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index.html
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<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
margin: 0;
}
path {
fill: none;
stroke: red;
stroke-linejoin: round;
stroke-width: 1.5px;
}
</style>
<body>
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-alpha/css/bootstrap.css">
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.0.0/jquery.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/tether/1.3.2/js/tether.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-alpha/js/bootstrap.min.js"></script>
<script src="//d3js.org/d3.v4.0.0-alpha.50.min.js"></script>
<script src="//d3js.org/d3-scale-chromatic.v0.3.min.js"></script>
<script src="//d3js.org/topojson.v1.min.js"></script>
<script src="//d3js.org/d3-tile.v0.0.min.js"></script>
<script>
var width = Math.max(960, window.innerWidth),
height = Math.max(500, window.innerHeight),
stationColor = d3.scaleSequential(d3.interpolateOranges),
stationSize = 10,
namesToAdd = {
T: "Temperature"
},
namesToOmit =["id","latitude","longitude","address","projected"];
var tile = d3.tile()
.size([width, height]);
var projection = d3.geoMercator()
.scale((1 << 12) / 2 / Math.PI)
.translate([width / 2, height / 2]);
var center = projection([-100, 40]);
var path = d3.geoPath()
.projection(projection);
var zoom = d3.zoom()
.on("zoom", zoomed);
// With the center computed, now adjust the projection such that
// it uses the zoom behavior’s translate and scale.
projection
.scale(1 / 2 / Math.PI)
.translate([0, 0]);
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
var raster = svg.append("g")
.attr("opacity", 0.4);
var vector = svg.append("g");
var legend = svg.append("g")
.attr("transform", "translate(10, 10)");
svg.call(zoom);
// Zoom into Bangalore.
svg.call(zoom.transform, d3.zoomIdentity
.translate(-41951.175, 7402.282)
.scale(198668));
zoomed();
function zoomed() {
var transform = d3.zoomTransform(svg.node());
var tiles = tile
.scale(transform.k)
.translate([transform.x, transform.y])
();
vector.attr("transform", transform);
var image = raster
.attr("transform", "scale(" + tiles.scale + ")translate(" + tiles.translate + ")")
.selectAll("image")
.data(tiles, function(d) { return d; });
image.exit()
.remove();
image.enter().append("image")
// .attr("xlink:href", function(d) { return "http://a.tile.openstreetmap.org/" + d[2] + "/" + d[0] + "/" + d[1] + ".png"; })
.attr("xlink:href", function(d) { return "http://stamen-tiles-a.a.ssl.fastly.net/toner-lite/" + d[2] + "/" + d[0] + "/" + d[1] + ".png"; })
.attr("width", 1)
.attr("height", 1)
.attr("x", function(d) { return d[0]; })
.attr("y", function(d) { return d[1]; });
vector.selectAll("circle")
.attr("r", stationSize / transform.k);
console.log(stationSize / transform.k);
}
d3.json("data.json", function (data){
var transform = d3.zoomTransform(svg.node());
data = data.result.map(type);
data = data.filter(function (d){return d.T;})
stationColor.domain(d3.extent(data,function(d){return d.T;}));
vector.selectAll("circle").data(data).enter().append("circle")
.attr("fill", function(d){return stationColor(d.T)})
.attr("cx", function (d){ return d.projected[0]; })
.attr("cy", function (d){ return d.projected[1]; })
.attr("r", stationSize / transform.k)
.on("mouseenter",function(d){
// console.log(Object.keys(d).join("\n"));
//$(this).popover({ content : String(d.T) })
$(this).popover({
content : Object.keys(d)
.filter(function(key){ return namesToOmit.indexOf(key)==-1})
.map(function(key){
var name = (key in namesToAdd) ? namesToAdd[key] : key;
return "<strong>" + name +" : </strong>" + d[key]
})
.join("<br>") ,
html : true ,
title : "<strong>" + d.address +"</strong>"
})
$(this).popover("show")
}) //mouseevent
.on("mouseleave",function(d){
$(this).popover("hide")
})
var legendBackground = legend.append("rect")
.attr("width", 90)
.attr("height", 190)
.attr("rx", 10)
.attr("ry", 10)
.attr("fill", "white")
.attr("opacity", 0.8);
var legendEntries = legend.selectAll(".legend-entry")
.data(stationColor.ticks().reverse())
.enter().append("g")
.attr("class", "legend-entry")
.attr("transform", function(d, i) {
return "translate(10," + (10 + i * 25) + ")";
});
legendEntries.append("rect")
.attr("width", 20)
.attr("height", 20)
.attr("fill", stationColor);
legendEntries.append("text")
.attr("x", 26)
.attr("y", 10)
.attr("dy", ".35em")
.text(function (d){ return d + " °C"; });
});
function type(d){
d.T = +d.T;
d.projected = projection([ +d.longitude,+d.latitude]);
return d;
}
d3.select(self.frameElement).style("height", height + "px");
</script>