Software, data and services for the
upstream oil and gas industry.


The industry-accepted standard for map data

 

Tobin BLM Survey


The Tobin BLM Digital Survey is a spatial database representing the BLM's digital Public Land Survey System (PLSS). The data is made available to the public from the BLM as the Geographic Coordinate Data Base (GCDB). The BLM collects this information on a township level and has been continually collecting geographic information since 1989. The source data used in their collection process are official BLM survey records and corresponding geodetic control information.

The BLM collection process consists of delineating a township and section land unit grid by determining the geographic location of survey boundaries. An official land description is then assigned to each land unit. GCDB data is made available as ARC/INFO township coverages in an export file format (e00 file). Tobin downloads this data at the township level by state from the GCDB website. This data is then converted, keeping the integrity of the digital survey as a BLM source. The final product Tobin offers is an accurate spatial representation of the BLM’s PLSS.


For a more detailed description of the BLM collection process, visit the BLM’s GCDB website.


Features:

  • Digital product represents the BLM Digital Survey
  • Same structure as the Tobin SuperBase™ Survey
  • Edge matched within the data set by Tobin
  • Provides comparison-background to Tobin SuperBase™ Survey
  • Data Set includes polygons, attributes and annotations for meridians, township, range and sections

Benefits:

  • The definitive data set to compare federal surveying efforts with the oil and gas industry standard, Tobin SuperBase™ Landgrid
  • Differences with Tobin SuperBase™ can alert users that additional title work may be required
  • Since the data is digital and includes a database of attributed data it can be formatted for users of GIS, mapping and/or CAD applications
  • Data is updated quarterly

Coverage:

  • Arizona
  • California
  • Colorado
  • Idaho
  • Montana
  • Nevada
  • New Mexico
  • North Dakota
  • Oregon
  • Utah
  • Washington
  • Wyoming

Tobin Map Data BLM Coverage

BLM Limit of Liability:

The BLM has stated that the geographic coordinates of this data set have no legal significance and should not be used as a substitute for a legal boundary survey. The BLM also states that this digital survey can be used for record keeping, mapping and planning purposes. The Tobin BLM Digital Survey product, which was created from the BLM's data set, is a useful tool that can be used as reference for determining PLSS boundaries as how the BLM delineates them.