[m] = j[m];
        }
    }
};

function _SplitX(points, offsetX) {
    if (typeof (offsetX) == "undefined") { offsetX = 0; }
    var pxs = new Array();
    for (var i = 0; i < points.length / 2; i++) { pxs.push(parseInt(points[2 * i]) + parseInt(offsetX)); }
    return pxs;
}

function _SplitY(points, offsetY) {
    if (typeof (offsetY) == "undefined") { offsetY = 0; }
    var pys = new Array();
    for (var i = 0; i < points.length / 2; i++) { pys.push(parseInt(points[2 * i + 1]) + parseInt(offsetY)); }
    return pys;
}

function _ActionToJSON(type, params) {
    var json = "";
    if (!type) { return; }
    var o = new Object();
    o.type = type;

    if (params) {
        o.params = params;
        if (o.params.length > 0) {
            for (var i = 0; i < o.params.length; i++) {
                if (typeof (o.params[i]) == "function") {
                    //并加一个标识
                    o.params[i] = "*function*:" + _GetFunctionName(o.params[i]);
                }
            }
        }
    }
    json = _ToJSON(o);
    return json;
}

function _JSONToAction(json) {
    var o = eval('(' + json + ')');
    var strParams = "";
    if (o.params) {
        for (var i = 0; i < o.params.length; i++) {
            if (i != 0) {
                strParams += ",";
            }
            if (typeof (o.params[i]) == "string") {
                //是否是function转换来的?
                var index = o.params[i].indexOf("*function*:");
                if (index == 0) {
                    o.params[i] = o.params[i].substring(11);
                    strParams += "eval(o.params[" + i + "])";
                    continue;
                }
            }
            strParams += "o.params[" + i + "]";
        }
    }
    var str = "new " + o.type + "(" + strParams + ")";
    return eval(str);
}

function _GetFunctionName(fun) {
    //只要名称,不要内容
    var funContent = fun.toString();
    var startIndex = funContent.indexOf(" ");
    var endIndex = funContent.indexOf("(");
    return funContent.substring(startIndex + 1, endIndex);
}

function _BackupLayers(_layersBackup, layers) {
    if (_layersBackup) {
        while (_layersBackup.length > 0) {
            var layer = _layersBackup.pop();
            layer.Destroy();
            layer = null;
        }
    }
    if (layers) {
        var count = layers.length;
        if (_layersBackup == null) {
            _layersBackup = new Array();
        }
        for (var i = 0; i < count; i++) {
            if (layers[i]) {
                _layersBackup[i] = new SuperMap.IS.Layer();
                _layersBackup[i].Copy(layers[i]);
            }
            else {
                if (_layersBackup[i]) {
                    _layersBackup[i].Destroy();
                    _layersBackup[i] = null;
                }
            }
        }
    }
}

function _FindDifference(_layersBackup, layers) {
    var changedLayersJSON = "";
    var changedLayers = new Array();
    if (!layers) { return changedLayersJSON; }
    var count = layers.length;
    for (var i = 0; i < count; i++) {
        if (layers[i]) {
            if (!_layersBackup[i]) {
                if (changedLayers.length > 0) { changedLayersJSON = changedLayersJSON + ","; }
                //changedLayers.push(_layers[i]);
                changedLayers[i] = layers[i];
                changedLayersJSON += i.toString();
                continue;
            }
            var o = SMISCompare(_layersBackup[i], layers[i]);
            //          var o=_layersBackup[i].Compare(layers[i]);
            if (o) {
                /*
                if(changedLayers.length>0){changedLayersJSON =changedLayersJSON+",";}
                changedLayersJSON+=i.toString();
                changedLayersJSON+="|";
                if(o.themeRange&&o.themeRange.breakValueIndex)
                {
                changedLayersJSON+=o.themeRange.breakValueIndex;  
                }
                changedLayersJSON+="|";
                if(o.themeRange&&o.themeRange.displaysIndex)
                {
                changedLayersJSON+=o.themeRange.displaysIndex;
                }
                changedLayersJSON+="|";
                if(o.themeGraph&&o.themeGraph.graphStyleIndex)
                {
                changedLayersJSON+=o.themeGraph.graphStyleIndex;
                }
                */
                changedLayers[i] = o;
            }
            else {
                changedLayers[i] = "!@";
            }
        }
        else {
            //layer已被修改为null
            changedLayers[i] = null;
            if (i != 0) { changedLayersJSON = changedLayersJSON + ","; }
            changedLayersJSON += i.toString();
        }
    }
    changedLayersJSON = _ToJSON(changedLayers);
    return changedLayersJSON;
}

//以后如果有了打印控件的脚本,就把这个方法转移过去
function SMISPrintMap(param, mapControlPage, printControlPage, imageHandlerEnabled, map) {
    if (!param || !mapControlPage || !printControlPage) { return false; }
    var mapParam = eval('(' + param.mapParam + ')');
    var queryUrl = param.mapHandler + "common.ashx";
    var mapName = mapParam.mapName;
    var methodName = "GetUrl";

    function onRequestComplete(responseText) {
        if (!responseText) { return; }
        var url = responseText;
        printUrl = printControlPage + "?&Url=" + url + "&MapName=" + mapName + "&MapScale=" + mapParam.mapScale + "&MapControlPage=" + mapControlPage + "&ImageHandlerEnabled=" + imageHandlerEnabled + "&trackingLayerHistoryIndex=" + mapParam.trackingLayerIndex + "&userId=" + mapParam.userID;
        var printWin = window.open(printUrl, "", "resizable,toolbar,menubar,scrollbars,status");
        var hiddenLayers = document.getElementById("hiddenLayersForPrint");
        hiddenLayers.value = _ToJSON(map.layers);
        var hiddenMapParam = document.getElementById("hiddenMapParamForPrint");
        hiddenMapParam.value = _ToJSON(map.GetMapParam())
    };

