For further mappings of big multidimensional datasets (datacubes) to heatmaps: <a href="http:&#x2F;&#x2F;vis.stanford.edu&#x2F;projects&#x2F;immens&#x2F;" rel="nofollow">http:&#x2F;&#x2F;vis.stanford.edu&#x2F;projects&#x2F;immens&#x2F;</a> , <a href="http:&#x2F;&#x2F;www.nanocubes.net&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.nanocubes.net&#x2F;</a>,  and <a href="http:&#x2F;&#x2F;www.mapd.com&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.mapd.com&#x2F;</a> . I&#x27;m not as familiar with the GIS space, but suspect a bunch there too.