[GeoJSON] spec clarification of CRS

Raj Singh raj at rajsingh.org
Wed Dec 11 12:38:50 PST 2013


I'd like to suggest that in section 3.1 Named CRS [1], a sentence be added that says, "EPSG:4326 identifiers such as EPSG:4326 and urn:ogc:def:crs:EPSG:6.6:4326 are prohibited, as they define coordinate reference systems with Y-X axis order, which is illegal according to section 2.1.1."
(a good reference on the issue is [2]).

As we move into 2014, confusion still reigns on this issue. And the current wording of the GeoJSON spec implies that EPSG:4326 is OK, which is an internally contradictory statement. Don't make the same mistake OGC did a decade ago!

[1] http://www.geojson.org/geojson-spec.html#named-crs
[2] http://www.directionsmag.com/articles/a-history-of-the-order-of-x-y-and-z-150-and-why-its-important/122601

---
Raj Singh




More information about the GeoJSON mailing list