WKT-CRS - Well-Known Text for Coordinate Reference Systems
Well-known text representation of coordinate reference systems (WKT or WKT-CRS) is a text markup language for representing spatial reference systems and transformations between spatial reference systems. The formats were originally defined by the Open Geospatial Consortium (OGC) and described in their Simple Feature Access and Well-known text representation of coordinate reference systems specifications. The current standard definition is ISO 19162:2019.
Version History
| Name | Year | Description | ISO |
|---|---|---|---|
| WKT | (1999 | As initially defined by the Open Geospatial Consortium (OGC) | |
| "WKT 1" | (2001 | WKT was extended in 2001. Sometimes known as "WKT 1". | ISO 19125-1:2004 |
| "WKT 2" / "WKT-CRS 1" | (2015) | Addresses new requirements and inconsistencies in WKT 1. | ISO 19162:2015 |
| "WKT-CRS 2" | (2018) | A newer revision. | ISO 19162:2019 |