30 and 10 Meter DEM Source (24K)

[Robert Simmons]

Where do I find 30 and 10 meter USGS DEM sources that are compatible with Pathloss? (1:24000 scale 7.5 minute sources).

I have looked at the USGS web site and everything is using SDTS DEM which are tar'd and gnuzip'd (xxxxxxx.DEM.SDTS.TAR.GZ). These files, when extracted become .ddf files and these are not compatible with PathLoss. The USGS explains that the previous DEM files had coordinate adjustment errors so I don't want to look at old DEM files.

Thank you for your time,
Robert A. Simmons, VP
TCS Consultants, Inc.

[Vic Rhys-Williams]

Try www.micropath.com

Cheers,

Vic R-W

[Robert Simmons]

I think I'll convert it myself for a 1.00 per file / 64.00 per degree block. It's a four step process, but at least I know I'm getting the latest files and the only cost is my time.

Thanks for the reponse.

Robert.

[Roger Boggs]

If you haven't found this already, you need to get this nifty little utility.

SDTS2DEM.exe

http://www.cs.arizona.edu/topovista/sdts2dem/

First you use WinZip to extract all the .ddf files from the xxxxx.tar.gz file,
then you run the SDTS2DEM.exe program (under DOS) to convert it to a xxxx.dem
file. Then, you can go in to the PathLoss Database menu system and do an
ASCII to Binary conversion on the DEM file that you just created. It will convert it
into a file format that it can use - probably a .dta file.

Works on the 10meter files, but I've had no luck with the 30meter files. But, I'm
using Ver 3.0 of PathLoss, not 4.0.

I get all my SDTS files from GISDataDepot

http://www.gisdatadepot.com/catalog/US/sublist.html

[Hossam_El_Meadawy]

I think that the SRTM DEM already solved all these issues.:p