Missing high-level properties for transformation (and likely coordinatereferencesystem)
CoordinateTransformation.v.1.0.0 seems to miss properties that would be useful
- Remarks (optional in EPSG). For example CT EPSG::1612 has https://epsg.org/transformation_1612/ED50-to-WGS-84-23.html | Parameter values are taken from ED50 to ETRS89 (1), code 1588. Adopted for ED50 to WGS84 transformations offshore Norway north of 62N from April 2001 when it replaced code 1590. Included in Statens Kartverk programme wsktrans from v4.0.
but this metadata is not there?
- The Usages are there, with scope and extent. For extent the Name is there. But not the description
For example for CT EPSG::1149there is
"Name": "Europe - ETRF by country"
https://epsg.org/transformation_1149/ETRS89-to-WGS-84-1.html
but the extent description is not there : Europe - onshore and offshore: Albania; Andorra; Austria; Belgium; Bosnia and Herzegovina; Bulgaria; Croatia; Cyprus; Czechia; Denmark; Estonia; Faroe Islands; Finland; France; Germany; Gibraltar; Greece; Hungary; Ireland; Italy; Kosovo; Latvia; Liechtenstein; Lithuania; Luxembourg; Malta; Moldova; Monaco; Montenegro; Netherlands; North Macedonia; Norway including Svalbard and Jan Mayen; Poland; Portugal; Romania; San Marino; Serbia; Slovakia; Slovenia; Spain; Sweden; Switzerland; United Kingdom (UK) including Channel Islands and Isle of Man; Vatican City State.
When this is in reference data these countries can be very handy.
- no validity status (deprecation). Maybe OSDU does not directly require this but I'd still think it should be included for cases that CRS/CT definition is transferred and then deprecated. This is bit tricky with BoundCRSs.
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This likely is similar for CRS.
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I understand the OSDU model is not 100% complete and mainly focuses on the persistent reference string. But both top-level entity remarks as well as Usage extent description are very handy metadata.
For CRS properties
- It seems there is a CoordinateReferenceSystemType as enum per EPSG data model. But it seems awkward/not clear how to know the subtype of geodetic (i.e., geocentric or geog2D or geog3D). There is a "Kind" but that is a string. I'd argue somehow there needs to be a very clear and simple way of knowing if a CRS or coordinates are geocentric or geog2D or geog3D