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Returns an empty raster geometry. Every band in the raster is initialized to 0.0.

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Signatures

RS_MakeEmptyRaster(numBands: Integer, bandDataType: String = 'D', width: Integer, height: Integer, upperleftX: Double, upperleftY: Double, cellSize: Double)

RS_MakeEmptyRaster(numBands: Integer, bandDataType: String = 'D', width: Integer, height: Integer, upperleftX: Double, upperleftY: Double, scaleX: Double, scaleY: Double, skewX: Double, skewY: Double, srid: Integer)

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Parameters

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numBands
Integer
required
The number of bands in the raster. If not specified, the raster will have a single band.
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bandDataType
String
Optional parameter specifying the data types of all the bands in the created raster. Accepts one of:
  1. "D" - 64 bits Double
  2. "F" - 32 bits Float
  3. "I" - 32 bits signed Integer
  4. "S" - 16 bits signed Short
  5. "US" - 16 bits unsigned Short
  6. "B" - 8 bits unsigned Byte
Defaults to 'D'.
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width
Integer
required
The width of the raster in pixels.
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height
Integer
required
The height of the raster in pixels.
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upperleftX
Double
required
The X coordinate of the upper left corner of the raster, in terms of the CRS units.
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upperleftY
Double
required
The Y coordinate of the upper left corner of the raster, in terms of the CRS units.
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cellSize
Double
required
The size of the cells in the raster, in terms of the CRS units. Used with the first signature, which defaults to the Cartesian coordinate system.
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scaleX
Double
required
The scaling factor of the cells on the X axis.
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scaleY
Double
required
The scaling factor of the cells on the Y axis.
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skewX
Double
required
The skew of the raster on the X axis, effectively tilting cells in the horizontal direction.
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skewY
Double
required
The skew of the raster on the Y axis, effectively tilting cells in the vertical direction.
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srid
Integer
required
The SRID of the raster. Use 0 for the default Cartesian coordinate system. Use 4326 for WGS84.
For more information about ScaleX, ScaleY, SkewX, SkewY, please refer to the Affine Transformations section.
If any other value than the accepted values for the bandDataType is provided, RS_MakeEmptyRaster defaults to double as the data type for the raster.

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Return type

The resulting raster.

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Examples

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With 2 bands

SELECT RS_MakeEmptyRaster(2, 10, 10, 0.0, 0.0, 1.0)

+--------------------------------------------+
|rs_makeemptyraster(2, 10, 10, 0.0, 0.0, 1.0)|
+--------------------------------------------+
|                        GridCoverage2D["g...|
+--------------------------------------------+

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With 2 bands and dataType

SELECT RS_MakeEmptyRaster(2, 'I', 10, 10, 0.0, 0.0, 1.0) - Create a raster with integer datatype

+--------------------------------------------+
|rs_makeemptyraster(2, 10, 10, 0.0, 0.0, 1.0)|
+--------------------------------------------+
|                        GridCoverage2D["g...|
+--------------------------------------------+

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With 2 bands, scale, skew, and SRID

SELECT RS_MakeEmptyRaster(2, 10, 10, 0.0, 0.0, 1.0, -1.0, 0.0, 0.0, 4326)

+------------------------------------------------------------------+
|rs_makeemptyraster(2, 10, 10, 0.0, 0.0, 1.0, -1.0, 0.0, 0.0, 4326)|
+------------------------------------------------------------------+
|                                              GridCoverage2D["g...|
+------------------------------------------------------------------+

​
With 2 bands, float dataType, scale, skew, and SRID

SELECT RS_MakeEmptyRaster(2, 'F', 10, 10, 0.0, 0.0, 1.0, -1.0, 0.0, 0.0, 4326) - Create a raster with float datatype

+------------------------------------------------------------------+
|rs_makeemptyraster(2, 10, 10, 0.0, 0.0, 1.0, -1.0, 0.0, 0.0, 4326)|
+------------------------------------------------------------------+
|                                              GridCoverage2D["g...|
+------------------------------------------------------------------+