Re: contour mapping

--- In CAD_CAM_EDM_DRO@y..., "IMService" <imserv@v...> wrote:

> >Message: 3
> > Date: Fri, 28 Sep 2001 23:51:20 -0000
> > From: npalen@n...
> >Subject: contour mapping
> >
> .
> >Would anyone have knowledge of what it would take to utilize data
> >from the U.S. Geological Survey (URL below) to program the

contours?

> >
>
> Nelson,
>
> Download a copy of StlTrans.

Excerpt from the StlTrans help file:

The USGS can be found on the World Wide Web at
http://edcwww.cr.usgs.gov/. Files are available that contain the map
data and also descriptions of the data contained in the files.


1-degree DEM Files

One of the supported maps is the 1-degree DEM (Digital Elevation
Model) map. The 1-degree DEM is also known as 3-arc second DEM or
1:250,000 scale DEM. An array of elevations are stored in the file
at a regular spaced interval of 90 meters.


A little bit of info to get you going. (Look under the mapping home
page link). I guarantee that there is more about elevation maps than
you will want to know. ;-)

Best Regards,

Fred Smith
IMService