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I noticed that the heatmap calculation on the new upgrade version of qgis is given the raster map without any coordinate system.

Have you got the same problem?

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  • 1
    Yes, looks like a local (0,0) system in QGIS 2.8.1. Works in QGIS 2.6.
    – Jakob
    Mar 5, 2015 at 12:44
  • 2
    This is a known bug in 2.8.1, which should be fixed in 2.8.2.
    – Simbamangu
    Mar 5, 2015 at 13:42
  • This looks like the same issue I'm having, good to see it's being addressed: gis.stackexchange.com/questions/137891/…
    – Tumbledown
    Mar 6, 2015 at 14:09
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    It looks like the heatmaps are being referenced in image coordinates, not the coords of the SRS.
    – DavidF
    Mar 17, 2015 at 18:33

2 Answers 2

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This is a known bug in 2.8.1, which is (according to the tracker) slated for fixing in 2.8.2.

As an alternative, you can use v.kernel from the Processing toolbox.

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  • You can also use the on-the-fly heatmap generator on the layer style of the properties dialog.
    – DavidF
    Mar 17, 2015 at 18:34
  • What is this "on-the-fly heatmap generator"? Are you talking about layer blending modes on the point layer? Mar 20, 2015 at 1:43
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Until it get fixed You can do as follows with one more step:

  1. Calculate heatmap as normal
  2. Create new raster with Raster > Projections > Warp(Reproject) - leave the original projection
  3. Magic - the new raster is exactly where it belongs :)

I got this answer from @Joseph who gave helpful comment in the duplicate thread: QGIS 2.8 Raster Layers Moved and encouraged me to post it here.

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