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well-known

WKT（Well-known Text）描述几何类型

| 几何类型 | WKT例子 | 说明 | | | | | | Point | Point (10 10) | 点 | |LineString | LineString ( 10 10, 20 20, 30 40) |有 3 个节点的线 |Polygon | Polygon ((10 10, 10 ......
几何 Well-known 类型 known Text

WKT（Well-known Text）描述坐标系

地理坐标系 GEOGCS["WGS 84", DATUM["World Geodetic System 1984", SPHEROID["WGS 84", 6378137.0, 298.257223563, AUTHORITY["EPSG","7030"]], AUTHORITY["EPSG","6 ......
坐标系 坐标 Well-known known Text
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