Coweeta LTER Research Main Page

View Entire DEM Catalog
All DEM's in the Coweeta collection.

Quick Jump to Coweeta Basin 7.5 Minute DEMs
Thirty maps, representing over 1800 square miles surrounding the Coweeta Basin, are part of the Coweeta Basin 7.5 Minute DEM Collection.

What is a DEM?
A digital elevation model (DEM) consists of a raster grid of regularly spaced elevation values that have been primarily derived from USGS topographic map series. 7.5-Minute DEMs correspond to the USGS 1:24,000- and 1:25,000-scale topographic quadrangle maps, and are available for the entire Coweeta regional study area.

Helpful links: USGS DEM Guide | DEM Standards | DEM Abstract

How do I locate maps of my desired location(s)?
If you know the map name, county, or lat/lon coordinates of your study area, then locating your desired maps should be straight-forward, using the View Entire DEM Catalog. All maps are indexed by name, upper left coordinates, county, state, and scale.

What formats does Coweeta LTER offer?
Files are offered in ERDAS IMAGINE .img format, directly readable in both ERDAS IMAGINE and ESRI ArcView or ArcMap software. For users requiring other formats, geotiff format can be made available by contacting Information Management directly.

Are files georeferenced? Yes.
What projection is the data provided in?
All files are provided in Universal Tranverse Mercator (UTM), NAD83, Zone 17.

What is the resolution of the DEMs? 30 meters per pixel.
What scales are available? 1:24,000 (7.5 minute).

What if I need more assistance?
Contact us: Email | Tel. 706.542.5691.

This material is based upon work supported by the National Science Foundation under Cooperative Agreements
(DEB-9632854 & DEB-0218001). Any opinions, findings, conclusions, or recommendations expressed in the material
are those of the authors and do not necessarily reflect the views of the National Science Foundation.