The OGR VRT format supports all spatial reference systems recognized by the OGR library. Specifying a spatial reference system in a VRT dataset will override that of the underlying dataset. Spatial reference systems may be specified as follows:
- OGC Well Known Text definition
- “EPSG:n” - where n is a recognized ESPG code
- “EPSGA:n” - where n is a recognized ESPGA code
- “AUTO:proj_id,unit_id,lon0,lat0” – WMS auto projections
- “urn:ogc:crs:EPSG:n” – OGC URNs
- PROJ.4 defintion
- Filename – file contents will be read as WKT, XML or PROJ.4
- OGR well known names eg, NAD27, WGS84
- ESRI WKT when prefixed with “ESRI::”