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wboykinm/buildings.geojson

Created February 9, 2014 02:58
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leaflet.d3.js demo
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buildings.geojson
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index.html
<!doctype html>
<html>
<head>
<title>Leaflet.D3.js demo</title>
<script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>
<link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.6.4/leaflet.css" />
<!--[if lte IE 8]>
<link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.6.4/leaflet.ie.css" />
<![endif]-->
<script src="http://cdn.leafletjs.com/leaflet-0.6.4/leaflet.js"></script>
<script src="leaflet.d3.js"></script>
<style type='text/css'>
#svg-streets path {
fill:none;
stroke: rgba(0,0,0,0.3);
}
#svg-streets path:hover {
stroke: #0c0;
cursor: pointer;
}
#svg-streets .highway-residential { stroke-width: 1px; }
#svg-streets .highway-primary { stroke-width: 4px; }
#svg-streets .highway-secondary { stroke-width: 3px; }
#svg-streets .highway-tertiary { stroke-width: 2px; }
#svg-buildings path {
fill: rgba(0,0,0,0.3);
}
#svg-buildings path:hover {
fill: #00c;
cursor: pointer;
}
#svg-places path {
fill: yellow;
}
</style>
<script type='text/javascript'>
window.onload = function() {
var map = L.map('map',{
maxBounds: [[46.6412301,23.4324747],[46.9201137,23.8047838]]
}).fitBounds([[46.7412301, 23.53816],[46.76813, 23.59253]]);
L.tileLayer('http://a.tile.stamen.com/toner/{z}/{x}/{y}.png').addTo(map);
d3.json("streets.geojson", function(collection) {
var layer = new L.D3geoJSON(collection, {
id: 'svg-streets',
featureAttributes: {
'class': function(feature) {
return 'highway-' + feature.properties.highway;
}
},
}).addTo(map).on('click', function(e) {
console.log(e.data.properties.name);
});
});
d3.json("buildings.geojson", function(collection) {
var layer = new L.D3geoJSON(collection, {
id: 'svg-buildings',
}).addTo(map).on('click', function(e) {
console.log(e);
});
});
// d3.json("../buildings/temp-data/pins.json", function(collection) {
// var layer = new L.D3geoJSON(collection, {
// id: 'svg-places',
// }).addTo(map).on('click', function(e) {
// console.log(e);
// });
// });
};
</script>
</head>
<body>
<div id='map' style='position:absolute;top:0;left:0;right:0;bottom:0;'></div>
</body>
</html>
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leaflet.d3.js
L.D3geoJSON = L.Class.extend({
includes: L.Mixin.Events,
initialize: function(data, options) {
this.data = data;
this.options = options;
var that = this;
this._clickHandler = function(data, idx) {
that.fire('click', {
element: this,
data: data,
originalEvent: d3.event
});
};
},
onAdd: function(map) {
this._map = map;
this._first = true;
this._initZoomLvl = map._zoom;
this._svg = d3.select(this._map.getPanes().overlayPane).append('svg');
this._svg.attr('pointer-events', 'none');
this._group = this._svg.append('g');
this._group.attr('class', 'leaflet-zoom-hide ' + (this.options.className || ''));
if (this.options.id) {
this._svg.attr('id', this.options.id);
}
function latLngToPoint(latlng) {
return map.project(latlng)._subtract(map.getPixelOrigin());
};
var t = d3.geo.transform({
point: function(x, y) {
var point = latLngToPoint(new L.LatLng(y, x));
return this.stream.point(point.x, point.y);
}
});
this.path = d3.geo.path().projection(t);
this._feature = this._group.selectAll('path')
.data(this.data.features)
.enter()
.append('path')
.on('click', this._clickHandler);
this._map.on('viewreset', this.reset, this);
this._feature.attr('pointer-events', this.options.pointerEvents || 'visible');
if (this.options.featureAttributes) {
for (var i in this.options.featureAttributes) {
this._feature.attr(i, this.options.featureAttributes[i]);
}
}
this.reset();
},
onRemove: function(map) {
this._svg.remove();
this._map.off('viewreset', this.reset, this);
},
reset: function(e) {
if (!this._bounds) {
this._bounds = d3.geo.path().projection(null).bounds(this.data);
}
var topLeft = this._map.latLngToLayerPoint([this._bounds[0][1], this._bounds[0][0]]),
bottomRight = this._map.latLngToLayerPoint([this._bounds[1][1], this._bounds[1][0]]);
this._svg
.attr('width', bottomRight.x - topLeft.x)
.attr('height', topLeft.y - bottomRight.y)
.style('left', topLeft.x + 'px')
.style('top', bottomRight.y + 'px');
if (this._first) {
this._group.attr('transform', 'translate(' + -topLeft.x + ',' + -bottomRight.y + ')');
this._feature.attr('d', this.path);
this._initTopLeft = topLeft;
this._initBottomRight = bottomRight;
this._first = false;
} else {
var trans = d3.transform(this._group.attr('transform')),
oldScale = trans.scale;
trans.scale = [oldScale[0] * ((bottomRight.x - topLeft.x) / (this._oldBottomRight.x - this._oldTopLeft.x)),
oldScale[1] * ((topLeft.y - bottomRight.y) / (this._oldTopLeft.y - this._oldBottomRight.y))
];
trans.translate = [-this._initTopLeft.x, -this._initBottomRight.y];
this._group.attr('transform', 'scale('+trans.scale[0]+ ','+trans.scale[1]+')translate('+trans.translate[0] +',' + trans.translate[1] +')');
}
this._oldTopLeft = topLeft;
this._oldBottomRight = bottomRight;
this._svg.attr('class', 'zoom-' + this._map.getZoom());
},
addTo: function(map) {
map.addLayer(this);
return this;
}
});
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streets.geojson
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