CRS: Difference between revisions
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So the same numeric coordinates can point to different places depending on the CRS. | So the same numeric coordinates can point to different places depending on the CRS. | ||
Common examples | ===Common examples=== | ||
* Web Mercator (EPSG:3857): x/y in meters for many web maps and default in the {{software}}. | * Web Mercator (EPSG:3857): x/y in meters for many web maps and default in the {{software}}. | ||
* WGS 84 (EPSG:4326): longitude/latitude in degrees (used by GPS and [[GeoJSON]]). | * WGS 84 (EPSG:4326): longitude/latitude in degrees (used by GPS and [[GeoJSON]]). | ||
* RD New (EPSG:28992): coordinates in meters (Easting, Northing), based on the Dutch Amersfoort datum. | |||
{{article end | {{article end | ||
|seealso=*[[GeoJSON]] | |seealso=*[[GeoJSON]] | ||
}} | }} | ||
Revision as of 13:15, 15 July 2026
A Coordinate Reference System (CRS) tells you how to interpret coordinates on a map.
It defines:
- The coordinate system (e.g., latitude/longitude vs. x/y)
- The map projection or datum (how the Earth’s shape is transformed to a flat map)
- The units and axes (degrees, meters, etc.)
So the same numeric coordinates can point to different places depending on the CRS.
Common examples
- Web Mercator (EPSG:3857): x/y in meters for many web maps and default in the Tygron Platform.
- WGS 84 (EPSG:4326): longitude/latitude in degrees (used by GPS and GeoJSON).
- RD New (EPSG:28992): coordinates in meters (Easting, Northing), based on the Dutch Amersfoort datum.