请问webgl前端如何根据返回的要素数据得到其经纬度？
数据集中的信息如下：
|
prjCoordSys.name:
|
Beijing 1954 / 3-degree Gauss-Kruger CM 119E |
|
prjCoordSys.type:
|
PCS_USER_DEFINED |
|
prjCoordSys.distanceUnit:
|
METER |
|
prjCoordSys.coordUnit:
|
METER |
|
projection.name:
|
Transverse_Mercator |
|
projection.type:
|
PRJ_TRANSVERSE_MERCATOR |
|
coordSystem.name:
|
GCS_Beijing_1954 |
|
coordSystem.unit:
|
DEGREE |
|
coordSystem.spatialRefType:
|
SPATIALREF_EARTH_LONGITUDE_LATITUDE |
|
coordSystem.type:
|
GCS_BEIJING_1954 |
|
datum.name:
|
D_Beijing_1954 |
|
datum.type:
|
DATUM_BEIJING_1954 |
|
datum.spheroid.name:
|
Krasovsky_1940 |
|
datum.spheroid.type:
|
SPHEROID_KRASOVSKY_1940 |
