説明

対応するGDALラスタファイルからラスタを返します。gdaldataはbytea型で、GDALラスタファイルの中身です。

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

例

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)
                                

関連情報

ST_AsGDALRaster