D3 Examples - Changing Markers

Changing Markers - d3.carto.map

Changing markers with d3.carto.map.

Each feature or point is added inside of a g element. You can then add whatever you want to that g element to create the symbols you want for your points. To do so, though, you need to use a different datum for the appended element. This doesn't seem like a good solution and will probably lead to the creation of a d3.carto.marker or equivalent at some point.

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<html xmlns="https://www.w3.org/1999/xhtml">
<head>
  <title>d3.carto.map - Changing Point Markers</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);
​
    map.addTileLayer("examples.map-zgrqqx0w", "Base", "mapbox", false);
    map.centerOn([-0.1275,51.507],"latlong",5000);
    map.addTopoJSONLayer("https://bl.ocks.org/emeeks/raw/c970c9ee3e242e90004b/sample_routes.topojson","TopoJSON","roads","svg","all");
    map.addCSVLayer("https://bl.ocks.org/emeeks/raw/c970c9ee3e242e90004b/sample_points.csv","CSV Points","pinkcircle",2,"svg","x","y");
    
    d3.select("#map").append("button").attr("class", "marker").html("Change Markers").on("click", changeMarkers);
    
    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);
    }
​
  }
</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="https://d3js.org/colorbrewer.v1.min.js"></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>
    