D3 Examples - d3.carto.layer.alias

d3.carto.layer.alias - d3.carto.map

Using d3.carto.layer with d3.carto.map.

Each d3.carto.layer is defined and then added to the map using map.addCartoLayer. You can access the added layers using map.layers(). Each layer fires a "load" event once successfully added to the map.

This example uses d3.carto.layer.layerType() aliases like d3.carto.layer.tile() and d3.carto.layer.topojson().

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<html xmlns="https://www.w3.org/1999/xhtml">
<head>
  <title>d3.carto.map - d3.carto.layer.alias</title>
  <meta charset="utf-8" />
    <link type="text/css" rel="stylesheet" href="d3map.css" />
    <link type="text/css" rel="stylesheet" href="example.css" />
</head>
<style>
  html,body {
    height: 100%;
    width: 100%;
    margin: 0;
  }
​
  #map {
    height: 100%;
    width: 100%;
    position: absolute;
  }
​
</style>
<script>
    function makeSomeMaps() {
    map = d3.carto.map();
​
    d3.select("#map").call(map);
​
    tileLayer = d3.carto.layer.tile();
    tileLayer
    .path("examples.map-zgrqqx0w")
    .label("Base")
    .on("load", recenter);
​
    geojsonLayer = d3.carto.layer.geojson();
    geojsonLayer
    .path("https://bl.ocks.org/emeeks/raw/c970c9ee3e242e90004b/world.geojson")
    .label("GeoBorders")
    .cssClass("countryborders")
    .renderMode("canvas")
    .on("load", createFeatureLayer);
    
    topojsonLayer = d3.carto.layer.topojson();
    topojsonLayer
    .path("https://bl.ocks.org/emeeks/raw/c970c9ee3e242e90004b/sample_routes.topojson")
    .label("TopoRoutes")
    .cssClass("roads")
    .renderMode("svg")
    .on("load", function() {console.log("load topojson")});
​
    csvLayer = d3.carto.layer.csv();
    csvLayer
    .type("csv")
    .path("https://bl.ocks.org/emeeks/raw/c970c9ee3e242e90004b/sample_points.csv")
    .label("CSV Points")
    .cssClass("pinkcircle")
    .renderMode("svg")
    .markerSize(3)
    .x("x")
    .y("y")
    .on("load", changeMarkers);
​
    map.addCartoLayer(tileLayer);
    map.addCartoLayer(topojsonLayer);
    map.addCartoLayer(geojsonLayer);
    map.addCartoLayer(csvLayer);
​
    function recenter() {
      map.centerOn([-0.1275,51.507],"latlong",5000);
    }
​
    function changeMarkers() {
          csvLayer.g().selectAll("circle").remove();
​
          csvLayer.g().selectAll("g.marker")
            .append("rect")
            .attr("class", "bluesquare")
            .attr("height", 5)
            .attr("width",5)
            .attr("x",-2.5)
            .attr("y",-2.5);
    }
    
    function createFeatureLayer() {
      var featuresArray = [];
      var mapLayers = map.layers();
      mapLayers.forEach(function (layer) {
        if (layer.label() == "GeoBorders") {
          featuresArray = layer.features();
        }
      })
     shortNameCountries = featuresArray.filter(function(d) {return d.properties.name.length < 7})
​
    featureLayer = d3.carto.layer.featureArray();
    featureLayer
    .features(shortNameCountries)
    .label("Feature Array")
    .cssClass("halffilledcountries")
    .renderMode("svg")
    .on("load", function(){console.log("load featurearray")}); 
    
    map.addCartoLayer(featureLayer);
​
    }
​
  }
​
</script>
<body onload="makeSomeMaps()">
<div id="map"></div>
<footer>
<script src="https://d3js.org/d3.v3.min.js" charset="utf-8" type="text/javascript"></script>
<script src="https://d3js.org/topojson.v1.min.js" type="text/javascript">
</script>
<script src="https://d3js.org/d3.geo.projection.v0.min.js" type="text/javascript">
</script>
<script src="/emeeks/f3105fda25ff785dc5ed/example/tile.js" type="text/javascript">
</script>
<script src="/emeeks/f3105fda25ff785dc5ed/example/d3.quadtiles.js" type="text/javascript">
</script>
<script src="/emeeks/f3105fda25ff785dc5ed/example/d3.geo.raster.js" type="text/javascript">
</script>
<script src="https://cdn.jsdelivr.net/gh/emeeks/d3-carto-map/d3.carto.map.js" type="text/javascript">
</script>
</footer>
</body>
</html>
    