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August 21, 2012 20:34
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Google Maps JavaScript API v3 Example: Heatmap Layer</title> | |
| <link href="/maps/documentation/javascript/examples/default.css" rel="stylesheet"> | |
| <script src="https://maps.googleapis.com/maps/api/js?key=XXXX&sensor=false&libraries=visualization"></script> | |
| <script> | |
| // Adding 500 Data Points | |
| var map, pointarray, heatmap; | |
| var taxiData = [ | |
| <% checkins.each do | checkin | %> | |
| <% if checkin && checkin.venue && checkin.venue.location %> | |
| new google.maps.LatLng(<%= checkin.venue.location.lat %>, <%= checkin.venue.location.lng %>), | |
| <% end %> | |
| <% end %> | |
| ]; | |
| function initialize() { | |
| var mapOptions = { | |
| zoom: 4, | |
| center: new google.maps.LatLng(37.774546, -122.433523), | |
| mapTypeId: google.maps.MapTypeId.HYBRID | |
| }; | |
| map = new google.maps.Map(document.getElementById('map_canvas'), | |
| mapOptions); | |
| // pointArray = new google.maps.MVCArray(taxiData); | |
| heatmap = new google.maps.visualization.HeatmapLayer({ | |
| data: taxiData | |
| }); | |
| heatmap.setMap(map); | |
| changeGradient(); | |
| changeRadius(); | |
| } | |
| function changeGradient() { | |
| var gradient = [ | |
| 'rgba(0, 255, 255, 0)', | |
| 'rgba(0, 255, 255, 1)', | |
| 'rgba(0, 191, 255, 1)', | |
| 'rgba(0, 127, 255, 1)', | |
| 'rgba(0, 63, 255, 1)', | |
| 'rgba(0, 0, 255, 1)', | |
| 'rgba(0, 0, 223, 1)', | |
| 'rgba(0, 0, 191, 1)', | |
| 'rgba(0, 0, 159, 1)', | |
| 'rgba(0, 0, 127, 1)', | |
| 'rgba(63, 0, 91, 1)', | |
| 'rgba(127, 0, 63, 1)', | |
| 'rgba(191, 0, 31, 1)', | |
| 'rgba(255, 0, 0, 1)' | |
| ] | |
| heatmap.setOptions({ | |
| gradient: heatmap.get('gradient') ? null : gradient | |
| }); | |
| } | |
| function changeRadius() { | |
| heatmap.setOptions({radius: heatmap.get('radius') ? null : 20}); | |
| } | |
| </script> | |
| </head> | |
| <body onload="initialize()"> | |
| <div id="map_canvas" style="height: 600px; width: 800px;"></div> | |
| </body> | |
| </html> |
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| require 'sinatra' | |
| require 'foursquare2' | |
| get '/' do | |
| client = Foursquare2::Client.new(:oauth_token => 'abc123') | |
| checkins = [] | |
| for i in 0..25 | |
| ci = client.user_checkins(:limit => 250, :offset => i*250) | |
| checkins += ci.items | |
| end | |
| puts checkins.to_json | |
| erb :map, :locals => {:checkins => checkins} | |
| end |
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