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I have a long list of GeoHash codes for a certain geographic region. I'm using 6-character precision so for example if the area under study was Earl's Court in London, I would have a few six letter codes that for that region.

What I want to do is to be able to generate heat maps using this information. Specifically I want to colour a set of codes based on a certain condition.

I have searched but the only thing I have seen is the GeoHash query page (http://geohash.org/c216ne), but that just returns a marker to the a specific position, not the area.

Are there any tools for generating a heat map with this geoHash Information?

  • Are you hoping to generate a continuous values heat map (like temperatures based on weather-station readings; example) generated from the points in your GeoHash file, or are you trying to create a choropleth map of polygons that would be associated with areas the points are in? – RyanDalton Oct 16 '14 at 19:05
  • I'm looking at a choropleth., and that's exactly what I want to do except with squares. The idea is, I have an excel spreadsheet that looks something like this [{ccstsr, 45},{ccstsq, 77},{ccbvty, 10}]. Let's say ccstsr and ccstsq are in the same township so i'll call both Wembley. Then I want to plot the population of these towns that I have redefined from the geohash codes, on a map where each town is highlighted by the areas covered by all its associated codes.(that's two geohash codes for Wembley and 1 for the other town) – xupv5 Oct 17 '14 at 7:10
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I created a simple python script for converting geohashes to 3d Google Earth representations. This isn't exactly what you asked for, but if you'd like to create a cool looking thematic map (based on geohash) this will get you started.

You can get the code on github here:

geohash2kml

  • nice answer. Very thoughtful – Brad Nesom Jul 15 '15 at 20:04

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