Aliquot Parts to GPS Calculator

Enter a PLSS aliquot-part legal description (Meridian, Township, Range, Section, Quarter) and get the GPS coordinates of any corner of that parcel, pulled from BLM's official PLSS CadNSDI survey database — not idealized geometry.

Legal Description

Read top to bottom in the same order as the description: e.g. "S2, NW4, NE4" = 1st Half S, 2nd Quarter-of-Quarter NW, 3rd Quarter of Section NE.

Result

Description
Latitude
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Longitude
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DMS
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A claim can span more than one section — calculate each aliquot part above, then click "Add This Parcel to Claim" for each one. They'll all export together, labeled under one claim name, in the panel below.
All four corners + center of this parcel
PointLatitudeLongitude
Raw BLM parcel record 

    


    

  


  

  

    
How this works & accuracy notes

    

      
Data source. Coordinates come live from the BLM's official PLSS CadNSDI survey database (the same authoritative dataset used by BLM's own PLSS web viewer), not from idealized 1-mile-square section math. Real sections are irregular — convergence, historical survey error, and terrain closures mean corners rarely fall exactly where simple geometry would predict. This tool queries the actual surveyed/GCDB boundary for your aliquot part and reads real corner vertices from it.

      
Accuracy. BLM CadNSDI positional accuracy varies by county and survey vintage — typically better than a few meters in well-resurveyed areas, occasionally coarser in remote or older-survey areas. Coordinates are returned in the service's NAD83 datum reprojected to WGS84 (EPSG:4326); NAD83 and current WGS84 can differ by roughly 1–2 meters in California due to tectonic drift, which is usually within your target tolerance but worth knowing if you're cross-checking against a handheld GPS.

      
Scope. Currently covers California's three principal meridians (Humboldt, Mount Diablo, San Bernardino). Fractional/duplicate townships near meridian and baseline lines aren't handled by this simple form. This locates aliquot-part corners (quarter and quarter-quarter sections); Government Lots and metes-and-bounds parcels along rivers/shorelines aren't aliquot parts and won't be found by this tool — if your section is lotted, the error message will say so.