ST_SetGeoReference — 通过一次调用设置 6 个地理参考参数。数字之间应使用空格分隔。接受 GDAL 或 ESRI 格式的输入。默认为 GDAL。
raster ST_SetGeoReference(raster rast, text georefcoords, text format=GDAL);
raster ST_SetGeoReference(raster rast, double precision upperleftx, double precision upperlefty, double precision scalex, double precision scaley, double precision skewx, double precision skewy);
通过一次调用设置 6 个地理参考参数。接受 'GDAL' 或 'ESRI' 格式的输入。默认为 GDAL。如果未提供 6 个坐标,则返回 null。
格式表示之间的区别如下
GDAL:
scalex skewy skewx scaley upperleftx upperlefty
ESRI:
scalex skewy skewx scaley upperleftx + scalex*0.5 upperlefty + scaley*0.5
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如果栅格具有外部数据库的波段,更改地理参考可能会导致错误地访问波段的外部存储数据。 |
增强功能:2.1.0 添加 ST_SetGeoReference(raster, double precision, ...) 变体
WITH foo AS (
SELECT ST_MakeEmptyRaster(5, 5, 0, 0, 1, -1, 0, 0, 0) AS rast
)
SELECT
0 AS rid, (ST_Metadata(rast)).*
FROM foo
UNION ALL
SELECT
1, (ST_Metadata(ST_SetGeoReference(rast, '10 0 0 -10 0.1 0.1', 'GDAL'))).*
FROM foo
UNION ALL
SELECT
2, (ST_Metadata(ST_SetGeoReference(rast, '10 0 0 -10 5.1 -4.9', 'ESRI'))).*
FROM foo
UNION ALL
SELECT
3, (ST_Metadata(ST_SetGeoReference(rast, 1, 1, 10, -10, 0.001, 0.001))).*
FROM foo
rid | upperleftx | upperlefty | width | height | scalex | scaley | skewx | skewy | srid | numbands
-----+--------------------+--------------------+-------+--------+--------+--------+-------+-------+------+----------
0 | 0 | 0 | 5 | 5 | 1 | -1 | 0 | 0 | 0 | 0
1 | 0.1 | 0.1 | 5 | 5 | 10 | -10 | 0 | 0 | 0 | 0
2 | 0.0999999999999996 | 0.0999999999999996 | 5 | 5 | 10 | -10 | 0 | 0 | 0 | 0
3 | 1 | 1 | 5 | 5 | 10 | -10 | 0.001 | 0.001 | 0 | 0