Use this dialog box to specify the parameters for exporting a surface to a DGM file.
Selected Surface
- Name
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Displays the name of the selected surface.
- Description
-
Displays the description for the selected surface.
- Drawing Coordinate Zone
-
Displays the drawing coordinate zone, if specified.
Export
- DGM File Name
-
Specifies the file name, location, and file type of your new DGM file. The file can be of type OS (Ordnance Survey) (.dgm) or GEOTIFF (.tiff). Click
to open the Export Surface to DGM dialog box, then browse to the location, enter the file name and select file type. - Export Coordinate Zone
-
Specifies the coordinate zone of the exported surface. If the drawing has a coordinate zone assigned, this coordinate zone is displayed. Click
to open the Select Coordinate System dialog box to select the required coordinate system from the list. - Grid Spacing
-
Specifies the horizontal spacing for the DGM profile points. Enter an integer value that is greater than or equal to 1. This value is specified in units used in the export coordinate zone.
- Determine Levels By
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Specifies how the levels of the DGM file are determined from the exported surface. Select one of the following values:
- Sample surface at grid point: Ensures that for each point along a DGM profile, the level is sampled from the selected surface.
- Average: Ensures that for each point along a DGM profile, the level value corresponds to the mean level in a grid cell-sized region centered at this point.
- Use Custom Null Level
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Specifies whether to use a custom value for null level.
- Null Level
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Specifies the default value for null level.