Sets the color table for a specified band of a raster object. The color table is provided as a JSON string.
Syntax
raster ST_SetColorTable(raster rast, integer band_sn, cstring clb)Parameters
| Parameter | Description |
|---|---|
rast | The raster object. |
band_sn | The band sequence number, starting from 0. |
clb | The color table in JSON format. For more information, see ST_ColorTable. |
Examples
Set a 4-component (RGBA) color table on band 0:
UPDATE rast
SET rast = ST_SetColorTable(rast, 0,
'{"compsCount": 4,
"entries": [
{"value": 0, "c1": 0, "c2": 0, "c3": 0, "c4": 255},
{"value": 1, "c1": 0, "c2": 0, "c3": 85, "c4": 255},
{"value": 2, "c1": 0, "c2": 0, "c3": 170, "c4": 255}
]
}');Output:
(1 row)See also
ST_ColorTable — Returns the color table of a band as a JSON string.
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