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Contents of README:NAME: Geo::Heatmap overlay a density map (aka heatmap) over googlemaps see example here http://www.trust-box.at//dev/gm/GoogleMapsHeatmap/www/GoogleMapsHeatmap.html GET CODE https://github.com/MarkHofstetter/GoogleMapsHeatmap SYNOPSIS Create a Heatmap layer for GoogleMaps my $ghm = Geo::Heatmap->new(); $ghm->palette('palette.store'); $ghm->zoom_scale( { 1 => 298983, 2 => 177127, 3 => 104949, 4 => 90185, 5 => 70338, 6 => 37742, 7 => 28157, 8 => 12541, 9 => 3662, 10 => 1275, 11 => 417, 12 => 130, 13 => 41, 14 => 18, 15 => 10, 16 => 6, 17 => 2, 18 => 0, } ); $ghm->cache($cache); $ghm->return_points( \&get_points ); my $image = $ghm->tile($tile); You need a color palette (one is included) to encode values to colors, in Storable Format as an arrayref of arrayrefs eg [50] = [34, 45, 56] which means that a normalized value of 50 would lead to an RGB color of 34% red , 45% blue, 56% green zoom_scale the maximum number of points for a given google zoom scale, you would be able to extract to values from the denisity log or derive them from your data in some cunning way cache you need some caching for the tiles otherwise the map would be quite slow. Use a CHI object with the cache you like return_points is a function reference which expects a single hashref as a parameter which defines two LAT/LONG points to get all data points within this box $r->{LATN}, $r->{LNGW}), $r->{LATS}, $r->{LNGE} the function has to return an arrayref of arrayrefs of the points within the box tile returns the rendered image |
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Geo-Heatmap-0.05.readme 16-Jan-2013 16:14 1.7K
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Geo-Heatmap-0.16.1.meta 05-Dec-2013 15:52 627
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Geo-Heatmap-0.16.1.tar.gz 05-Dec-2013 16:03 1.9M
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GoogleMapsHeatmap-0.08.meta 25-Feb-2013 19:41 634
GoogleMapsHeatmap-0.08.readme 25-Feb-2013 19:41 1.7K
GoogleMapsHeatmap-0.08.tar.gz 25-Feb-2013 19:46 1.2M
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