Export Surface To DEM dialog box
Opens via: TINEXPORTTODEM command
The Export Surface To DEM dialog box allows you to export a TIN surface to a DEM file format.
- Select surface
- Format
- Coordinate system
- Grid spacing
- Elevation sampling method
- Use custom no data value
- File name
Select surface
Allows you to choose an available surface from the drop-down list or click the select button (
) to select it from the drawing area.
Format
Allows you to choose the format of the exported DEM file. Several formats are available:
- TIF: GeoTiff
- DEM: USGS Digital Elevation Model
Coordinate system
Displays the coordinate system assigned to the exported surface. Click the three dots on the right side to open the Choose GIS Coordinate System dialog box and select a specific coordinate system from the list.
Grid spacing
Allows you to specify the horizontal spacing for DEM profile points in the units defined by the export coordinate system.
Elevation sampling method
Allows you to choose how each elevation point along a DEM profile is determined by the selected surface.
- Linear interpolation
- The elevation for each point along a DEM profile is sampled from the selected surface.
- Gridding
- The elevation for each point along a DEM profile corresponds to the average elevation in a region the size of one grid cell, centered at that point.
Use custom no data value
Toggles the use of a custom value for null elevation.
When is activated, you can set the Null elevation value.
- Null elevation
- Allows you to specify a custom value for null elevation.
File name
Allows you to choose a file name.
Click the browse button (
) to open the Export As dialog box, where you can indicate a file name.