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 US 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.Field Definitions can be found at: https://rrc.texas.gov/media/kmld3uzj/digital-map-information-user-guide.pdf

The Digital Geologic Map of Big Thicket National Preserve and Vicinity, Texas is composed of GIS data layers complete with ArcMap 9.3 layer (.LYR) files, two ancillary GIS tables, a Map PDF document with ancillary map text, figures and tables, a FGDC metadata record and a 9.3 ArcMap (.MXD) Document that displays the digital map in 9.3 ArcGIS. The data were completed as a component of the Geologic Resources Inventory (GRI) program, a National Park Service (NPS) Inventory and Monitoring (I&M) funded program that is administered by the NPS Geologic Resources Division (GRD). Source geologic maps and data used to complete this GRI digital dataset were provided by the following: Texas Water Development Board and Railroad Commission of Texas. Detailed information concerning the sources used and their contribution the GRI product are listed in the Source Citation sections(s) of this metadata record (bith_metadata.txt; available at http://nrdata.nps.gov/bith/nrdata/geology/gis/bith_metadata.xml). All GIS and ancillary tables were produced as per the NPS GRI Geology-GIS Geodatabase Data Model v. 2.1. (available at: http://science.nature.nps.gov/im/inventory/geology/GeologyGISDataModel.cfm). The GIS data is available as a 9.3 personal geodatabase (bith_geology.mdb), and as shapefile (.SHP) and DBASEIV (.DBF) table files. The GIS data projection is NAD83, UTM Zone 15N. That data is within the area of interest of Big Thicket National Preserve.

This layer is sourced from wwwgisp.rrc.state.tx.us.

Texas Survey System (TXSS) Data for use with GIS mapping software, databases, and web applications are from Caliper Corporation and contain boundaries for Texas RRC Districts, Texas Bay Tracts, and Texas Land Survey Layer.

This layer is a snap shot of the Railroad Commission data at the time of download. For updated data please visit the RRC FTP site.

This layer is sourced from wwwgisp.rrc.state.tx.us.

This layer is sourced from wwwgisp.rrc.state.tx.us.