Change Raster Data Type
Open Table of Contents ToolBox Implementation

Changes the data type of the input raster to the output type specified by the user..

Inputs:

  • Input floating point or integer raster
  • Output raster name and format.
  • Output type.

Output:

  • An raster of the specified data type
    • The NODATA of the output will be
      • The same as the NODATA value of the input if it is within the range of the selected output type
      • Assigned automatically based on the selected output type if the input NODATA value is out of the range of the output data type selected.
    • If the input raster has values that are out of the range of the output data type, these values will be stored as NODATA.

Example: If the input raster is of  floating point type and the output type selected is "Byte"

  • The output raster will have NODATA = 255
  • The output raster will have values only in the cells where the original raster has values between 0 and 254 and these values will be rounded to the closest integer. The rest of the cells will have NODATA value.

Notes:

  • Initially the name of the output raster defines the raster format
    • no extension specified - ESRI binary GRID
    • .img extension (for example raster1.img) - ERDAS IMAGINE image.
    • .tif extension (for example raster1.tif - Tagged Image File Format (TIFF) image.
  • The initial output raster format can be changed by selecting the desired output in the dialog.
  • Currently only file based rasters are supported. Rasters cannot be stored in a GeoDatabase. After you get the desired result, you can export the raster to a GeoDatabase using the standard ArcGIS tools.

ToolBox implementation

Command line syntax

ETS_GPChangeRasterType <Input Raster>  <Out Raster> <Out Type>

Parameters

Expression Explanation
<Input Raster> A Raster dataset or Raster layer
<Out Raster> A String - the full name of the output raster (A raster with the same full name should not exist). The output raster type depends on the extension of the output file(see Notes above)
<Out Type> A String indicating the slope units. Valid inputs "Byte", "Double", "Long", "Short", "Single"

Scripting syntax

ETS_GPChangeRasterType (Input Raster,  Out Raster, Out Type)

See the explanations above:
<> - required parameter
{} - optional parameter

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Copyright: Ianko Tchoukanski