ST_PixelWidth — 空間参照系の単位での地理的なピクセルの幅を返します。
double precision ST_PixelWidth(
raster rast)
;
SELECT ST_Width(rast) As rastwidth, ST_PixelWidth(rast) As pixwidth, ST_ScaleX(rast) As scalex, ST_ScaleY(rast) As scaley, ST_SkewX(rast) As skewx, ST_SkewY(rast) As skewy FROM dummy_rast; rastwidth | pixwidth | scalex | scaley | skewx | skewy -----------+----------+--------+--------+-------+---------- 10 | 2 | 2 | 3 | 0 | 0 5 | 0.05 | 0.05 | -0.05 | 0 | 0
SELECT ST_Width(rast) As rastwidth, ST_PixelWidth(rast) As pixwidth, ST_ScaleX(rast) As scalex, ST_ScaleY(rast) As scaley, ST_SkewX(rast) As skewx, ST_SkewY(rast) As skewy FROM (SELECT ST_SetSkew(rast,0.5,0.5) As rast FROM dummy_rast) As skewed; rastwidth | pixwidth | scalex | scaley | skewx | skewy -----------+-------------------+--------+--------+-------+---------- 10 | 2.06155281280883 | 2 | 3 | 0.5 | 0.5 5 | 0.502493781056044 | 0.05 | -0.05 | 0.5 | 0.5