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LCRA Sub-HARN (High Accuracy Reference Network)
Retrieve detailed information about HARN points in the LCRA Service Area.
The LCRA Sub-HARN (High Accuracy Reference Network) is an interactive website to access a network of sub-HARN quality GPS control marks. This survey control is being utilized by private surveyors, city, county and state government agencies to improve positional accuracy of surveyed components.

There are two options for accessing the LCRA HARN points. You can either search by text (by ID, County, Quad) or an interactive map. Please choose your search method below.


NOTE: This application stores data in several different file formats. At a mininum, you need a compression/decompression utility such as WinZip to unzip the initial download. To fully utilize the data you should have Adobe Reader (for pdf documents), Microsoft Excel or compatible (for csv file), and AutoCad R2000 or above (for dwg file). Also, it may be necessary to disable pop-up blockers (Google, Yahoo, MSN, etc.) for the Interactive Map Search to function properly.
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  Search by GPS ID, County, or USGS Quadrangle Name.
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  Use the map to select HARN points by location.
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  Downloads all HARN Points and documents. CAUTION! This is a VERY LARGE download.
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  A link to LCRA FTP Site.
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  A link to NGS GPS data.
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  A link to TxDOT GPS data.
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  A link to Leica SmartNet North America Data Services. Subscribe to this free service where you can access LCRA and other Leica CORS GPS data.
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  A link to LCRA & Leica GPS Data
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  DWG file containing all HARN points.
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