    var reuqestManager = new SuperMap.IS.RequestManager(queryUrl, onRequestComplete, null);
    reuqestManager.AddQueryString("map", mapName);
    reuqestManager.AddQueryString("method", methodName);
    reuqestManager.AddQueryString("layersKey", param.layersKey);
    reuqestManager.AddQueryString("viewer", param.viewer);
    reuqestManager.AddQueryString("mapCenter", _ToJSON(mapParam.center));
    reuqestManager.AddQueryString("mapScale", mapParam.mapScale);
    reuqestManager.AddQueryString("viewBounds", _ToJSON(mapParam.viewBounds));
    reuqestManager.Send();
    reuqestManager.Destroy();
    reuqestManager = null;

}

function SMISGetMapParam() {
    var hiddenLayers = window.opener.document.getElementById("hiddenLayersForPrint");
    if (hiddenLayers) {
        var hiddenPrintLayers = document.getElementById("hiddenLayersInfo");
        hiddenPrintLayers.value = hiddenLayers.value;
    }

    var hiddenMapParam = window.opener.document.getElementById("hiddenMapParamForPrint");
    if (hiddenMapParam) {
        var hiddenPrintMapParam = document.getElementById("hiddenMapParamInfo");
        hiddenPrintMapParam.value = hiddenMapParam.value;
    }
}

function SMISCompare(object1, object2) {
    //    if(!object1||!object2||typeof(object1)!="object"||typeof(object2)!="object"){return;}
    //    if(object1.constructor!=object2.constructor){return;}
    var newObject = null;
    if (typeof (object1) != "object" && typeof (object1) != "function" && typeof (object2) != "object" && typeof (object2) != "function") {
        if (object1 != object2) {
            newObject = object2;
        }
    }
    else {
        if (object1 == null || object2 == null) {
            newObject = object2;
            return newObject;
        }
        for (var property in object1) {
            if (object2[property] == null) {
                if (object1[property] == null) {
                    continue;
                }
                else {
                    if (!newObject) {
                        newObject = new Object();
                    }
                    newObject[property] = null;
                    continue;
                }
            }
            //还要考虑object1[property] == null的情况
            if (object1[property] == null) {
                //由于上面已经考虑了两者都为null的情况,此处object2[property]必不为null
                if (!newObject) {
                    newObject = new Object();
                }
                newObject[property] = object2[property];
                continue;
            }
            if (object2[property] == object1[property]) {
                continue;
            }
            else {
                if (object2[property].constructor == Array) {
                    var length = object1[property].length > object2[property].length ? object1[property].length : object2[property].length;
                    for (var i = 0; i < length; i++) {
                        var result = SMISCompare(object1[property][i], object2[property][i]);
                        if (result != null) {
                            if (!newObject) {
                                newObject = new Object();
                            }
                            if (!newObject[property]) {
                                newObject[property] = new Array();
                            }
                            newObject[property][i] = result;
                        }
                        else {
                            if (typeof (result) != "undefined") {
                                if (!newObject) {
                                    newObject = new Object();
                                }
                                if (!newObject[property]) {
                                    newObject[property] = new Array();
                                }
                                newObject[property][i] = "!@";
                            }
                        }
                    }
                }
                else if (object2[property].constructor == Function) {
                    continue;
                }
                else {
                    var result = SMISCompare(object1[property], object2[property]);
                    if (result != null) {
                        if (!newObject) {
                            newObject = new Object();
                        }
                        newObject[property] = result;
                    }
                }
            }
        }
    }
    return newObject;
}

function _AdjustCustomMarkPosition(customMarkID, alignStyle) {
    var customMark = document.getElementById(customMarkID);
    var offsetX, offsetY;
    if (customMark) {
        switch (alignStyle) {
            case 0: offsetX = 0; offsetY = 0; break;
            case 1: offsetX = 0; offsetY = customMark.offsetHeight / 2; break;
            case 2: offsetX = 0; offsetY = customMark.offsetHeight; break;
            case 3: offsetX = customMark.offsetWidth / 2; offsetY = 0; break;
            case 4: offsetX = customMark.offsetWidth / 2; offsetY = customMark.offsetHeight / 2; break;
            case 5: offsetX = customMark.offsetWidth / 2; offsetY = customMark.offsetHeight; break;
            case 6: offsetX = customMark.offsetWidth; offsetY = 0; break;
            case 7: offsetX = customMark.offsetWidth; offsetY = customMark.offsetHeight / 2; break;
            case 8: offsetX = customMark.offsetWidth; offsetY = customMark.offsetHeight; break;
            default: offsetX = 0; offsetY = 0; break;
        }
        // 没有必要设置zIndex 
        //customMark.style.zIndex = 1000;
        customMark.style.left = (parseFloat(customMark.style.left) - offsetX) + "px";
        customMark.style.top = (parseFloat(customMark.style.top) - offsetY) + "px";
    }
}

function _CreateMapControl(clientID, centerX, centerY, mapScale, bModifiedByServer, mapHandler, mapName, imageFormat, fixedView, buffer, trackingLayerIndex, userID, writeScalesInfoToScript, antiAlias, disableLogo, tileSize, useImageBuffer, wheelZoomByMouse, tileCheckTime, redirect) {
    var doc = document;
    //    var container = $(clientID);
    var container = doc.getElementById(clientID);
    var params = new Object();
    //    为支持Jquery 等插件的使用
    //    var hiddenLayers = $(clientID + "_hiddenLayers");
    var hiddenLayers = doc.getElementById(clientID + "_hiddenLayers");
    if (hiddenLayers && hiddenLayers.value) {
        var layers = eval(hiddenLayers.value);
        if (layers) {
            params.layers = new Array();
            for (var i = 0; i < layers.length; i++) {
                if (layers[i]) {
                    params.layers[i] = new SuperMap.IS.Layer();
                    params.layers[i].FromJSON(layers[i]);
                }
            }
        }
    }

