ST_PixelAsPoint — 返回像素左上角的点几何。
geometry ST_PixelAsPoint(raster rast, integer columnx, integer rowy);
geometry ST_PixelAsPoint(
)
返回像素左上角的点几何。
可用性:2.1.0
SELECT ST_AsText(ST_PixelAsPoint(rast, 1, 1)) FROM dummy_rast WHERE rid = 1; st_astext ---------------- POINT(0.5 0.5)
ST_DumpAsPolygons,ST_PixelAsPolygon,ST_PixelAsPolygons,ST_PixelAsPoints,ST_PixelAsCentroid,ST_PixelAsCentroids