Land Survey Program
Who We Are and What We Do
The mission of the Land Survey Program is to develop and provide information required for the accurate and economical location of property boundaries in Missouri. The program is responsible for Cadastral and Geodetic Surveys, as well as making survey documents available to surveyors and the public. The corners of the United States Public Land Survey System (USPLSS) are the basis for the location of all property in Missouri. Properly monumented, they are a dependable, consistent, accurate source of information for settling property boundary disputes and other boundary related questions.
The Cadastral Section is responsible for restoring existing and obliterated corners of the United States Public Land Survey System. Hundreds of corners are restored, thousands perpetuated and documented through in-house projects, contracting and participation in the filing of Certified Land Corner Documents.
County Surveyor Co-op
Private Surveyor Co-op
A geodetic survey determines the precise position of permanent points on the earth's surface, taking into account the shape, size and curvature of the earth. Geodetic surveying techniques are applied when areas or distances involved are so great that desired accuracy and precision results cannot be obtained by ordinary or plane surveying. Geodetic measurements are now being done with the use of orbiting satellites that are positioned 12,500 miles above the surface of the earth.
The Geodectic Section defines and manages a consistent coordinate system based on latitude, longitude and heights throughout Missouri. This section is responsible for preservation and augmentation of the horizontal and vertical-control network in Missouri. Electronic distance measurement equipment baselines throughout the state are used to validate and verify these instruments. The Missouri Geographic Reference System (GRS) is an extension of the National Spatial Reference System (NSRS). Currently, there are more than 13,000 of these monuments in Missouri. The technical data for these markers are available through the Land Survey Program.
EDM Baseline Documentation
An Electronic Distance Measuring (EDM) calibration will allow the operator to verify the EDM system constant and scale factor. If the EDM, Prisms, Tribrach are in calibration and the correct atmospheric corrections are applied, the results will be reflected in the returned report. If the system constant and/or the scale factor are not within the prescribed limits, the report will notify the sender. To access the information for an Electronic Distance Measuring (EDM) Calibration Baseline, click the appropriate baseline location on the map below.
The EDM Calibration Baseline application performs a least squares adjustment and statistical analysis on distances observed by the user on a particular calibrated baseline. The user must complete the calibration form for the baseline to be used in the comparison prior to entering the observed distance information into the EDM Baseline Calibration application. The final test results from the EDM Baseline Calibration application will enable the operator to verify that the instrument is calibrated and is operating properly.
EDM Baseline Calibration
Status: Adjustment of the Missouri HARN was completed in March 1998
Geographic Reference System
Go to Geographic Reference System (control map)
How to Report: Report any monuments that may be in danger of destruction to the Program at 573-368-2300.
Records Repository Section
The development of a central repository for all land survey documents began in the early 1970s. The Repository Section now contains approximately two million documents in digital format. Land Survey documents play an extremely important part in the determination of land boundaries. Private land surveyors, title insurers, recorders, attorneys, real estate professionals, and landowners must rely on these documents.
The Repository is responsible for acquiring and archiving survey documents through contact with all county recorders and county surveyors in Missouri. Most of these documents are received digitally or by mail from the counties. The documents are then scanned, indexed, and filmed so they can be accessed through the Land Survey Index (LSI) and made available to the public for immediate download. A duplicate roll of filmed images is stored in the Secretary of State's vault for preservation purposes. These records have proven invaluable, as they have made possible the restoration of county land records where the original documents have been destroyed.