Global Mapper supports import and export of LandXML files.

The supported feature types are:

• 3D Points
• TIN Faces
• Contour Lines
• Watershed Areas

The vertical unit is an option attribute in the LandXML format. When no unit is specified, Global Mapper will default to loading the vertical as Meters. The unit interpretation can be controlled from the Layer Options Elevations Tab (Vector Data).

Export LandXML 

The LandXML export is available from the menu File > Export > Export Vector/Lidar Format... and File > Export > Export Elevation Grid Format...

Element Types to Export

Specify the types of features to include in the export. The default selection will be made automatically based on available data.

Contours are line features that have one of the Contour feature types specified.

Watersheds are area features that have Watershed identified as the feature type.

TINs are TIN vector features or gridded elevation/terrain layers. Exporting a terrain surface to LandXML format will generate and export a triangulated network of vector features by sampling the terrain layer(s) at the specified sample spacing.

Elevation Unit

Specify the output vertical unit as feet or meters.

Sample Spacing

When exporting a terrain surface the sample spacing allows the user to set the spacing used to sample the terrain data when generating the exported TIN. The default value is the average of the grid spacings of all the currently loaded elevation overlays.

Interpolate to Fill Small Gaps in Data

Any small areas with missing data will be filled by interpolating the surrounding valid data using an IDW method. This is useful for filling gaps between adjacent tiles or small holes in elevation data.

Save Coordinate System Information in File

Unchecking this option will result in an output file without internal projection information.

Tiling Panel

Export Bounds

Format Updates

Below is a summary of recent updates to LandXML format support.