[OSM-talk] OT: making heat maps and overlaying on OSM data

Colin Marquardt cmarqu42 at googlemail.com
Fri Feb 27 00:19:21 GMT 2009

2009/2/27  <simon at mungewell.org>:
>> Can anyone give me any tips on how to take a simple table of data with a
>> figure
>> for each coordinate, and turn it into a heat map? At first I thought of
>> GeoCommons but it seems you can only use pre-processed data with their
>> Maker
>> tool.
> It sounds like you don't want to do any pre-processing... if you change
> your mind you could:
> 1). Create a coloured overlay and place that as a translucent layer.
> http://openlayers.org/dev/examples/layer-opacity.html
> This could be a single image file, or another tile server (as per example).
> 2). Create a set of vector shapes (contours?) and overlay those using an
> OSM or other layer (could be heavy on browser if a larger area).
> The Srtm2Osm scripts already make the contours so these can probably be
> abused.

This reminds me of
(also see the comments).


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