pramsey commented on code in PR #560: URL: https://github.com/apache/parquet-format/pull/560#discussion_r3029293647
########## Geospatial.md: ########## @@ -44,8 +44,57 @@ locations on Earth. The default CRS `OGC:CRS84` means that the geospatial features must be stored in the order of longitude/latitude based on the WGS84 datum. -Custom CRS can be specified by a string value. It is recommended to use an -identifier-based approach like [Spatial reference identifier][srid]. +Non-default CRS values are specified by any string that uniquely identifies a coordinate reference system associated with this type. +To maximize interoperability, suggested (but not limited to) formats for CRS are: +* `authority:code` - where `authority` represents some well known authorities, and `code` is the code used by the authority to identify the CRS. Examples are - `OGC:CRS84`, `OGC:CRS83`, `OGC:CRS27`, `EPSG:4326`, `EPSG:3857`. See [https://spatialreference.org/](https://spatialreference.org/) for definitions of coordinate reference systems provided by some well known authorities. Review Comment: True, I guess I'm just still grousing that my 25 year old assumption did not hold. ``` Table "public.spatial_ref_sys" Column | Type | Collation | Nullable | Default -----------+-------------------------+-----------+----------+--------- srid | integer | | not null | auth_name | character varying(256) | | | auth_srid | integer | | | srtext | character varying(2048) | | | proj4text | character varying(2048) | | | ``` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
