ST_BandNoDataValue
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Name

ST_BandNoDataValue — Returns the value in a given band that represents no data. If no band num 1 is assumed.

Synopsis

double precision ST_BandNoDataValue(raster rast, integer bandnum=1);

Descrizione

Returns the value that represents no data for the band

Esempi

SELECT ST_BandNoDataValue(rast,1) As bnval1,
    ST_BandNoDataValue(rast,2) As bnval2, ST_BandNoDataValue(rast,3) As bnval3
FROM dummy_rast
WHERE rid = 2;

 bnval1 | bnval2 | bnval3
--------+--------+--------
      0 |      0 |      0

Si veda anche

ST_NumBands