[mapserver-commits] [MapServer/MapServer] b59a5c: Add GetFeatureInfo support for CONNECTIONTYPE KERN...

[Trygve Aspenes]

  Branch: refs/heads/main
  Home:   https://github.com/MapServer/MapServer
  Commit: b59a5cc6b4d1dbf3bf56362496945f407e6da3c9
      https://github.com/MapServer/MapServer/commit/b59a5cc6b4d1dbf3bf56362496945f407e6da3c9
  Author: Trygve Aspenes <Trygve.Aspenes at met.no>
  Date:   2026-04-19 (Sun, 19 Apr 2026)

  Changed paths:
    A msautotest/gdal/expected/heatmap-getfeatureinfo.html
    M msautotest/gdal/heat.map
    A msautotest/gdal/heatmap_query.html
    M src/maprasterquery.c

  Log Message:
  -----------
  Add GetFeatureInfo support for CONNECTIONTYPE KERNELDENSITY/IDW layers (#7478)

* Add GetFeatureInfo support for CONNECTIONTYPE KERNELDENSITY/IDW layers

msRasterQueryByRect() previously returned immediately with no results
when layer->data and layer->tileindex were both NULL, which is always
the case for KERNELDENSITY and IDW layers. These connection types
generate an in-memory GDAL dataset on the fly via msInterpolationDataset().

Changes:
- Bypass the early-return guard for KERNELDENSITY/IDW in msRasterQueryByRect()
- Call msGDALInitialize() unconditionally before the dataset branch so the
  GDAL MEM driver is always registered
- Compute map->cellsize via msAdjustExtent() when it is 0 (query path does
  not call msCalculateScale() unlike the draw path), restore it afterwards
- Create and query the interpolation dataset, then clean up as in the draw path

Test: new RUN_PARMS in msautotest/gdal/heat.map exercising WMS GetFeatureInfo
against the existing kerneldensity heatmap layer.

* pre-commit

---------

Co-authored-by: Trygve Aspenes <trygveas at met.no>



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