Name
ST_Tile — Gibt Raster, die aus einer Teilungsoperation des Eingaberasters resultieren, mit den gewünschten Dimensionen aus.
Synopsis
setof raster ST_Tile(raster rast, int[] nband, integer width, integer height, boolean padwithnodata=FALSE, double precision nodataval=NULL);
setof raster ST_Tile(raster rast, integer nband, integer width, integer height, boolean padwithnodata=FALSE, double precision nodataval=NULL);
setof raster ST_Tile(raster rast, integer width, integer height, boolean padwithnodata=FALSE, double precision nodataval=NULL);
Beschreibung
Gibt Raster, die aus einer Teilungsoperation des Eingaberasters resultieren, mit den gewünschten Dimensionen aus.
Wenn padwithnodata = FALSE, dann können die Eckkacheln auf der rechten Seite und auf der unteren Seite andere Dimensionen als die übrigen Kacheln aufweisen. Wenn padwithnodata = TRUE, dann haben alle Kacheln dieselbe Dimension und die Eckkacheln werden eventuell mit NODATA Werten aufgefüllt. Wenn für die Rasterbänder keine NODATA Werte festgelegt sind, können Sie diese mit nodataval spezifizieren.
![[Note]](../images/note.png)
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Wenn das Band des Eingaberasters "out-of-db" ist, dann ist das entsprechende Band des Ausgaberasters auch "out-of-db". |
Verfügbarkeit: 2.1.0
Beispiele
WITH foo AS (
SELECT ST_AddBand(ST_AddBand(ST_MakeEmptyRaster(3, 3, 0, 0, 1, -1, 0, 0, 0), 1, '8BUI', 1, 0), 2, '8BUI', 10, 0) AS rast UNION ALL
SELECT ST_AddBand(ST_AddBand(ST_MakeEmptyRaster(3, 3, 3, 0, 1, -1, 0, 0, 0), 1, '8BUI', 2, 0), 2, '8BUI', 20, 0) AS rast UNION ALL
SELECT ST_AddBand(ST_AddBand(ST_MakeEmptyRaster(3, 3, 6, 0, 1, -1, 0, 0, 0), 1, '8BUI', 3, 0), 2, '8BUI', 30, 0) AS rast UNION ALL
SELECT ST_AddBand(ST_AddBand(ST_MakeEmptyRaster(3, 3, 0, -3, 1, -1, 0, 0, 0), 1, '8BUI', 4, 0), 2, '8BUI', 40, 0) AS rast UNION ALL
SELECT ST_AddBand(ST_AddBand(ST_MakeEmptyRaster(3, 3, 3, -3, 1, -1, 0, 0, 0), 1, '8BUI', 5, 0), 2, '8BUI', 50, 0) AS rast UNION ALL
SELECT ST_AddBand(ST_AddBand(ST_MakeEmptyRaster(3, 3, 6, -3, 1, -1, 0, 0, 0), 1, '8BUI', 6, 0), 2, '8BUI', 60, 0) AS rast UNION ALL
SELECT ST_AddBand(ST_AddBand(ST_MakeEmptyRaster(3, 3, 0, -6, 1, -1, 0, 0, 0), 1, '8BUI', 7, 0), 2, '8BUI', 70, 0) AS rast UNION ALL
SELECT ST_AddBand(ST_AddBand(ST_MakeEmptyRaster(3, 3, 3, -6, 1, -1, 0, 0, 0), 1, '8BUI', 8, 0), 2, '8BUI', 80, 0) AS rast UNION ALL
SELECT ST_AddBand(ST_AddBand(ST_MakeEmptyRaster(3, 3, 6, -6, 1, -1, 0, 0, 0), 1, '8BUI', 9, 0), 2, '8BUI', 90, 0) AS rast
), bar AS (
SELECT ST_Union(rast) AS rast FROM foo
), baz AS (
