PostGIS
Description
Returns a raster from a supported GDAL raster file. gdaldata is of
type bytea and should be the contents of the GDAL raster file.
If srid is NULL, the function will try to automatically assign the
SRID from the GDAL raster. If srid is provided, the value provided
will override any automatically assigned SRID.
Availability: 2.1.0
Examples
WITH foo AS (
SELECT ST_AsPNG(ST_AddBand(ST_AddBand(ST_AddBand(ST_MakeEmptyRaster(2, 2, 0, 0, 0.1, -0.1, 0, 0, 4326), 1, '8BUI', 1, 0), 2, '8BUI', 2, 0), 3, '8BUI', 3, 0)) AS png
),
bar AS (
SELECT 1 AS rid, ST_FromGDALRaster(png) AS rast FROM foo
UNION ALL
SELECT 2 AS rid, ST_FromGDALRaster(png, 3310) AS rast FROM foo
)
SELECT
rid,
ST_Metadata(rast) AS metadata,
ST_SummaryStats(rast, 1) AS stats1,
ST_SummaryStats(rast, 2) AS stats2,
ST_SummaryStats(rast, 3) AS stats3
FROM bar
ORDER BY rid;
rid | metadata | stats1 | stats2 | stats3
-----+---------------------------+---------------+---------------+----------------
1 | (0,0,2,2,1,-1,0,0,0,3) | (4,4,1,0,1,1) | (4,8,2,0,2,2) | (4,12,3,0,3,3)
2 | (0,0,2,2,1,-1,0,0,3310,3) | (4,4,1,0,1,1) | (4,8,2,0,2,2) | (4,12,3,0,3,3)
(2 rows)