- This repo uses the wkt-crs package package to determine properties such as
hasZ,typeandflipCoords. - The
wktdefinitions are gotten from SpatialReferenceOrg. It derives these definitions from - There are only ogc-wkt2 wkt definitions from OGC, ESRI and EPSG available on this project because of corresponding default SRIDs available by default. Also only non-deprecated CRSs are included
- The CRS listed here are intended for use with an ORM where you can alter Spatial Properties of data such as AxisOrder, transformations and
PROJ version: 9.4.1
This is a JSON file where the
- k is authority_code.
- v is an object with the following properties
- type is either GeographicCRS or ProjectedCRS
- crs is a string/url with the format http://www.opengis.net/def/{authority}/{version}/{code}
- wkt is the well-known text string from spatialreference.org
- version is the version of the CRS. Uses 0 for all ESRI/EPSG CRSs , 0 for CRS84 and 1.3 for OGC CRSs
- authority is the entity that governs this crs definition.
- hasZ is whether the CRS supports the z-index. Is boolean.
- flipCoords is whether the coordinates returned should have their order reversed.
- Given that PostGIS stores coordinates in x,y axis order, flipCoords for all type===GeographicCRS except for those by authority OGC. This is because OGC Geographic CRS use x,y axis order despite not being planar in definition
- srid Is the Spatial Reference Identifier. Commonly used by PostGIS for almost all operations. One can add theirs but given OGC CRSs are versions of existing ones such as CRS84->EPSG:4326, CRS84h->EPSG:4327, CRS83->EPSG:4269 and CRS27->EPSG:4327, no need to modify the spatial_ref_sys table used by PostGIS
TypeScript Type/Interface:
type: "GeographicCRS" | "ProjectedCRS";
crs?: string;
wkt?: string;
version: number;
code: string | number;
srid: number;
authority: string;
hasZ: boolean;
flipCoords: boolean;
}