Extract Raster Grid
A portion of the STM can be extracted to a raster grid format. This format can be displayed with the Raster Manager tool Attach Raster Grid.
From the Edit menu of the STM dialog select Extract Raster Grid.
| Setting | Description |
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Defines the area selection method: Block, Oriented Block, Element, Shape, View |
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If a fence is active it can be used to define the area. |
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Use all attached Scalable Terrain Models during processing. |
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The pixel size for the output raster file. The measure tool can be used to select the pixel size directly from the view. |
Select points to define the area to be extracted based on the area type. The points must be selected in a top view. Any fence or shape should be in the plane of the top view.
The number of points selected will be calculated and a message displayed if the area is too large. In that case select a smaller area.
A dialog is displayed with the raster grid file option.
| Setting | Description |
|---|---|
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Defines the output file format. Supported types are: Erdas IMG, GeoTIFF, Internet TIFF, Internet TIFF 64, TIF (Tag Image File) |
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The color modes are: Integer - 16 bit and Floating Point - 32 bit. |
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File compression if supported by the selected file type. |
Selecting OK will prompt for a saved file location.
The variable STM_ EXTRACTGRID_USESUBRES controls the resolution of the STM that is used. When set to "0", the full resolution is used. When set to "1", a sub resolution is used.