    //    var hiddenMapParam = $(clientID + "_hiddenMapParam");
    var hiddenMapParam = doc.getElementById(clientID + "_hiddenMapParam");
    if (hiddenMapParam && hiddenMapParam.value) {
        var paramInfo = hiddenMapParam.value;
        var mapParam = eval('(' + paramInfo + ')');
        params.x = mapParam.center.x;
        params.y = mapParam.center.y;
        params.mapScale = mapParam.mapScale;
        if (mapParam.mapBounds) {
            params.mapBounds = new SuperMap.IS.MapRect();
            params.mapBounds.Copy(mapParam.mapBounds);
        }
    }
    else {
        params.x = centerX;
        params.y = centerY;
        params.mapScale = mapScale;
    }
    //    var hiddenWmsLayer = $(clientID + "_hiddenWmsLayers");
    var hiddenWmsLayer = doc.getElementById(clientID + "_hiddenWmsLayers");
    if (hiddenWmsLayer && hiddenWmsLayer.value) {
        var wmsLayersInfo = hiddenWmsLayer.value;
        var wmsLayers = eval('(' + wmsLayersInfo + ')');
    }
    params.bModifiedByServer = bModifiedByServer;   //是否进行了编辑
    params.mapHandler = mapHandler;
    params.mapName = mapName;
    params.imageFormat = imageFormat;
    params.fixedView = fixedView;
    params.buffer = buffer;
    params.trackingLayerIndex = trackingLayerIndex;
    params.userID = userID;
    eval(writeScalesInfoToScript);

    params.antiAlias = antiAlias;
    params.disableLogo = disableLogo;
    params.tileSize = tileSize;
    params.useImageBuffer = useImageBuffer;
    params.wheelZoomByMouse = wheelZoomByMouse;
    params.tileCheckTime = tileCheckTime;
    params.redirect = redirect;
    params.storeClientInfo = true;
    eval(clientID + "=new SuperMap.IS.MapControl(container,params);");

};

function _InitMapControl(clientID) {
    var init = function() {
        eval(clientID + ".Init();");
    }
    return init;
};

function _InitMapControlInternal(clientID) {
    eval(clientID + ".Init()");
}


function _DisposeMapControl(clientID) {
    var destroy = function() {
        eval("if(" + clientID + "){" + clientID + ".Destroy();" + clientID + "=null;}");
    }
    return destroy;
};

function _DisposeMapControlInternal(clientID) {
    eval("if(" + clientID + "){" + clientID + ".Destroy();" + clientID + "=null;}");
};

function _IsInCurrentDomain(url) {
    if (!url) { return true; }
    // 本地文件页面地址,直接返回 true。
    if (document.location.protocol.toLowerCase() == "file:") { return true; }

    var index = url.indexOf("//");
    // 相对路径
    if (index == -1) { return true; }

    var protocol = url.substring(0, index);
    if (document.location.protocol.toLowerCase() != protocol.toLowerCase()) { return false; }

    var subText = url.substring(index + 2); // "//"之后的部分
    var domainWithPortIndex = subText.indexOf("/");
    var domainWithPort = subText.substring(0, domainWithPortIndex);
    var portIndex = domainWithPort.indexOf(":");
    var domain = domainWithPort;
    if (portIndex != -1) {
        domain = domainWithPort.substring(0, portIndex);
    }
    if (domain != document.location.hostname) { return false; }

    var currentPort = document.location.port;
    if (!currentPort || currentPort == "") {
        var currentProtocolLower = document.location.protocol.toLowerCase();
        switch (currentProtocolLower) {
            case "http:": currentPort = 80; break;
            case "https:": currentPort = 443; break;
            case "ftp:": currentPort = 21; break;
            case "file:": currentPort = ""; break;
            default: currentPort = 80; break;
        }
    }

    var port = 80;
    if (portIndex != -1) {
        port = domainWithPort.substring(portIndex + 1);
    } else {
        var protocolLower = protocol.toLowerCase();
        switch (protocolLower) {
            case "http:": port = 80; break;
            case "https:": port = 443; break;
            case "ftp:": port = 21; break;
            case "file:": port = ""; break;
            default: port = 80; break;
        }
    }

    if (port != currentPort) { return false; }
    return true;
}

// 支持 Firebug 形式的控制台调试。 
if (!console) {
    var console = {
        log: function() {
        }
    };
    var cn = ["assert", "count", "debug", "dir", "dirxml", "error", "group", "groupEnd", "info", "profile", "profileEnd", "time", "timeEnd", "trace", "warn",
            "log"];
    var i = 0, tn;
    while ((tn = cn[i++])) {
        if (!console[tn]) {
            (function() {
                var _c = tn + "";
                console[_c] = function() {
                    var a = Array.apply({}, arguments);
                    a.unshift(_c + ":");
                    console.log(a.join(" "));
                };
            })();
        }
    }
};

