This idea has been discussed before
. IMO elevation data would be a big
help in placing the vehicle on the proper road, in areas
where there are overpasses, underpasses & ramps crossing each other & running in parallel at various levels. It would also allow for some neat 3-D client rendering when the time comes. My only question is, what to do about elevation when the geometry of a road is changed in WME: interpolate the elevations of the new geometry nodes based on existing elevations, until we have actual data from GPS tracks?