Raster Hillshade

Running programmatically

Calculates the shading of a terrain raster based on user defined position of the light source (The Sun). The position of the light source is defined with Azimuth (0 to 360) and Altitude (0 to 90). The combination of the Hillshade overlaid with a semi-transparent elevation raster gives more realistic look of the terrain (see example below). Read more about Hillshade and its importance here.

Inputs:

• Input raster dataset
• Output raster name and format
• Light azimuth (0 to 360)
• Light altitude(0 to 90)

Outputs:

• A floating point raster.

Example:

Source Elevation raster

Result Hillshade raster

Elevation raster (50% transparency) over the Hillshade raster

Notes:

• The input format accepted are file based rasters - ERDAS IMAGINE or Tagged Image File Format (TIFF).
• The .NET ToolBox for ArcGIS Desktop accepts also FileGDB Raster inputs.
• For file based rasters initially the name of the output raster define the raster format:
  • .img extension (for example raster1.img) - ERDAS IMAGINE image.
  • .tif extension (for example raster1.tif - image.
  • The initial output raster format can be changed by selecting the desired output in the dialog.

Running Programmatically

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Parameters

Running the function

ETSPath used in the table below is the full path to ETSRun.exe (E.G. "C:\Program Files\ETSpatial Techniques\ETSurface\ETSRun.exe")

Notes:

• <> - required parameter
• {} - optional parameter
• See examples for Python , .NET or ArcPy

• The argument separator for StartInfo.Arguments is space. If a string might contain a space, you need to double quote it.

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