function isPointInGeometry(position, geometry, tolerance) {
    if (!position || !geometry) { return; }
    if (!tolerance || tolerance < 0) { tolerance = 0; }
    switch (geometry.feature) {
        case SuperMap.IS.FeatureType.point:
            var distance = Math.sqrt(Math.pow(geometry.points[0].x - position.x, 2) + Math.pow(geometry.points[0].y - position.y, 2));
            if (distance <= tolerance) {
                return true;
            }
            break;
        case SuperMap.IS.FeatureType.line:
            for (var i = 0; i < geometry.points.length - 1; i++) {
                var distance = DistPtToLine(geometry.points[i], geometry.points[i + 1], position);
                if (distance > 0 && distance <= tolerance) {
                    return true;
                }
            }
            break;
        case SuperMap.IS.FeatureType.polygon:
            if (IsPointInPolygon(position, geometry)) {
                return true;
            }
            else {
                for (var i = 0; i < geometry.points.length - 1; i++) {
                    var distance = DistPtToLine(geometry.points[i], geometry.points[i + 1], position);
                    if (distance > 0 && distance <= tolerance) {
                        return true;
                    }
                }
                //需要考虑闭合的情况,可能多边形的点最后一个点和第一个点不相等
                {
                    var distance = DistPtToLine(geometry.points[geometry.points.length - 1], geometry.points[0], position);
                    if (distance > 0 && distance <= tolerance) {
                        return true;
                    }
                }
            }
            break;
        default:
            return false;
    }
    return false;
};

function DistPtToLine(pntStart, pntEnd, pntHitTest) {
    var dist = -1;
    if (pntStart.x == pntEnd.x && pntStart.y == pntEnd.y) {
        return -1;
    }

    //判断交点是否在延长线上
    var distanceA = Math.sqrt(Math.pow(pntHitTest.x - pntStart.x, 2) + Math.pow(pntHitTest.y - pntStart.y, 2));
    var distanceB = Math.sqrt(Math.pow(pntHitTest.x - pntEnd.x, 2) + Math.pow(pntHitTest.y - pntEnd.y, 2));
    var distanceC = Math.sqrt(Math.pow(pntStart.x - pntEnd.x, 2) + Math.pow(pntStart.y - pntEnd.y, 2));
    var angleA = Math.acos((distanceB * distanceB + distanceC * distanceC - distanceA * distanceA) / (2 * distanceB * distanceC)) / Math.PI * 180;
    var angleB = Math.acos((distanceA * distanceA + distanceC * distanceC - distanceB * distanceB) / (2 * distanceA * distanceC)) / Math.PI * 180;
    if (angleA >= 90 || angleB >= 90) {
        return distanceA < distanceB ? distanceA : distanceB;
    }
    var pntMiddle = new SuperMap.IS.MapCoord();

    var dDaltaX = pntEnd.x - pntStart.x;
    var dDaltaY = pntStart.y - pntEnd.y;

    var dDaltaX2 = dDaltaX * dDaltaX;
    var dDaltaY2 = dDaltaY * dDaltaY;
    var dDeltaXY = dDaltaX * dDaltaY;

    var dLineSectDist = dDaltaX * dDaltaX + dDaltaY * dDaltaY;

    pntMiddle.x = (dDeltaXY * (pntStart.y - pntHitTest.y) +
                    pntStart.x * dDaltaY2 + pntHitTest.x * dDaltaX2) / dLineSectDist;

    pntMiddle.y = (dDeltaXY * (pntStart.x - pntHitTest.x) +
                    pntStart.y * dDaltaX2 + pntHitTest.y * dDaltaY2) / dLineSectDist;

    dDaltaX = pntHitTest.x - pntMiddle.x;
    dDaltaY = pntHitTest.y - pntMiddle.y;
    dist = Math.pow((dDaltaX * dDaltaX + dDaltaY * dDaltaY), 0.5);
    return dist;
}

function IsPointInPolygon(point, polygon) {
    if (polygon.feature != SuperMap.IS.FeatureType.polygon) {
        return false;
    }

    // 判断是否在bounds内部。
    var bounds = CalcBounds(polygon.points);
    if (point.x < bounds.leftBottom.x || point.x > bounds.rightTop.x || point.y < bounds.leftBottom.y || point.y > bounds.rightTop.y) {
        return false;
    }

    // 判断是否在边线上。
    // 设点为Q,线段为P1P2 ,判断点Q在该线段上的依据是:( Q - P1 ) × ( P2 - P1 ) = 0 且 Q 在以 P1,P2为对角顶点的矩形内。前者保证Q点在直线P1P2上,后者是保证Q点不在线段P1P2的延长线或反向延长线上
    var start = 0;
    var p1;
    var p2;
    var isInLine = false;
    for (var i = 0; i < polygon.parts.length; i++) {
        for (var j = 0; j < polygon.parts[i]; j++) {
            p1 = polygon.points[start + j];
            if (j == polygon.parts[i] - 1) {
                p2 = polygon.points[start];
            }
            else {
                p2 = polygon.points[start + j + 1];
            }

            if (p1.x == p2.x && p1.y == p2.y) {
                continue;
            }

            var cross = (point.x - p1.x) * (p2.y - p1.y) - (point.y - p1.y) * (p2.x - p1.x);
            if (cross == 0) {
                if (point.x <= Math.max(p1.x, p2.x) && point.x >= Math.min(p1.x, p2.x)
                    && point.y <= Math.max(p1.y, p2.y) && point.y >= Math.min(p1.y, p2.y)) {
                    isInLine = true;
                    break;
                }
            }
        }

        if (isInLine) {
            break;
        }

        start += polygon.parts[i];
    }

    if (isInLine) {
        return true;
    }

    start = 0;
    var oddNODES = false;
    for (var p = 0; p < polygon.parts.length; p++) {
        var polySides = polygon.parts[p];
        var polyX = new Array(polySides);
        var polyY = new Array(polySides);
        var x = point.x;
        var y = point.y;
        var j = 0;

        for (var i = 0; i < polySides; i++) {
            polyX[i] = polygon.points[start + i].x;
            polyY[i] = polygon.points[start + i].y;
        }

        for (var i = 0; i < polySides; i++) {
            j++;
            if (j == polySides) {
                j = 0;
            }
            if ((polyY[i] < y && polyY[j] >= y) || (polyY[j] < y && polyY[i] >= y)) {
                if (polyX[i] + (y - polyY[i]) / (polyY[j] - polyY[i]) * (polyX[j] - polyX[i]) < x) {
                    oddNODES = !oddNODES;
                }
            }
        }

