Mapping Technology and Purposes

Brazos County keeps many features in the county as digital files stored in a Geographical Information System (GIS). The GIS includes an array of computer servers, workstations, mapping software, and staff.

Among other things, all roads and bridges that are displayed on our maps are linked to databases that instantaneously calculate length, surface types, value, and location.

If you have a question about your private property information or location please check with the Brazos County Appraisal District Property Search.

Data Collection

Data is acquired by any of the following methods:

  • Digital USGS orthographic photography
  • Field location using Global Positioning System (GPS) hardware and software
  • File sharing relationship between ourselves and the multitude of other local agencies
  • Texas Department of Transportation files


View the county's collection of maps through the GIS Department.

For more information contact GIS Coordinator Megan Lott.


These maps are for general guidelines only. Do not assume that they are 100% correct. Even though the final product is computer-derived, the data has been handled by many people and can be prone to error. Maps are not the law, they are for guidance.  GPS Monumentation

A "GPS monument" is simply a specific place where its exact coordinates have been studied and documented. In the case of the Brazos Valley area, a GPS monument is almost always a half-foot wide hole bored several feet into the ground, filled with concrete, then capped with a small brass disk with a cross hair and its ID number inscribed on the top. It is flush with the ground and can sometimes be difficult to find.

Historically called "Survey Monuments", for many decades these positions of known latitude and longitude have been used by various groups for many purposes. Most often, surveyors use them as a point of reference from which to begin their charts. Quite often, they are used to assist in determining exactly where a new house is being built and how close the construction comes to being within a potentially dangerous floodplain.

Brazos County has completed a collection of benchmarks throughout the county.

Survey Report 2014

If you are interested in finding a specific monument to help with surveying or would simply like to find out more information about any in particular, click here to contact GIS Coordinator Megan Lott.