描述

返回有关栅格对象的基本元数据，如像素大小、旋转（倾斜）、左上角、左下角等。返回的列：upperleftx | upperlefty | width | height | scalex | scaley | skewx | skewy | srid | numbands

示例

SELECT rid, (foo.md).*
 FROM (SELECT rid, ST_MetaData(rast) As md
FROM dummy_rast) As foo;

 rid | upperleftx | upperlefty | width | height | scalex | scaley | skewx | skewy | srid | numbands
 ----+------------+------------+-------+--------+--------+-----------+-------+-------+------+-------
   1 |        0.5 |        0.5 |    10 |     20 |      2 |      3 |     0 |     0 |    0 |        0
   2 | 3427927.75 |    5793244 |     5 |      5 |   0.05 |  -0.05 |     0 |     0 |    0 |        3
                

另请参见

ST_BandMetaData、ST_NumBands