Center on a Point - d3.carto.map

readme.md

How to center on a point with d3.carto.map.

The centerOn function can take "latlong" coordinates, which are latitude and longitude in XY order, or "scaled" coordinates, which are XY coordinates in the scaled space on the map. You can get latlong from d3.geo.centroid() and scaled from d3.geo.path.centroid().

d3map.css

path,circle,rect,polygon,ellipse,line {
    vector-effect: non-scaling-stroke;
}
svg, canvas {
    top: 0;
}
#d3MapZoomBox {
    position: absolute;
    z-index: 10;
    height: 100px;
    width: 25px;
    top: 10px;
    right: 50px;
}

#d3MapZoomBox > button {
    height:25px;
    width: 25px;
    line-height: 25px;
}


.d3MapControlsBox > button {
  font-size:22px;
  font-weight:900;
  border: none;
  height:25px;
  width:25px;
  background: rgba(35,31,32,.85);
  color: white;
  padding: 0;
  cursor: pointer;
}

.d3MapControlsBox > button:hover {
  background: black;
}

#d3MapPanBox {
    position: absolute;
    z-index: 10;
    height: 100px;
    width: 25px;
    top: 60px;
    right: 50px;
}
#d3MapPanBox > button {
    height:25px;
    width: 25px;
    line-height: 25px;
}

#d3MapPanBox > button#left {
  position: absolute;
  left: -25px;
  top: 10px;
}

#d3MapPanBox > button#right {
  position: absolute;
  right: -25px;
  top: 10px;
}

#d3MapLayerBox {
    position: relative;
    z-index: 10;
    height: 100px;
    width: 120px;
    top: 10px;
    left: 10px;
    overflow: auto;
    color: white;
    background: rgba(35,31,32,.85);
}

#d3MapLayerBox > div {
    margin: 5px;
    border: none;
}

#d3MapLayerBox ul {
    list-style: none;
    padding: 0;
    margin: 0;
    cursor: pointer;
}
#d3MapLayerBox li {
    list-style: none;
    padding: 0;
}

#d3MapLayerBox li:hover {
    font-weight:700;
}

#d3MapLayerBox li input {
    cursor: pointer;
}

div.d3MapModal {
    position: absolute;
    z-index: 11;
    background: rgba(35,31,32,.90);
    top: 50px;
    left: 50px;
    color: white;
    max-width: 400px;
}

div.d3MapModalContent {
    width:100%;
    height: 100%;
    overflow: auto;
}

div.d3MapModalContent > p {
    padding: 0px 20px;
    margin: 5px 0;
}

div.d3MapModalContent > h1 {
    padding: 0px 20px;
    font-size: 20px;
}

div.d3MapModalArrow {
    content: "";
	width: 0; 
	height: 0; 
	border-left: 20px solid transparent;
	border-right: 20px solid transparent;
	border-top: 20px solid rgba(35,31,32,.90);
        position: absolute;
        bottom: -20px;
        left: 33px;
}


#d3MapSVG {

}

rect.minimap-extent {
    fill: rgba(200,255,255,0.35);
    stroke: black;
    stroke-width: 2px;
    stroke-dasharray: 5 5;
}

circle.newpoints {
    fill: black;
    stroke: red;
    stroke-width: 2px;
}

path.newfeatures {
    fill: steelblue;
    fill-opacity: .5;
    stroke: pink;
    stroke-width: 2px;
}

example.css

.countrylabel {
    font-size: 12px;
    color: red;
    text-anchor: middle;
    pointer-events: none;
    font-weight: 900;
}

.wards {
    fill: gray;
    stroke: gray;
    stroke-width: 1px;
}

.countryborders {
    fill: rgba(0,0,0,0);
    stroke-width: 1px;
    stroke: gray;
    cursor: pointer;
}

.invisible {
    fill: rgba(0,0,0,0);
    stroke-width: 0;
    stroke: black;
    cursor: pointer;
}

.countries {
    fill: none;
    stroke-width: 1px;
    stroke: black;
    opacity: 1;
}

.halffilledcountries {
    fill: rgba(224,224,209,0.5);
    stroke-width: 1px;
    stroke: black;
    opacity: 1;    
}

.filledcountries {
    fill: #E0E0D1;
    stroke-width: 1px;
    stroke: black;
    opacity: 1;
}

.francelike {
    fill: steelblue;
    stroke-width: 2px;
    stroke: lightgray;
}

.roads {
    stroke: brown;
    stroke-width: 1px;
    fill: none;
}

.rivers {
    stroke: blue;
    stroke-width: 2px;
    fill: none;
    opacity: 1;
}

.thickborders {
    stroke: brown;
    stroke-width: 2px;
    fill: none;
}

circle {
    fill: black;
    stroke: red;
}

circle.pinkcircle {
    fill: pink;
    stroke: black;
    stroke-width: 1;
    opacity: 1
}

circle.greencircle {
    fill: green;
    stroke: red;
    opacity: 1;
    stroke-width: 3;
}

  #infoBox {
    position: fixed;
    z-index: 1;
    bottom: 150px;
    right: 150px;
    background: white;
    border: 1px gray dashed;
    padding:20px;
    width: 200px;
  }

index.html

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
  <title>d3.carto.map - Center on a Point</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("http://bl.ocks.org/emeeks/raw/c970c9ee3e242e90004b/sample_routes.topojson","TopoJSON","roads","svg","all");
    map.addCSVLayer("http://bl.ocks.org/emeeks/raw/c970c9ee3e242e90004b/sample_points.csv","CSV Points","pinkcircle",2,"svg","x","y");

  }
</script>
<body onload="makeSomeMaps()">
<div id="map"></div>
<footer>
<script src="http://d3js.org/d3.v3.min.js" charset="utf-8" type="text/javascript"></script>
<script src="http://d3js.org/topojson.v1.min.js" type="text/javascript">
</script>
<script src="http://d3js.org/d3.geo.projection.v0.min.js" type="text/javascript">
</script>
<script src="http://d3js.org/colorbrewer.v1.min.js"></script>
<script src="http://bl.ocks.org/emeeks/raw/f3105fda25ff785dc5ed/tile.js" type="text/javascript">
</script>
<script src="http://bl.ocks.org/emeeks/raw/f3105fda25ff785dc5ed/d3.quadtiles.js" type="text/javascript">
</script>
<script src="http://bl.ocks.org/emeeks/raw/f3105fda25ff785dc5ed/d3.geo.raster.js" type="text/javascript">
</script>
<script src="https://rawgit.com/emeeks/d3-carto-map/master/d3.carto.map.js" type="text/javascript">
</script>
</footer>
</body>
</html>

thumbnail.png