SELECT ST_Tile(rast, 3, 3, TRUE) AS rast FROM bar
)
SELECT
ST_DumpValues(rast)
FROM baz;
st_dumpvalues
------------------------------------------
(1,"{{1,1,1},{1,1,1},{1,1,1}}")
(2,"{{10,10,10},{10,10,10},{10,10,10}}")
(1,"{{2,2,2},{2,2,2},{2,2,2}}")
(2,"{{20,20,20},{20,20,20},{20,20,20}}")
(1,"{{3,3,3},{3,3,3},{3,3,3}}")
(2,"{{30,30,30},{30,30,30},{30,30,30}}")
(1,"{{4,4,4},{4,4,4},{4,4,4}}")
(2,"{{40,40,40},{40,40,40},{40,40,40}}")
(1,"{{5,5,5},{5,5,5},{5,5,5}}")
(2,"{{50,50,50},{50,50,50},{50,50,50}}")
(1,"{{6,6,6},{6,6,6},{6,6,6}}")
(2,"{{60,60,60},{60,60,60},{60,60,60}}")
(1,"{{7,7,7},{7,7,7},{7,7,7}}")
(2,"{{70,70,70},{70,70,70},{70,70,70}}")
(1,"{{8,8,8},{8,8,8},{8,8,8}}")
(2,"{{80,80,80},{80,80,80},{80,80,80}}")
(1,"{{9,9,9},{9,9,9},{9,9,9}}")
(2,"{{90,90,90},{90,90,90},{90,90,90}}")
(18 rows)
WITH foo AS (
SELECT ST_AddBand(ST_AddBand(ST_MakeEmptyRaster(3, 3, 0, 0, 1, -1, 0, 0, 0), 1, '8BUI', 1, 0), 2, '8BUI', 10, 0) AS rast UNION ALL
SELECT ST_AddBand(ST_AddBand(ST_MakeEmptyRaster(3, 3, 3, 0, 1, -1, 0, 0, 0), 1, '8BUI', 2, 0), 2, '8BUI', 20, 0) AS rast UNION ALL
SELECT ST_AddBand(ST_AddBand(ST_MakeEmptyRaster(3, 3, 6, 0, 1, -1, 0, 0, 0), 1, '8BUI', 3, 0), 2, '8BUI', 30, 0) AS rast UNION ALL
SELECT ST_AddBand(ST_AddBand(ST_MakeEmptyRaster(3, 3, 0, -3, 1, -1, 0, 0, 0), 1, '8BUI', 4, 0), 2, '8BUI', 40, 0) AS rast UNION ALL
SELECT ST_AddBand(ST_AddBand(ST_MakeEmptyRaster(3, 3, 3, -3, 1, -1, 0, 0, 0), 1, '8BUI', 5, 0), 2, '8BUI', 50, 0) AS rast UNION ALL
SELECT ST_AddBand(ST_AddBand(ST_MakeEmptyRaster(3, 3, 6, -3, 1, -1, 0, 0, 0), 1, '8BUI', 6, 0), 2, '8BUI', 60, 0) AS rast UNION ALL
SELECT ST_AddBand(ST_AddBand(ST_MakeEmptyRaster(3, 3, 0, -6, 1, -1, 0, 0, 0), 1, '8BUI', 7, 0), 2, '8BUI', 70, 0) AS rast UNION ALL
SELECT ST_AddBand(ST_AddBand(ST_MakeEmptyRaster(3, 3, 3, -6, 1, -1, 0, 0, 0), 1, '8BUI', 8, 0), 2, '8BUI', 80, 0) AS rast UNION ALL
SELECT ST_AddBand(ST_AddBand(ST_MakeEmptyRaster(3, 3, 6, -6, 1, -1, 0, 0, 0), 1, '8BUI', 9, 0), 2, '8BUI', 90, 0) AS rast
), bar AS (
SELECT ST_Union(rast) AS rast FROM foo
), baz AS (
SELECT ST_Tile(rast, 3, 3, 2) AS rast FROM bar
)
SELECT
ST_DumpValues(rast)
FROM baz;
st_dumpvalues
------------------------------------------
(1,"{{10,10,10},{10,10,10},{10,10,10}}")
(1,"{{20,20,20},{20,20,20},{20,20,20}}")
(1,"{{30,30,30},{30,30,30},{30,30,30}}")
(1,"{{40,40,40},{40,40,40},{40,40,40}}")
(1,"{{50,50,50},{50,50,50},{50,50,50}}")
(1,"{{60,60,60},{60,60,60},{60,60,60}}")
(1,"{{70,70,70},{70,70,70},{70,70,70}}")
(1,"{{80,80,80},{80,80,80},{80,80,80}}")
(1,"{{90,90,90},{90,90,90},{90,90,90}}")
(9 rows)