[raster][temporal] Add a brand new temporal mode: pixel value as temporal datetime (Request in QGIS)

[qgis-bot]

Request for documentation

From pull request qgis/QGIS#57035
Author: @nirvn
QGIS version: 3.38

[raster][temporal] Add a brand new temporal mode: pixel value as temporal datetime

PR Description:

Description

This PR implements a new temporal mode for raster layers which interprets each pixel as a datetime value. When rendering a raster layer using that temporal mode, pixels will be hidden whenever they fall outside of the temporal range attached to the render context.

In action, this is how it looks using a simple GLAD deforestation alerts geotiff:

Screencast.from.2024-04-04.09-52-39.webm

And here's how the setup UI looks like:

Interesting temporal use cases include:

• representation of land use change such as forest loss (as seen above)
• representation of flooding over time
• representation of movement cost (e.g. GRASS' r.walk)
• etc.

The implementation here is taken from @nyalldawson 's elevation surface representation functionality merged earlier this year. Thanks for the inspiration!

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