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— crs

Local-Grid Coordinates: When 'Northing 5000, Easting 5000' Means Nothing

Older boundary surveys often use an arbitrary office origin instead of a real coordinate datum. The PNEZD looks fine. The numbers add up. But there's no way to put those points on a map without a ground-truth anchor. Here's how to recognize a local-grid archive, what you can and can't do with it, and how to pull it into a real CRS when you have to.

May 2026 · 7 min read

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