        // 已经在某一部分的内部,所以不需要继续判断。
        if (oddNODES) {
            return oddNODES;
        }
        start += polySides;
    }
    return oddNODES;
};

function CalcBounds(points) {
    if (points == null) {
        return null;
    }

    var maxX, minX, maxY, minY;
    maxX = minX = maxY = minY = 0;

    var bounds = new SuperMap.IS.MapRect();

    for (var i = 1; i < points.length; i++) {
        if (points[i] == null) {
            continue;
        }
        if (points[i].x < points[minX].x) {
            minX = i;
        }
        else if (points[i].x > points[maxX].x) {
            maxX = i;
        }
        if (points[i].y < points[minY].y) {
            minY = i;
        }
        else if (points[i].y > points[maxY].y) {
            maxY = i;
        }
    }
    bounds.leftBottom.x = points[minX].x;
    bounds.leftBottom.y = points[minY].y;
    bounds.rightTop.x = points[maxX].x;
    bounds.rightTop.y = points[maxY].y;
    return bounds;
};

SuperMap.IS.RequestManager = function(url, onComplete, onError, userContext) {
    var sender = null;
    if (_IsInCurrentDomain(url)) {
        sender = new SuperMap.IS.XHRSender(url, onComplete, onError, userContext);
    } else {
        sender = new SuperMap.IS.JSONPSender(url, onComplete, onError, userContext);
    }

    function _AddQueryString(key, value) {
        sender.AddQueryString(key, value);
    };

    function _AddQueryStrings(keys, values) {
        sender.AddQueryStrings(keys, values);
    };
    function _Send() {
        sender.Send();
    };
    function _SetTimeout(timeout) {
        sender.SetTimeout(timeout);
    };
    function _Destroy() {
        sender.Destroy();
    };
    this.Send = _Send;
    this.AddQueryString = _AddQueryString;
    this.AddQueryStrings = _AddQueryStrings;
    this.SetTimeout = _SetTimeout;
    this.Destroy = _Destroy;
};

SuperMap.IS.XHRSender = function(url, onComplete, onError, userContext) {
    var _url = url;
    var _queryKeys = null;
    var _queryValues = null;
    var _timeout = 0;
    var _timeoutTimer = null;
    var _requestDone = 0;

    function _AddQueryString(key, value) {
        if (_queryKeys == null) {
            _queryKeys = new Array();
        }
        if (_queryValues == null) {
            _queryValues = new Array();
        }
        _queryKeys.push(key);
        _queryValues.push(encodeURIComponent(value));
    };

    function _AddQueryStrings(keys, values) {
        if (!keys || keys.length <= 0) { return; }
        if (!values || values.length <= 0) { return; }
        if (keys.length != values.length) { return; }
        if (_queryKeys == null) {
            _queryKeys = new Array();
        }
        if (_queryValues == null) {
            _queryValues = new Array();
        }
        for (var i = 0; i < keys.length; i++) {
            _queryKeys.push(keys[i]);
            _queryValues.push(_ToJSON(values[i], true));
        }
    };

    function _Send() {
        var url = _url;
        if (url.indexOf("?") > -1) {
            url += "&";
        } else {
            url += "?";
        }
        url += "t=" + new Date().getTime(); //防止caching
        var xhr = _GetXmlHttpRequest();
        function _TimeoutHandler() {
            if (!_requestDone) {
                _requestDone = 1;
                clearTimeout(_timeoutTimer);
                xhr.onreadystatechange = function() { };
                xhr.abort();
                if (onError) {
                    var timeoutMessage = "Request timed out";
                    //var timeoutMessage = "XMLHttpRequest:Request timed out.(" + _timeout + "s)";
                    onError(timeoutMessage, userContext);
                }
            }
        }
        xhr.open("post", url, true);
        xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
        xhr.onreadystatechange = function() {
            var readyState = xhr.readyState;
            if (readyState == 4) {
                _requestDone = 1;
                var status = xhr.status;
                if (status == 200) {
                    var tempObject = null;
                    if (xhr.responseText != "") {
                        try {
                            tempObject = eval('(' + xhr.responseText + ')');
                        } catch (ex) {
                            tempObject = xhr.responseText;
                        }
                    } else {
                        tempObject = eval(xhr.responseText);
                    }
                    if (tempObject && tempObject.error != null) {
                        if (onError) {
                            onError(tempObject.error, userContext);
                        }
                        xhr.onreadystatechange = function() { };
                        xhr = null;
                        return;
                    }
                    if (onComplete) {
                        onComplete(xhr.responseText, userContext);
                    }
                } else {
                    if (onError) {
                        onError(xhr.responseText, userContext);
                    }
                }
                xhr.onreadystatechange = function() { };
                xhr = null;
            }
        }
        var paramString = null;
        if (_queryKeys && _queryKeys.length > 0) {
            for (var i = 0; i < _queryKeys.length; i++) {
                if (i == 0) {
                    paramString = _queryKeys[i] + "=" + _queryValues[i];
                } else {
                    paramString += "&" + _queryKeys[i] + "=" + _queryValues[i];
                }
            }
        }
        if (_timeout > 0) {
            _timeoutTimer = setTimeout(function() { !_requestDone && _TimeoutHandler(); }, _timeout);
        }
        xhr.send(paramString);
    };

