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December 11, 2015 17:48
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topojson on gmaps
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <style type="text/css"> | |
| html, body, #map_canvas { height: 100%; margin: 0;} | |
| </style> | |
| <script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?sensor=false"></script> | |
| <script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script> | |
| <script src="https://raw.github.com/mbostock/topojson/master/topojson.js"></script> | |
| <script src="https://raw.github.com/JasonSanford/GeoJSON-to-Google-Maps/master/GeoJSON.js"></script> | |
| <script> | |
| initialize = function(){ | |
| var mapOptions = { | |
| center: new google.maps.LatLng(35, -105), | |
| zoom: 4, | |
| mapTypeId: google.maps.MapTypeId.ROADMAP | |
| }; | |
| var map = new google.maps.Map(document.getElementById("map_canvas"), | |
| mapOptions); | |
| $.getJSON('http://bl.ocks.org/d/4554134/us_counties.json', function (data) { | |
| var county_geojson = topojson.object(data, data.objects.counties), | |
| state_geojson = topojson.object(data, data.objects.states); | |
| var style = { | |
| strokeColor: "#FFFF00", | |
| strokeWeight: 1, | |
| strokeOpacity: 0.45, | |
| fillOpacity: 0.1, | |
| }; | |
| var counties = new GeoJSON(county_geojson, style); | |
| //restyle for states | |
| style.strokeWeight = 2; | |
| style.strokeColor = 'black'; | |
| var states = new GeoJSON(state_geojson, style); | |
| addGeometries(counties); | |
| addGeometries(states); | |
| }); | |
| addGeometries = function(overlays, style){ | |
| $.each(overlays, function(i, overlay){ | |
| if (!overlay.length) { | |
| overlay.setMap(map); | |
| } else { | |
| // recurse for multigeoms | |
| addGeometries(overlay) | |
| } | |
| }) | |
| } | |
| } | |
| </script> | |
| </head> | |
| <body onload="initialize()"> | |
| <div id="map_canvas" style="width:100%; height:100%"></div> | |
| </body> | |
| </html> | |
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