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From: http://blog.sina.com.cn/s/blog_53d163eb0100udtv.html 阅读全文
posted @ 2013-08-27 13:31 yushff 阅读(266) 评论(0) 推荐(0) 编辑
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ArcGIS上根据经纬度求地球表面两点间距离的实现以米为单位。.Net2.0，C#实现。 public static double DistanceOfTwoPoints(double lng1,double lat1, double lng2, double lat2, GaussSphere gs) { double radLat1 = Rad(lat1); double radLat2 = Rad(lat2); double a = radLat1 - radLat2; double b = Rad(lng1) - Rad(lng2); double s = 2 * Math.Asi.. 阅读全文
posted @ 2013-08-27 09:49 yushff 阅读(1173) 评论(0) 推荐(0) 编辑
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IPointCollection到 IPolygon的转换 IPoint pPoint = new PointClass(); //IPolygon pPolygon1 = new PolygonClass(); IPointCollection pPointCollection1 = new PolygonClass(); object _missing = Type.Missing; double x, y; for (int i = 0; i < pAllPnts.Count; i++) { x = pAllPnts[i].X; y = pAllPnts[i].Y; pPoint 阅读全文
posted @ 2013-08-15 14:47 yushff 阅读(715) 评论(2) 推荐(1) 编辑
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计算是否通视，如果不通视，返回遮挡点//计算是否通视，如果不通视，返回遮挡点 /// /// 给定点点坐标和文字内容，添加文字 /// /// 通视的起点 /// 通视的终点 /// 第一个遮挡点 public bool Visibility(CoordTransform.Pnt3D tmpFromPnt, CoordTransform.Pnt3D tmpToPnt, ref CoordTransform.Pnt3D tmpIntersectPnt) { IRasterLayer pRasterLayer = pTmpMainWin.pCurrentMap.Map.get_Layer(De.. 阅读全文
posted @ 2013-08-15 14:44 yushff 阅读(642) 评论(3) 推荐(0) 编辑
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//////通过指定的中心点、半径画圆//////要画的圆所在的图层///圆的中心点///半径圆的///图形绘制对象privatevoidDrawCircleByCenterAndRadius(ILayerpLayer,IPointpPoint,doublecircleRadius,IScreenDisplaypScreenDisplay){if(pLayer!=null){ISegmentCollectionpSegmentCollection=null;if(pLayerisIFeatureLayer){IFeatureLayerpFeatureLayer=pLayerasIFeature 阅读全文
posted @ 2013-08-14 23:55 yushff 阅读(1020) 评论(0) 推荐(0) 编辑
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ArcGISDeveloperHelp(Geometry) esriSRGeoCS3Type ConstantsMore available geographic coordinate systems.ConstantValueDescriptionesriSRGeoCS_Albanian19874191Albanian 1987.esriSRGeoCS_Ammassalik19584196Ammassalik 1958.esriSRGeoCS_AutralianAntarctic19984176Autralian Antarctic 1998.esriSRGeoCS_AzoresCentra 阅读全文
posted @ 2013-08-09 01:53 yushff 阅读(445) 评论(0) 推荐(0) 编辑
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ArcGISDeveloperHelp(Geometry) esriSRGeoCS2Type ConstantsMore geographic coordinate systems.ConstantValueDescriptionesriSRGeoCS_S_JTSK_FERRO4818S-JTSK (Ferro).esriSRGeoCS_Estonia1937104101Estonia 1937.esriSRGeoCS_Hermannskogel104102Hermannskogel.esriSRGeoCS_SierraLeone1960104103Sierra Leone 1960.esri 阅读全文
posted @ 2013-08-09 01:52 yushff 阅读(488) 评论(0) 推荐(0) 编辑
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ArcGISDeveloperHelp(Geometry) esriSRGeoCSType ConstantsSee AlsoesriSRGeoCS2Type Constants | esriSRGeoCS3Type ConstantsThe available geographic coordinate systems.ConstantValueDescriptionesriSRGeoCS_Airy18304001Airy 1830.esriSRGeoCS_ModifiedAiry4002Airy modified.esriSRGeoCS_ATS19774122Average Terrest 阅读全文
posted @ 2013-08-09 01:51 yushff 阅读(624) 评论(0) 推荐(0) 编辑
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ArcGISDeveloperHelp(Geometry) esriSRProjCS4Type ConstantsSee AlsoesriSRProjCSType Constants | esriSRProjCS2Type Constants | esriSRProjCS3Type ConstantsMore available projected coordinate systems.ConstantValueDescriptionesriSRProjCS_Abidjan1987_TM_5_NW2165Abidjan 1987 TM 5 NW.esriSRProjCS_Accra_Ghana 阅读全文
posted @ 2013-08-09 01:48 yushff 阅读(947) 评论(0) 推荐(0) 编辑