    function _SetTimeout(timeout) {
        _timeout = timeout;
    }

    function _Destroy() {
        if (_queryKeys != null) {
            while (_queryKeys.length > 0) {
                _queryKeys.pop();
            }
            _queryKeys = null;
        }
        if (_queryValues != null) {
            while (_queryValues.length > 0) {
                _queryValues.pop();
            }
            _queryValues = null;
        }
    };
    this.Send = _Send;
    this.AddQueryString = _AddQueryString;
    this.AddQueryStrings = _AddQueryStrings;
    this.SetTimeout = _SetTimeout;
    this.Destroy = _Destroy;
};

var supermap_callbacks = {};
SuperMap.IS.JSONPSender = function(url, onComplete, onError, userContext) {
    var _url = url;
    var _queryKeys = null;
    var _queryValues = null;
    var _splitQuestUrl = null;
    var _uid = null;
    var _limitLength = 1720; //ie:2048,firefox:16000,opera:16000
    var _timeout = 0;
    var _timeoutTimer = null;
    var _requestDone = 0;
    if (navigator.userAgent.indexOf("IE") < 0) {
        //_limitLength = 15900;//iis6
        _limitLength = 1720; //iis7
    }

    function _AddQueryString(key, value) {
        if (_queryKeys == null) {
            _queryKeys = new Array();
        }
        if (_queryValues == null) {
            _queryValues = new Array();
        }
        _queryKeys.push(key);
        //_queryValues.push(escape(value)); //escape时对汉字的处理与encodeURIComponent不一致,方便分割时对‘%’的判断
        _queryValues.push(encodeURIComponent(value)); //使用encodeURIComponent对 “+” 进行处理
    };
    function _AddQueryStrings(keys, values) {
        if (!keys || keys.length <= 0) { return; }
        if (!values || values.length <= 0) { return; }
        if (keys.length != values.length) { return; }
        if (_queryKeys == null) {
            _queryKeys = new Array();
        }
        if (_queryValues == null) {
            _queryValues = new Array();
        }
        for (var i = 0; i < keys.length; i++) {
            _queryKeys.push(keys[i]);
            _queryValues.push(_ToJSON(values[i], true));
        }
    };
    function errorFunction(errorMessage) {
        clearTimeout(_timeoutTimer);
        _requestDone = 1;
        delete supermap_callbacks[_uid];
        for (var i = 0; ; i++) {
            var scriptNode = document.getElementById("_ss_" + _uid + "_" + i);
            if (!scriptNode) { break; }
            _RemoveElement(scriptNode);
            delete scriptNode;
            scriptNode = null;
        }
        if (onError) {
            onError(errorMessage, userContext);
        }
    }
    function _Send() {
        if (_url.length > _limitLength) { return false; }
        var curTime = new Date().getTime();
        //只用时间还不保险,Demo切换地图时就有可能_uid相同,再加上一个4位数的随机码
        var randomNum = Math.floor(Math.random() * 10000);
        _uid = curTime * 10000 + randomNum;
        supermap_callbacks[_uid] = function(json) {
            _requestDone = 1;
            delete supermap_callbacks[_uid];
            for (var i = 0; ; i++) {
                var scriptNode = document.getElementById("_ss_" + _uid + "_" + i);
                if (!scriptNode) { break; }
                _RemoveElement(scriptNode);
                delete scriptNode;
                scriptNode = null;
            }
            var tempObject = null;
            if (json != "") {
                try {
                    tempObject = eval('(' + json + ')');
                } catch (ex) {
                    tempObject = json;
                }
            } else {
                tempObject = eval(json);
            }
            if (tempObject && tempObject.error != null) {
                if (onError) {
                    onError(tempObject.error, userContext);
                }
                return;
            }
            if (onComplete) {
                onComplete(json, userContext);
            }
        };
        _AddQueryString("jsonp", "supermap_callbacks[" + _uid + "]");
        var url = _url;
        //此次url中有多少个key
        var keysCount = 0;
        if (_queryKeys && _queryKeys.length > 0) {
            for (var i = 0; i < _queryKeys.length; i++) {
                if (url.length + _queryKeys[i].length + 2 >= _limitLength)//+2 for ("&"or"?")and"="
                {
                    if (keysCount == 0) { return false; }
                    if (_splitQuestUrl == null) {
                        _splitQuestUrl = new Array();
                    }
                    _splitQuestUrl.push(url);
                    url = _url;
                    keysCount = 0;
                    i--;
                } else {
                    if (url.length + _queryKeys[i].length + 2 + _queryValues[i].length > _limitLength) {
                        var leftValue = _queryValues[i];
                        while (leftValue.length > 0) {
                            var leftLength = _limitLength - url.length - _queryKeys[i].length - 2; //+2 for ("&"or"?")and"="
                            if (url.indexOf("?") > -1) {
                                url += "&";
                            } else {
                                url += "?";
                            }
                            //对leftLength进行微调,不要把编码后的东东分开,e.g:%5D不能被分为%5 和 D
                            var temp = leftValue.substring(0, leftLength);
                            var lastIndex = temp.lastIndexOf('%');
                            if (leftLength >= 5 && leftLength - lastIndex <= 5) {
                                leftLength = lastIndex;
                            }
                            url += _queryKeys[i] + "=" + leftValue.substring(0, leftLength);
                            leftValue = leftValue.substring(leftLength);
                            if (leftValue.length > 0) {
                                if (_splitQuestUrl == null) {
                                    _splitQuestUrl = new Array();
                                }
                                _splitQuestUrl.push(url);
                                url = _url;
                                keysCount = 0;
                            }
                        }
                    } else {
                        keysCount++;
                        if (url.indexOf("?") > -1) {
                            url += "&";
                        } else {
                            url += "?";
                        }
                        url += _queryKeys[i] + "=" + _queryValues[i];
                    }
                }
            }
            if (_splitQuestUrl == null) {
                _splitQuestUrl = new Array();
            }
            _splitQuestUrl.push(url);
        }
        return _SendInternal();
    };
    function _SendInternal() {
        if (!_splitQuestUrl || _splitQuestUrl.length <= 0) { return false; }
        for (var i = 0; i < _splitQuestUrl.length; i++) {
            var url = _splitQuestUrl[i];
            if (url.indexOf("?") > -1) {
                url += "&";
            } else {
                url += "?";
            }
            url += "sectionCount=" + _splitQuestUrl.length;
            url += "&sectionIndex=" + i;
            url += "&jsonpUserID=" + _uid;
            url += "&t=" + new Date().getTime(); //防止caching
            var script = document.createElement("script");
            script.setAttribute("src", url);
            script.setAttribute("type", "text/javascript");
            script.setAttribute("id", "_ss_" + _uid + "_" + i);
            document.body.appendChild(script);
        }
        if (_timeout > 0) {
            var timeoutMessage = "Request timed out";
            //var timeoutMessage = "JSONP:Request timed out.(" + _timeout + "s)";
            _timeoutTimer = setTimeout(function() { !_requestDone && errorFunction(timeoutMessage); }, _timeout);
        }
        return true;
    };

