Tidal stations collect information on the mean high water line, used in determining the boundaries of sovereign and private ownership.

The Division of State Lands’ Bureau of Survey and Mapping is responsible for maintaining a repository of land records, determining the location of land and water boundaries, protecting the State’s interest in land by clearly delineating and defending the boundaries of state-owned lands and issuing opinions of title and defending the State’s title and ownership interests in property vested in the Board of Trustees of the Internal Improvement Trust Fund (Governor and Cabinet.)

The Bureau of Survey and Mapping protects the boundaries of the State by:

• Performing survey and mapping services for Preservation 2000/Florida Forever and other agency programs;
• Performing reviews for the acquisition and sale of state lands;
• Providing survey and geographic data for the Land Boundary Information System (LABINS);
• Providing water level and meteorological collection and geodetic control data;
• Maintaining a public lands inventory;
• Providing surveys and maps of state owned lands that have not been surveyed or mapped in the past in order to resolve boundary issues;
• Performing identification, restoration and preservation of the controlling corner monuments established during the original cadastral surveys related to the Restoration of Corners Act (F.S. 177 Part III);
• Assisting surveyors in determining the mean high water elevation to meet the requirements of the Coastal Mapping Act (F.S. 177 Part II); and
• Providing liaison and technical assistance through a cooperative agreement between the DEP and the National Ocean Service/National Geodetic Survey and the public.