Digital Map Data Sample

NOTE: These files are a Unix compressed tape archive and cannot be opened until certain steps are completed. The digital files are both tarred and gzipped.

Aransas County Map Sample (JPEG image, 328K)

Following are instructions for opening the digital map "test" files.

1. Click on the desired test file.
2. Choose the option to Save the file to disk and click OK  (Do not select the option to Open the file.)
3. The "File Name" should end with ".tar.gz".  If it does not, rename the file extension and save the file at your appropriate file location.
4. Open File Manager to unzip; save unzipped files.
5. Ready to use with the appropriate GIS software.

	ArcView Shape (.SHP)	ArcInfo Interchange (.E00)
Aransas County All Data Categories	all007shp.tar.gz	all007e00.tar.gz
Aransas County Basemap (roads, water & political boundaries)	basemap007shp.tar.gz	basemap007e00.tar.gz
Aransas County Surveys	surveys007shp.tar.gz	surveys007e00.tar.gz
Aransas County Wells	wells007shp.tar.gz	wells007e00.tar.gz
Aransas County Pipelines	pipes007shp.tar.gz	pipes007e00.tar.gz
Aransas County API Data File	api007.dbf
Well Symbols Font File and ArcView Legend File	av_symb.tar.gz

User Manuals available online (includes data format and dictionary):

• "Digital Map Information", publication OGA094
• "API Well Data File", publication OGA096

Note: The digital data was generated from the Geographic Information System of the Railroad Commission of Texas. Base map information was obtained directly from U.S. Geological Survey 7.5 minute quadrangle maps. Patent Survey lines from Texas General Land Office maps were interpreted as accurately as possible over the U.S. Geological Survey base. Oil and gas well data or pipeline data (if included) was obtained from public records at the Railroad Commission. The information provided by this system is being continually updated and refined. The data is intended solely for the internal use of the Railroad Commission, which makes no claim as to its accuracy or completeness.