© The University of New Mexico, Albuquerque, NM 87131, (505) 277-0111
Data specific to New Mexico, visit the RGIS website
Use 'view' to see a layout of the data. Note that a lot of data is available in both ArcInfo export (.e00) files and as shapefiles. The export files will need to be unzipped, renamed with a .e00 extension and then imported.
really cool website for Digital Elevations Models and lots of information
National Map (formerly USGS Seamless Data Distribution)
for Digital Elevation Models (DEMs), and data formerly on the USGS web site
For 1:250,000 (approximately 100m x 100m) DEM's, download the compressed files that you are interested in (I like to use 'FTP via graphics'). Use Winzip to uncompress the file. In DSH, you may need to change the configuration of Winzip. Select options and configuration, ensure that the checkbox labeled "TAR file smart CR/LF translation" is not checked. From the grid prompt in Arc/INFO, use the DEMGRID function to convert the file into a grid.
For 7.5' (30m x 30m) DEM's, download the compressed files that you are interested in (I like to use 'FTP via graphics'). Use Winzip to uncompress the file. In Winzip, you must have the configuration set properly. Keep the .tar.gz extension. In Winzip, select options and configuration (miscelleneous tab in version 7.0), ensure that the checkbox labeled "TAR file smart CR/LF translation" is not checked. Open the file and a list of .ddf files will appear. Select all the files and "Extract" them. For more detailed information, see the USGS instructions. The next step is converting the SDTS format to Arc/INFO format. If you are not using the 12/98 release of the SDTSIMPORT Arc command, you will not be able to convert the .ddf files. To change the negative cell values around the edge of the grid, use the con function (Grid: newdem = con(75dem > 0, 75dem)
additional USGS websites
EPA has some websites with various data
for gridded values of average rainfall, or average temperature, use the Oregon Climate Service based at Oregon State
you may need to use the ASCIIGRID function depending on the file you download
more climate and weather
more spatial data
following are some sites that have exhaustive data links