Open in a new window for full screen. Only slightly modified from Ziggy Jonsson’s original.
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February 9, 2016 02:08
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Iceland Topography
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license: gpl-3.0 |
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
body { | |
margin: 0; | |
overflow: hidden; | |
} | |
.loading { | |
text-align: center; | |
margin: 80px; | |
} | |
div { | |
position: absolute; | |
font: 10px sans-serif; | |
background: #fff; | |
padding: 10px; | |
left: 0; | |
bottom: 0; | |
} | |
a { | |
color: #777; | |
} | |
path { | |
stroke: black; | |
stroke-linejoin: round; | |
stroke-width: 0.25px; | |
} | |
</style> | |
<p class="loading">Loading 3MB TopoJSON…</p> | |
<script src="//d3js.org/d3.v3.min.js"></script> | |
<script src="//d3js.org/topojson.v1.min.js"></script> | |
<script> | |
d3.json("/ZJONSSON/raw/4686541/flakar.json", function(error, topology) { | |
if (error) throw error; | |
var projection = d3.geo.mercator() | |
.center([-21.9333, 64.1333]) | |
.scale((1 << 16) / 2 / Math.PI); | |
var path = d3.geo.path() | |
.projection(projection); | |
var color = d3.scale.linear() | |
.domain([0, 900, 1100]) | |
.range(["green", "yellow", "white"]); | |
var zoom = d3.behavior.zoom() | |
.scaleExtent([1 / 4, 4]) | |
.on("zoom", zoomed); | |
var svg = d3.select("body").append("svg") | |
.call(zoom) | |
.append("g"); | |
var contour = svg.selectAll("path") | |
.data(topojson.feature(topology, topology.objects.flakar).features) | |
.enter().append("path") | |
.style("fill",function(d) { return color(d.properties.Z); }); | |
d3.select(window).on("resize", resized); | |
d3.select(".loading").remove(); | |
resized(); | |
function zoomed() { | |
svg.attr("transform", "translate(" + d3.event.translate + ")scale(" + d3.event.scale + ")"); | |
} | |
function resized() { | |
var width = window.innerWidth, height = window.innerHeight; | |
projection.translate([100, height - 100]); | |
svg.attr("width", width).attr("height", height); | |
contour.attr("d", path); | |
} | |
}); | |
</script> | |
<div>Underlying data © <a href="http://www.lmi.is">National Land Survey of Iceland</a> under the following <a href="http://www.lmi.is/wp-content/uploads/2013/01/GeneralTermsNLSI.pdf">Terms of Use</a>.</div> |
SVG needs width and height property, it's rendering in the default SVG size box for me on Chrome (Version 44.0.2403.89).
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What is the workflow from the GIS raster file to this geojson/topojson ?