Hi, your problem can be addressed by a 3D terrain making software. There are many available in the market. But one small utility 3DEM, free, can be utilized to do the trick. You can create an roads overlay, a simple geotif file. then load the height data in 3DEM and then apply the geotif overlay and blend them. You may have to try various color combinations to arrive at the correct result.
The Illustrator and other cartographic software etc do not handle relief data so the overlays will be flat. If you have used Microstation then there is a module called MTA or Modular Terrain Analyst which has great capabilities as far as generating drapes are concerned.
However you can try the 3DEM hopefully you will find good results.
Hi everyone -
Long time GISer, brand new Mapublisher/Illustrator-er. I'm creating a map with some nice shaded relief (a DEM + hillshade in ArcMap 9.1), and want to know if there is a way to make the roads layer "drape" over the shaded relief. As it is, I added the roads in Illustrator and they look far too "flat" and out of place. See the attached image and how the roads don't appear to naturally dip down into the valley or rise up onto the ridge.