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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

 Name                                          Last modified      Size  
 Parent Directory                                                   -   
 Business-AT-SSN-0.9.meta                      21-Nov-2014 19:11  1.6K  
 Business-AT-SSN-0.9.readme                    21-Nov-2014 19:11  1.1K  
 Business-AT-SSN-0.9.tar.gz                    21-Nov-2014 19:13   10K  
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 Business-AT-SSN-0.92.readme                   24-Nov-2014 09:30  1.2K  
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 CHECKSUMS                                     21-Nov-2021 22:35  8.9K  
 Geo-Heatmap-0.05.readme                       16-Jan-2013 16:14  1.7K  
 Geo-Heatmap-0.05.tar.gz                       17-Jan-2013 12:40  2.5M  
 Geo-Heatmap-0.06.meta                         18-Jan-2013 13:48  634   
 Geo-Heatmap-0.06.readme                       18-Jan-2013 13:48  1.7K  
 Geo-Heatmap-0.06.tar.gz                       18-Jan-2013 13:55  1.2M  
 Geo-Heatmap-0.07.meta                         25-Jan-2013 18:29  634   
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 Geo-Heatmap-0.07.tar.gz                       25-Jan-2013 21:52  1.2M  
 Geo-Heatmap-0.16.1.meta                       05-Dec-2013 15:52  627   
 Geo-Heatmap-0.16.1.readme                     05-Dec-2013 15:52  1.7K  
 Geo-Heatmap-0.16.1.tar.gz                     05-Dec-2013 16:03  1.9M  
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 Geo-Heatmap-0.17.tar.gz                       08-Dec-2013 21:19  1.1M  
 Geo-Heatmap-0.18.meta                         09-Dec-2013 10:01  1.9K  
 Geo-Heatmap-0.18.readme                       09-Dec-2013 10:01  2.1K  
 Geo-Heatmap-0.18.tar.gz                       09-Dec-2013 10:03  1.1M  
 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  
 README                                        17-Jan-2013 12:33  1.7K  
 RT-Extension-BounceEmail-0.02.meta            10-Nov-2015 15:41  1.5K  
 RT-Extension-BounceEmail-0.02.readme          10-Nov-2015 15:41  1.1K  
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