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calvinmetcalf

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Loading data with workers into leaflet

Using communistjs to load ≈100k points into a leafletjs map via transferable objects.

<!DOCTYPE html>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
  <meta name="viewport" content="width=1024, user-scalable=no">
<link rel="stylesheet" href="style.css" />
<link rel="stylesheet" href="https://cdn.leafletjs.com/leaflet-0.5.1/leaflet.css" />
<link rel="stylesheet" href="https://raw.github.com/Leaflet/Leaflet.markercluster/master/dist/MarkerCluster.css" />
<link rel="stylesheet" href="//raw.github.com/Leaflet/Leaflet.markercluster/master/dist/MarkerCluster.Default.css" />
<title>Leaflet Worker</title>
<div id="map"></div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.5.1/leaflet.min.js"></script>
<script src="//cdn.jsdelivr.net/gh/tildeio/rsvp.js/browser/rsvp.js"></script>
<script src="//cdn.jsdelivr.net/gh/calvinmetcalf/communist/communist.js"></script>
<script src="//cdn.jsdelivr.net/gh/leaflet-extras/leaflet-providers/leaflet-providers.js"></script>
<script src="//cdn.jsdelivr.net/gh/leaflet/leaflet.markercluster/dist/leaflet.markercluster.js"></script>
<script>
var float,floatLayer;
	var m = L.map("map").setView([42.391737603908844, -71.10111236572266],12);
	var lc = L.control.layers.provided(["OpenStreetMap","OpenStreetMap.DE","MapQuestOpen.OSM"],{},{collapsed:false}).addTo(m);
	communist.ajax("../d3/somer.json",function(a,cb){
		var len = a.length;
		var i = 0;
		var out = new Float64Array(len*2);
		while(i<len){
			out[(i*2)]=a[i][0];
			out[(i*2)+1]=a[i][1];
			i++;
		}
		cb(out.buffer,[out.buffer]);
	}).then(function(a){
		float=new Float64Array(a);
		var i = 0;
		var len = float.length;
		var temp = new Array(len/2);
		while(i<len){
			temp[i/2]=L.marker([float[i],float[i+1]]);
			i++;
			i++;
		}
		floatLayer = new L.MarkerClusterGroup();
		floatLayer.addLayers(temp).addTo(m);
		lc.addOverlay(floatLayer,"Float64");
	});
</script>

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<!DOCTYPE html>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
  <meta name="viewport" content="width=1024, user-scalable=no">
<link rel="stylesheet" href="style.css" />
<link rel="stylesheet" href="https://cdn.leafletjs.com/leaflet-0.5.1/leaflet.css" />
<link rel="stylesheet" href="https://raw.github.com/Leaflet/Leaflet.markercluster/master/dist/MarkerCluster.css" />
<link rel="stylesheet" href="//raw.github.com/Leaflet/Leaflet.markercluster/master/dist/MarkerCluster.Default.css" />
<title>Leaflet Worker</title>
<div id="map"></div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.5.1/leaflet.min.js"></script>
<script src="//cdn.jsdelivr.net/gh/tildeio/rsvp.js/browser/rsvp.js"></script>
<script src="//cdn.jsdelivr.net/gh/calvinmetcalf/communist/communist.js"></script>
<script src="//cdn.jsdelivr.net/gh/leaflet-extras/leaflet-providers/leaflet-providers.js"></script>
<script src="//cdn.jsdelivr.net/gh/leaflet/leaflet.markercluster/dist/leaflet.markercluster.js"></script>
<script>
var float,floatLayer;
    var m = L.map("map").setView([42.391737603908844, -71.10111236572266],12);
    var lc = L.control.layers.provided(["OpenStreetMap","OpenStreetMap.DE","MapQuestOpen.OSM"],{},{collapsed:false}).addTo(m);
    communist.ajax("../d3/somer.json",function(a,cb){
        var len = a.length;
        var i = 0;
        var out = new Float64Array(len*2);
        while(i<len){
            out[(i*2)]=a[i][0];
            out[(i*2)+1]=a[i][1];
            i++;
        }
        cb(out.buffer,[out.buffer]);
    }).then(function(a){
        float=new Float64Array(a);
        var i = 0;
        var len = float.length;
        var temp = new Array(len/2);
        while(i<len){
            temp[i/2]=L.marker([float[i],float[i+1]]);
            i++;
            i++;
        }
        floatLayer = new L.MarkerClusterGroup();
        floatLayer.addLayers(temp).addTo(m);
        lc.addOverlay(floatLayer,"Float64");
    });
</script>
    

Modified http://cdn.leafletjs.com/leaflet-0.5.1/leaflet.js to a secure url

Updated missing url //raw.github.com/tildeio/rsvp.js/master/browser/rsvp.js to //cdn.jsdelivr.net/gh/tildeio/rsvp.js/browser/rsvp.js

Updated missing url //raw.github.com/calvinmetcalf/communist/master/communist.js to //cdn.jsdelivr.net/gh/calvinmetcalf/communist/communist.js

Updated missing url //raw.github.com/leaflet-extras/leaflet-providers/master/leaflet-providers.js to //cdn.jsdelivr.net/gh/leaflet-extras/leaflet-providers/leaflet-providers.js

Updated missing url //raw.github.com/Leaflet/Leaflet.markercluster/master/dist/leaflet.markercluster.js to //cdn.jsdelivr.net/gh/leaflet/leaflet.markercluster/dist/leaflet.markercluster.js

https://cdn.leafletjs.com/leaflet-0.5.1/leaflet.js

https://raw.github.com/tildeio/rsvp.js/master/browser/rsvp.js

https://raw.github.com/calvinmetcalf/communist/master/communist.js

https://raw.github.com/leaflet-extras/leaflet-providers/master/leaflet-providers.js

https://raw.github.com/Leaflet/Leaflet.markercluster/master/dist/leaflet.markercluster.js