Posts tagged ‘heatmap’

Applying weighting to heatmaps

Heatmap with weighting applied

Following up on the playing around I was having with heatmaps the other day, I made a few updates to the script to allow for each point to have an associated ‘intensity’. When the points are plotted, the intensities are normalised and each point plotted with a relative intensity (as shown in the image on the right).
Few other little changes I made:

  • allow the area covered by the size of the final image to be specified, rather than using the max & min x/y coordinates from the input points
  • change how the the dots are built – in theory should be a little quicker – but I’ve not tested with large enough dataset to know if it makes a big difference
  • in my demo script I’ve shown how you can convert the latitude to its Mercartor projection coordinate

For those interested in the changes I made to the script you can download the diff and an example script. Any feedback, comments welcome 🙂