Definition of "geoid_model"

NOTE: Markdown does not support highlighting in color, so bold/italic has been used to highlight the material being discussed. This issue is extracted from the document submitted by Roger Lott at https://github.com/opengeospatial/CRS-JSON-Encoding/blob/main/ProjJson%20v0-7%20RL%202024-06-16.docx for discussion at the CRS SWG meeting OGC held during the Montreal June 2024 TC meeting.

"geoid_model": {
"type": "object",
"properties": {
"name": { "type": "string" },

"interpolation_crs": { "$ref": "#/definitions/crs" }, STRIKE THIS LINE
"transformation": { "$ref": "#/definitions/transformation" },

    "id": { "$ref": "#/definitions/id" }
  },
  "required" : [ "name" ],
  "additionalProperties": false
},

"$comment": "[RL] Is the geoid model(s) attribute correctly modelled? A geoid model is usually described as a transformation."

"$comment": "[RL] If its use in vertical_crs were changed as suggested below, is this geoid model member actually needed in the schema?"

Read the linked ProjJson v0-7 document and inspect the shown geoid_model definition, including the proposed removal of interpolation_crs and use of transformation. Resolve whether geoid_model is still needed in vertical_crs, then document the agreed schema decision and update the relevant validation coverage.