Page Content

Data Use


Decrease text sizeRestore default text sizeIncrease text size  Print this page

The Texas General Land Office uses TCOON data in multiple ways, such as from establishing boundaries, protecting submerged lands, monitoring water conditions and much more. 

TCOON data is used to assist with surveying and leasing state lands by:

  • Accurately locating the three-marine league line, 10.36 miles from the Texas coast, which is the boundary between state and federal waters. The precise location of the boundary aids in calculating the acreage of submerged state tracts leased for mineral exploration, which results in state revenue for the Permanent School Fund.
  • Accurately locating the state's shoreline in order to identify submerged state-owned land for the proper issuance of coastal easements and leases encumbering submerged land.
  • Accurately measuring the shoreline to calculate acreage of submerged state tracts leased for mineral exploration and development. Adjusted acreage may result in new royalty income to the state.
  • Identifying the correct and legal shoreline to aid in the protection of submerged state-owned land from encroachments and illegal activities, such as filling and dredging.
  • Using water level data to establish the accurate boundary between submerged state-owned land and upland private ownership for projects along the Texas coast and in the event of boundary disputes resulting in litigation.

TCOON data is used to assist with coastal resources, including oil spill response, by:

  • Monitoring the highest reach of the water in a high water event to provide justification for the Land Office to impose emergency rules in conjunction with state-regulated Beach and Dune Protection Rules. Emergency rules allow landowners to take emergency measures to restore property after high water or a storm event.
  • Using wave height and direction data to collect accurate water level data to aid in the design of beach nourishment projects. 
  • Using data to aid in the documentation of beach erosion for planning in conjunction with beach protection projects.
  • Creating trajectory and hydrodynamic models to predict oil movements should a spill occur in the Gulf of Mexico or its bays. Using currents, winds, and other information provided by TCOON data, the Land Office can predict where oil spills will likely travel. Oil spill emergency response teams use this information to deploy clean-up teams and other resources to minimize a spill's impact.