Built with blockbuilder.org
Last active
February 22, 2017 08:43
-
-
Save wazaahhh/3a4387fbb720b5e119a0a68a36b114ed to your computer and use it in GitHub Desktop.
geneva d3.js openstreetmap
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
license: mit |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
body { | |
margin: 0; | |
} | |
.map { | |
position: relative; | |
overflow: hidden; | |
} | |
.layer { | |
position: absolute; | |
will-change: transform; | |
} | |
.tile { | |
position: absolute; | |
width: 256px; | |
height: 256px; | |
} | |
.tile path { | |
fill: none; | |
stroke: #000; | |
stroke-linejoin: round; | |
stroke-linecap: round; | |
} | |
.tile .major_road { | |
stroke: #776; | |
} | |
.tile .minor_road { | |
stroke: #ccb; | |
} | |
.tile .highway { | |
stroke: #f39; | |
stroke-width: 1.5px; | |
} | |
.tile .rail { | |
stroke: #7de; | |
} | |
.info { | |
position: absolute; | |
bottom: 10px; | |
left: 10px; | |
} | |
</style> | |
<body> | |
<script src="//d3js.org/d3.v4.min.js"></script> | |
<script src="//d3js.org/d3-tile.v0.0.min.js"></script> | |
<script> | |
var pi = Math.PI, | |
tau = 2 * pi; | |
var width = Math.max(960, window.innerWidth), | |
height = Math.max(500, window.innerHeight); | |
// Initialize the projection to fit the world in a 1×1 square centered at the origin. | |
var projection = d3.geoMercator() | |
.scale(1 / tau) | |
.translate([0, 0]); | |
var path = d3.geoPath() | |
.projection(projection); | |
var tile = d3.tile() | |
.size([width, height]); | |
var zoom = d3.zoom() | |
.scaleExtent([1 << 20, 1 << 23]) | |
.on("zoom", zoomed); | |
var map = d3.select("body").append("div") | |
.attr("class", "map") | |
.style("width", width + "px") | |
.style("height", height + "px") | |
.on("mousemove", mousemoved); | |
var layer = map.append("div") | |
.attr("class", "layer"); | |
var info = map.append("div") | |
.attr("class", "info"); | |
// Compute the projected initial center. | |
var center = projection([6.143158, 46.204391]); | |
// Apply a zoom transform equivalent to projection.{scale,translate,center}. | |
map .call(zoom) | |
.call(zoom.transform, d3.zoomIdentity | |
.translate(width / 2, height / 2) | |
.scale(1 << 20) | |
.translate(-center[0], -center[1])); | |
function zoomed() { | |
var transform = d3.event.transform; | |
var tiles = tile | |
.scale(transform.k) | |
.translate([transform.x, transform.y]) | |
(); | |
projection | |
.scale(transform.k / tau) | |
.translate([transform.x, transform.y]); | |
var image = layer | |
.style("transform", stringify(tiles.scale, tiles.translate)) | |
.selectAll(".tile") | |
.data(tiles, function(d) { return d; }); | |
image.exit() | |
.each(function(d) { this._xhr.abort(); }) | |
.remove(); | |
image.enter().append("svg") | |
.attr("class", "tile") | |
.style("left", function(d) { return d[0] * 256 + "px"; }) | |
.style("top", function(d) { return d[1] * 256 + "px"; }) | |
.each(function(d) { this._xhr = render(d, this); }); | |
} | |
function render(d, node) { | |
return d3.json("https://vector.mapzen.com/osm/roads/" + d[2] + "/" + d[0] + "/" + d[1] + ".json?api_key=vector-tiles-LM25tq4", function(error, json) { | |
if (error) throw error; | |
var k = Math.pow(2, d[2]) * 256; // size of the world in pixels | |
d3.select(node).selectAll("path") | |
.data(json.features.sort(function(a, b) { return a.properties.sort_key - b.properties.sort_key; })) | |
.enter().append("path") | |
.attr("class", function(d) { return d.properties.kind; }) | |
.attr("d", d3.geoPath() | |
.projection(d3.geoMercator() | |
.scale(k / tau) | |
.translate([k / 2 - d[0] * 256, k / 2 - d[1] * 256]) | |
.precision(0))); | |
}); | |
} | |
function stringify(scale, translate) { | |
var k = scale / 256, r = scale % 1 ? Number : Math.round; | |
return "matrix3d(" + [k, 0, 0, 0, 0, k, 0, 0, 0, 0, k, 0, r(translate[0] * scale), r(translate[1] * scale), 0, 1 ] + ")"; | |
} | |
function mousemoved() { | |
info.text(formatLocation(projection.invert(d3.mouse(this)), d3.zoomTransform(this).k)); | |
} | |
function formatLocation(p, k) { | |
var format = d3.format("." + Math.floor(Math.log(k) / 2 - 2) + "f"); | |
return (p[1] < 0 ? format(-p[1]) + "°S" : format(p[1]) + "°N") + " " | |
+ (p[0] < 0 ? format(-p[0]) + "°W" : format(p[0]) + "°E"); | |
} | |
</script> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment