摘要： From http://maps.unomaha.edu:16080/Peterson/gis/notes/MapProjCoord.htmlOutlineMap ProjectionsBasic PrinciplesEarth’s Shape and Vertical DatumsGeographic Coordinate System (latitude and longitude)Map Projections DefinedTypes of Projections.AzimuthalCylindricalConicMathematicalProjection distance, are 阅读全文