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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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    Yes, looks like a local (0,0) system in QGIS 2.8.1. Works in QGIS 2.6. – Jakob Mar 5 '15 at 12:44
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    This is a known bug in 2.8.1, which should be fixed in 2.8.2. – Simbamangu Mar 5 '15 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 '15 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 '15 at 18:33
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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.

  • You can also use the on-the-fly heatmap generator on the layer style of the properties dialog. – DavidF Mar 17 '15 at 18:34
  • What is this "on-the-fly heatmap generator"? Are you talking about layer blending modes on the point layer? – Nate Wessel Mar 20 '15 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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