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View Full Version : Help needed to find terrain map of california



jtw29
03-16-2007, 01:13 PM
I've been searching the net for a couple of hours looking for a good extremely detailed terrain map of california for a flyover in LW. I've found good data from the USGS but it needs to be assembled and such... Does anyone have a link to a place where I can find a finished bump/displacement map of california or even a detailed model with the elevation already applied? Thanks!

MicroMouse
03-16-2007, 02:11 PM
I don't know of a source for a ready made bump or displacement map.

There are many types of DEM (Digital Elevation Map) files and I don't know what you have.

If you are on a PC, you could use
AccuTrans 3D from http://www.micromouse.ca/
to convert the DEM file to a LWO object. You can
- save out sections from a landscape
- add UV coordinates for texture mapping.
- save at lower resolutions for fly-overs

If the DEM file is a type that can not be read by AccuTrans use

- MicroDEM from http://www.usna.edu/Users/oceano/pguth/website/microdem.htm

- 3DEM from
http://www.visualizationsoftware.com/3dem.html

to convert to a USGS ASCII 1 degree DEM file which AccuTrans can read.

3DEM will also combine adjacent DEM files into a larger file.

Wayne

Lightwolf
03-16-2007, 03:16 PM
This might help: http://www.geotorrent.org/details.php?id=51

But you'd need infiniMap to load it (the free version will do if you planar map it and use the shader only).

It is likely to need some heavy processing, I haven't actually downloaded and seen it yet so I can't say anything about the quality. (you'll need a bittorrent client to get it).

Cheers,
Mike

Lamont
03-16-2007, 07:34 PM
It's a lot of data. I have torrey pines golf course and it's at 1/2 rez @ 2.5GB. It will come in chunks and you'd have to geo-ref the images to match the data.