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DEM Data (sdts format) Geocommunity DEM download. ( requires registration ) Mapmart DEM download site. ( requires registration. ) (This site has an easy way to find drg file names) (sdts2dem.exe) - converts SDTS to DEM format. |
Digital Raster Graphics (topo maps) Idaho DRG's Montana DRG's Wyoming DRG's |
( New Windows Version. See DOS version below. )
This program writes a comma or space separated XYZ point file
from DEM files created by the
sdts2dem.exe program.
It only works on coordinate type dems. It doesn't work on dems based on arc seconds.
Open an arc based file with
3DEM
and change projection to UTM. Save file and try again.
This was written to generate comma separated point files for Autocad contour line lisp program
ctl_w8.zip..
Right click Here and "Save Target As" to download Program. <163kb>
( uayor* )
Here's a couple of 30 meter dem files to test out: Dem #1 Dem #2
This is a DOS program. You can only use 8 character file names. It only works out of the current directory.
If you start this in a DOS window, it will change to a full DOS (640 x 480) graphics screen for point selection.
Right click Here and "Save Target As" to download Program. <67 kb>
( uayor* )
( NOTE: This also reads dem files created by 3DEM. )
Right click Here and "Save Target As" to download Program. <67kb>
( uayor* )
Here's a couple of 30 meter dem files to test out: Dem #1 Dem #2
Go to Visualization Page Go to AutoLisp Contour Page