Add vertical crs option for projects (Request in QGIS)

[qgis-bot]

Request for documentation

From pull request qgis/QGIS#56791
Author: @nyalldawson
QGIS version: 3.38

Add vertical crs option for projects

PR Description:

(refs qgis/QGIS-Enhancement-Proposals#267)

If the project CRS is a compound CRS, then the vertical CRS for the project will be the vertical component of the main project CRS. Otherwise it will be the value explicitly set by the user.

Users can specify the vertical crs through the Project Properties, Elevation tab:

Eg. when the project CRS is set to a compound crs, the user will see:

When the project CRS is a horizontal CRS, then the user can select a specific vertical CRS for their project:

Currently, this is a "metadata" type property only, and has no impact on rendering or handling of features. (It IS exposed through new @project_vertical_crs_xxx variables, though)

Commits tagged with [need-docs] or [FEATURE]