    function _SetTimeout(timeout) {
        _timeout = timeout;
    }

    function _Destroy() {
        if (_queryKeys != null) {
            while (_queryKeys.length > 0) {
                _queryKeys.pop();
            }
            _queryKeys = null;
        }
        if (_queryValues != null) {
            while (_queryValues.length > 0) {
                _queryValues.pop();
            }
            _queryValues = null;
        }
        if (_splitQuestUrl != null) {
            while (_splitQuestUrl.length > 0) {
                _splitQuestUrl.pop();
            }
            _splitQuestUrl = null;
        }
    };
    this.Send = _Send;
    this.AddQueryString = _AddQueryString;
    this.AddQueryStrings = _AddQueryStrings;
    this.SetTimeout = _SetTimeout;
    this.Destroy = _Destroy;

};

function _RemoveElement(element) {
    if (!element || !element.parentNode) { return false; }
    element.parentNode.removeChild(element);
    return true;
}

//from yui_2.6.0 dom.js, Gets the current position of an element based on page coordinates
function _GetOffset(el) {
    var propertyCache = {};
    // regex cache
    var patterns = {
        ROOT_TAG: /^body|html$/i // body for quirks mode, html for standards,
    };
    function getDocumentScrollLeft(doc) {
        doc = doc || document;
        return Math.max(doc.documentElement.scrollLeft, doc.body.scrollLeft);
    }
    function getDocumentScrollTop(doc) {
        doc = doc || document;
        return Math.max(doc.documentElement.scrollTop, doc.body.scrollTop);
    }

    if (document.documentElement.getBoundingClientRect) { // IE
        var box = el.getBoundingClientRect(), round = Math.round;
        var rootNode = el.ownerDocument;
        return pos = { left: round(box.left + getDocumentScrollLeft(rootNode)), top: round(box.top +
                        getDocumentScrollTop(rootNode))
        };
    } else {
        var pos = { left: el.offsetLeft, top: el.offsetTop };
        var parentNode = el.offsetParent;
        // safari: subtract body offsets if el is abs (or any offsetParent), unless body is offsetParent
        var accountForBody = (_ygPos.browser == "safari" && el.offsetParent && el.style.position == "absolute" &&
                        el.offsetParent == el.ownerDocument.body);

        while (parentNode && parentNode != el) {
            if (parentNode.style.position != "static") {
                pos.left += parentNode.clientLeft;
                pos.top += parentNode.clientTop;
            }
            pos.left += parentNode.offsetLeft;
            pos.top += parentNode.offsetTop;
            if (!accountForBody && _ygPos.browser == "safari" && (parentNode.style.position == "absolute" || parentNode.style.position == "relative")) {
                accountForBody = true;
            }
            parentNode = parentNode.offsetParent;
        }

        if (accountForBody) { //safari doubles in this case
            pos.left -= el.ownerDocument.body.offsetLeft;
            pos.top -= el.ownerDocument.body.offsetTop;
        }
        parentNode = el.parentNode;

        // account for any scrolled ancestors
        while (parentNode && parentNode.tagName && !patterns.ROOT_TAG.test(parentNode.tagName)) {
            if (parentNode.scrollTop || parentNode.scrollLeft) {
                pos.left -= parentNode.scrollLeft;
                pos.top -= parentNode.scrollTop;
            }

            parentNode = parentNode.parentNode;
        }

        return pos;
    };
}
来源未知

 

function IsPointInPolygon(point, polygon) {
    if (polygon.feature != SuperMap.IS.FeatureType.polygon) {
        return false;
    }

    // 判断是否在bounds内部。
    var bounds = CalcBounds(polygon.points);
    if (point.x < bounds.leftBottom.x || point.x > bounds.rightTop.x || point.y < bounds.leftBottom.y || point.y > bounds.rightTop.y) {
        return false;
    }

