Map GPS Coordinates - GPS Map Coordinates ... - Global Mapper

Global Mapper User's Manual
3D Vector Display - Advanced Discussion and Options
3D vector data is exaggerated along with the terrain so it will align correctly. A bridge going over a gorge
with heights of 100m and 110m on either end wouldn't match up with the terrain heights of 100m and 110m if
both weren't exaggerated. If relative elevations of 0m and 10m are used, those would end up as 0m and 30m
which would still allow the bridge to match up (NOTE: these values assume a vertical exaggeration value of
3.0).
When extruding to the surface, the default base of the extrusion is set just below the minimum elevation, so
your extruded areas should always extend through the terrain surface.
You can provide additional control over how 3D vector features are rendered by provided attributes for those
features. The supported attributes are as follows:
• 3D_EX_HT - the value of this attribute allows you to override the default extrusion height and
extrude just that height in meters
Map GPS Coordinates - GPS Map Coordinates - GPSCoordinates Map 157