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返回 WKT 定义的格式副本。
ST_SpatialRefSys::ST_FormatWKT(definition)
definition
LONG VARCHAR
空间参照系定义文本
LONG VARCHAR 返回 WKT 格式的定义空间参照系的文本字符串。
返回 WKT 空间参照系定义的格式副本。
SQL/MM (ISO/IEC 13249-3: 2006) 服务商扩充
以下示例返回结果 [GEOGCS["WGS 84", DATUM["WGS_1984", SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]], AUTHORITY["EPSG","6326"]], PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]], UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]], AUTHORITY["EPSG","4326"]]]。
GEOGCS["WGS 84", DATUM["WGS_1984", SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]], AUTHORITY["EPSG","6326"]], PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]], UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]], AUTHORITY["EPSG","4326"]]
SELECT ST_SpatialRefSys::ST_FormatWKT('GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]]')
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