Server WMS temporal properties support (Request in QGIS)

[qgis-bot]

Request for documentation

From pull request qgis/QGIS#48497
Author: @elpaso
QGIS version: 3.26

Server WMS temporal properties support

PR Description:

Server WMS temporal properties

QGIS Server currently supports Dimensions ( TIME, ELEVATION etc.) for vector layers only and does not integrate with the (newer) temporal properties API of QGIS.

This PR exposes the temporal properties to the server: the server will expose the TIME dimension from the temporal properties to GetCapabilities and accept a TIME query string parameter to activate the time filtering.

Accepted TIME syntax

The OAPIF implementation will be used to parse the time instants and ranges:

     * Interval syntax:
     *
     *   interval-closed     = date-time "/" date-time
     *   interval-open-start = [".."] "/" date-time
     *   interval-open-end   = date-time "/" [".."]
     *   interval            = interval-closed / interval-open-start / interval-open-end
     *   datetime            = date-time / interval

Note that a list of instants and ranges will not be supported at this time.

Potential conflicts with defined TIME dimension

To solve the conflict, if a TIME dimension was explicitly defined for a vector layer, the temporal properties for that layer will not be activated and the explicitly set TIME dimension will be considered instead, this will solve compatibility issues with older projects.

TODO

• Tests
• Decide how to handle open ending/beginning interval and how to expose them in the capabilities
• Expose "Default" to capabilities

Funded by: Gis3W

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