The High Accuracy Reference Network (HARN) map, shows the location of all the survey points in our state that can be used for the purpose of surveying. These monuments have, among other things, an exact location (latitude/longitude) assigned to them.

If you have problems with the links from the Harn Map you can go to and enter the PID yourself.

Show the location of our vertical control networks throughout the state. Each monument has an elevation above mean sea level assigned to it:
County Bench Mark Map

The Highway Surveying Manual presents surveyors' methods and departmental rules that apply to highway surveying operations of the South Dakota State Department of Transportation. This manual is intended to help standardize surveying practices throughout the Department and to be a useful tool for SDDOT survey crews. Updating this manual will be a continuing process and revisions will be issued periodically.

OpenRoads Designer Processing Guidelines
OpenRoads Designer Processing Guidelines

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