    // 判断是否在边线上。
    // 设点为Q,线段为P1P2 ,判断点Q在该线段上的依据是:( Q - P1 ) × ( P2 - P1 ) = 0 且 Q 在以 P1,P2为对角顶点的矩形内。前者保证Q点在直线P1P2上,后者是保证Q点不在线段P1P2的延长线或反向延长线上
    var start = 0;
    var p1;
    var p2;
    var isInLine = false;
    for (var i = 0; i < polygon.parts.length; i++) {
        for (var j = 0; j < polygon.parts[i]; j++) {
            p1 = polygon.points[start + j];
            if (j == polygon.parts[i] - 1) {
                p2 = polygon.points[start];
            }
            else {
                p2 = polygon.points[start + j + 1];
            }

            if (p1.x == p2.x && p1.y == p2.y) {
                continue;
            }

            var cross = (point.x - p1.x) * (p2.y - p1.y) - (point.y - p1.y) * (p2.x - p1.x);
            if (cross == 0) {
                if (point.x <= Math.max(p1.x, p2.x) && point.x >= Math.min(p1.x, p2.x)
                    && point.y <= Math.max(p1.y, p2.y) && point.y >= Math.min(p1.y, p2.y)) {
                    isInLine = true;
                    break;
                }
            }
        }

        if (isInLine) {
            break;
        }

        start += polygon.parts[i];
    }

    if (isInLine) {
        return true;
    }

    start = 0;
    var oddNODES = false;
    for (var p = 0; p < polygon.parts.length; p++) {
        var polySides = polygon.parts[p];
        var polyX = new Array(polySides);
        var polyY = new Array(polySides);
        var x = point.x;
        var y = point.y;
        var j = 0;

        for (var i = 0; i < polySides; i++) {
            polyX[i] = polygon.points[start + i].x;
            polyY[i] = polygon.points[start + i].y;
        }

        for (var i = 0; i < polySides; i++) {
            j++;
            if (j == polySides) {
                j = 0;
            }
            if ((polyY[i] < y && polyY[j] >= y) || (polyY[j] < y && polyY[i] >= y)) {
                if (polyX[i] + (y - polyY[i]) / (polyY[j] - polyY[i]) * (polyX[j] - polyX[i]) < x) {
                    oddNODES = !oddNODES;
                }
            }
        }

        // 已经在某一部分的内部,所以不需要继续判断。
        if (oddNODES) {
            return oddNODES;
        }
        start += polySides;
    }
    return oddNODES;
};

  

 

 

 

网上找的代码(delphi)

 


Type
  TMyPoint 
= packed record
    X : double;
    Y : double;
  
end;

{*------------------------------------------------------------------------------
  判断指定的经纬度坐标点是否落在指定的多边形区域内
  @param ALon   指定点的经度
  @param ALat   指定点的纬度
  @param APoints   指定多边形区域各个节点坐标
  @return True 落在范围内 False 不在范围内
------------------------------------------------------------------------------*
}
function IsPtInPoly(ALon, ALat: double; APoints: array of TMyPoint): Boolean;
var
  iSum, iCount, iIndex: Integer;
  dLon1, dLon2, dLat1, dLat2, dLon: double;
begin
  Result :
= False;
  
if (Length(APoints) < 3then
  
begin
    Result :
= False;
    Exit;
  
end;
  iSum :
= 0;
  iCount :
= Length(APoints);
  
for iIndex :=0 to iCount - 1 do
  
begin
    
if (iIndex = iCount - 1then
    
begin
      dLon1 :
= APoints[iIndex].X;
      dLat1 :
= APoints[iIndex].Y;
      dLon2 :
= APoints[0].X;
      dLat2 :
= APoints[0].Y;
    
end
    
else
    
begin
      dLon1 :
= APoints[iIndex].X;
      dLat1 :
= APoints[iIndex].Y;
      dLon2 :
= APoints[iIndex + 1].X;
      dLat2 :
= APoints[iIndex + 1].Y;
    
end;
    
if ((ALat >= dLat1) and (ALat < dLat2)) or ((ALat>=dLat2) and (ALat < dLat1)) then
    
begin
      
if (abs(dLat1 - dLat2) > 0then
      
begin
        dLon :
= dLon1 - ((dLon1 -dLon2) * (dLat1 -ALat)) / (dLat1 - dLat2);
        
if (dLon < ALon) then
          Inc(iSum);
      
end;
    
end;

  
end;
  
if (iSum mod 2 <> 0then
    Result :
= True;
end;

网上找的代码2(C#) 

public bool IsPtInPoly(double ALon, double ALat, List<Point> APoints)
        {
            int iSum = 0, iCount;
            double dLon1, dLon2, dLat1, dLat2, dLon;
            if (APoints.Count < 3)
                return false;
            iCount = APoints.Count;
            for (int i = 0; i < iCount - 1; i++)
            {
                if (i == iCount - 1)
                {
                    dLon1 = APoints[i].X;
                    dLat1 = APoints[i].Y;
                    dLon2 = APoints[0].X;
                    dLat2 = APoints[0].Y;
                }
                else
                {
                    dLon1 = APoints[i].X;
                    dLat1 = APoints[i].Y;
                    dLon2 = APoints[i + 1].X;
                    dLat2 = APoints[i + 1].Y;
                }
                //以下语句判断A点是否在边的两端点的水平平行线之间,在则可能有交点,开始判断交点是否在左射线上
                if (((ALat >= dLat1) && (ALat < dLat2)) || ((ALat >= dLat2) && (ALat < dLat1)))
                {
                    if (Math.Abs(dLat1 - dLat2) > 0)
                    {
                        //得到 A点向左射线与边的交点的x坐标:
                        dLon = dLon1 - ((dLon1 - dLon2) * (dLat1 - ALat)) / (dLat1 - dLat2);

                        // 如果交点在A点左侧(说明是做射线与 边的交点),则射线与边的全部交点数加一:
                        if (dLon < ALon)
                            iSum++;
                    }
                }
            }
            if (iSum % 2 != 0)
                return true;
            return false;
        }

 有了这几个参考代码我想写这个判断的代码应该不是什么问题了~

posted on 2014-01-06 13:17  relax  阅读(27330)  评论(1编辑  收藏  举报