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().
<html xmlns="//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("//bl.ocks.org/emeeks/raw/c970c9ee3e242e90004b/sample_routes.topojson","TopoJSON","roads","svg","all");
map.addCSVLayer("//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="//d3js.org/d3.v3.min.js" charset="utf-8" type="text/javascript"></script>
<script src="//d3js.org/topojson.v1.min.js" type="text/javascript">
</script>
<script src="//d3js.org/d3.geo.projection.v0.min.js" type="text/javascript">
</script>
<script src="//d3js.org/colorbrewer.v1.min.js"></script>
<script src="//bl.ocks.org/emeeks/raw/f3105fda25ff785dc5ed/tile.js" type="text/javascript">
</script>
<script src="//bl.ocks.org/emeeks/raw/f3105fda25ff785dc5ed/d3.quadtiles.js" type="text/javascript">
</script>
<script src="//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>
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;
}
.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;
}