More information about the Caddo Lake Institute is located at the main Caddo Lake Institute Hompage.
This site is the Technical Archive/Data Server.
NOTE: This website contains historic materials assembled and posted by the Caddo Lake Institute, Colorado for programs it managed prior to 2006. These materials, as well as other and later materials selected by the program successor, the Texas non-profit Caddo Lake Institute, can be found on its data server at www.caddolakedata.us
The main website for the Caddo Lake Institute is www.caddolakeinstitute.us
The following is a summary of the digital environmental datalayers compiled and assembled on this Homepage. The electronic media versions of the databases are Arcview shapefiles and Erdas v7.5 (raster data). (With the exception of the scanned and rectified USGS Quad sheets, which are in TIFF World Format.) The files have been compressed using WinZipİ. A shareware version of this program is available at www.winzip.com.
The projection of the various vector layers is Universal Transvers Mercator (UTM), Zone 15. Each vector layer is available in NAD27 (CLARKE 1866) and NAD83 (GRS1980), with the NAD83 version of the layer ending with the number 83. The various raster layers are also in UTM, Zone 15. Each raster layer is only available in NAD27 (CLARKE 1866), with the exception of the scanned and rectified USGS Quad sheets, which are in NAD83 (GRS 1980). The map units for all layers are meters. (Projection Information)
Instructions for adding a datalayer to a view in Arcview v3.x.
The following is a list of the data files & layers on this homepage. Click the hypertext link (underlined) for a brief description of the data file and instructions on how to download data. Be sure to print data description for future use.
1996 Caddo Lake Ramsar Site Map
General Caddo Data
* Note: The link contains tif & tfw files which compose the 6 quad sheets that cover the Caddo Lake area.
Rectified Color Infrared Photography-Frame 1093
Projection: UTM Zone: 15 Units: meters Datum: Nad27 Spheroid: Clarke1866
Projection: UTM Zone: 15 Units: meters Datum: Nad83 Spheroid: GRS1980
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