Although a TerraExplorer user can control the display and editing units of several types of parameters, the COM interface always uses the same types of units.
Unit definitions:
§ X, Y Coordinates – The X and Y coordinates should be presented in the same coordinate system that the project’s terrain database uses. For Lat-Long terrains a decimal Lat-Long presentation should be used.
§ Altitude and Height – Altitude and height values should be presented in meters above ground. For 2D primitives you can use meters above the object’s pivot point.
§ Distance – Distances and dimensions of objects should be presented in meters.
§ Speed – Speed should be presented in meters per second.