SPCS2022 Zone Bounding Box Coordinates
Last Updated 6/2/2025
- Latitude and longitude bounding box coordinates were rounded away from the zone polygon to 0.01° precision using floor and ceiling functions.
- Min and max northings and eastings are based on projected bounding boxes to account for parallel curvature and meridian convergence and were computed outward to 100 m and 100 ift precision using floor and ceiling functions.
- District of Columbia zone bounding box is for entire metropolitan area.
- Negative northings in the GLA and GTXN zones are exceptions to SPCS2022 Policy made to accommodate their design objectives.
- Bounding values may change slightly as zone polygons are refined for production release.
| Zone code | Zone abrv | Zone name | Min lat (deg) | Min lon east (deg) | Min lon west (deg) | Max lat (deg) | Max lon east (deg) | Max lon west (deg) | Min northing (m) | Min easting (m) | Max northing (m) | Max easting (m) | Min northing (ift) | Min easting (ift) | Max northing (ift) | Max easting (ift) |
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