Add data defined control over heatmap radius and maximum value (Request in QGIS)

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Request for documentation

From pull request qgis/QGIS#57328 Author: @nyalldawson QGIS version: 3.38

Add data defined control over heatmap radius and maximum value

PR Description:

This allows users to define the radius and maximum as a value which makes sense for the current situation, e.g the current map scale, current print atlas feature, or current temporal range.

Additionally includes the base changes required for feature renderer level data defined properties, which may be useful for other vector renderer classes (Eg the point cluster/displacement ones)

Sponsored by Rubicon Concierge Real Estate Services

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