[ Launch: Projections (merc,orth,stero) ] 82239a3008ad3092a136d70bd06a8e67 by jkeohan
[ Launch: Tributary inlet ] eae9e630e544c02b8433 by jkeohan
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Projections - Boundingbox\Centroid
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{"description":"Projections - Boundingbox\\Centroid","endpoint":"","display":"svg","public":true,"require":[{"name":"geo","url":"https://cdnjs.cloudflare.com/ajax/libs/d3-geo-projection/0.2.16/d3.geo.projection.js"},{"name":"geo","url":"https://cdnjs.cloudflare.com/ajax/libs/d3-geo-projection/0.2.16/d3.geo.projection.js"}],"fileconfigs":{"inlet.js":{"default":true,"vim":false,"emacs":false,"fontSize":12},"countries.json":{"default":true,"vim":false,"emacs":false,"fontSize":12},"_.md":{"default":true,"vim":false,"emacs":false,"fontSize":12},"config.json":{"default":true,"vim":false,"emacs":false,"fontSize":12}},"fullscreen":false,"play":false,"loop":false,"restart":false,"autoinit":true,"pause":true,"loop_type":"pingpong","bv":false,"nclones":15,"clone_opacity":0.4,"duration":3000,"ease":"linear","dt":0.01,"ajax-caching":true,"thumbnail":"http://i.imgur.com/Bq1hClk.png"} |
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var countries = tributary.countries | |
//console.log(countries.features) | |
var svg = d3.select('svg') | |
var canvas = canvasSize('svg') | |
//console.log(canvas) | |
//w = canvas[0] | |
//h = canvas[1] | |
w = 500; | |
h = 500; | |
//console.log(w,h) | |
//Create the following projections and determine the default properties for: | |
//-scale | |
//-center | |
//Define map projection | |
//function bounds(d) { | |
var b = d3.geo.bounds(countries) | |
console.log(b) | |
console.log((b[1][0] - b[0][0])/w) | |
console.log((b[1][1] - b[0][1])/h) | |
var s = .95 / Math.max( (b[1][0] - b[0][0])/w , (b[1][1] - b[0][1])/h ) | |
//console.log(s) | |
var t = [(w - s * (b[1][0] + b[0][0])/2) , ( h -s * (b[1][1] + b[0][1])/ 2) ] | |
//} | |
var projection = d3.geo.mercator() | |
.center([ 0, 0 ]) | |
.translate([ w/2, h/1.74026575872 ] | |
.scale(3) | |
//.scale([ w/9 ]) | |
/* | |
var projection = d3.geo.mollweide() | |
.center([ 0, 0 ]) | |
.translate([ w/2, h/1.74026575872 ]) | |
.scale([ 120 ]) | |
*/ | |
//var projection = d3.geo.orthographic() | |
//.center([ 0, 0 ]) | |
// .translate([ w/2, h/1.403440128 ]) | |
//.scale([ w/9 ]) | |
//var projection = d3.geo.stereographic() | |
//.center([ 100, -18 ]) | |
//.translate([ w/2, h/2.223049162752 ]) | |
//.scale([ w/9 ]) | |
//.rotate(50) | |
//Define path generator | |
var path = d3.geo.path() | |
.projection(projection); | |
//d3.json(countries) | |
svg.selectAll("path") | |
.data(countries.features) | |
.enter() | |
.append("path") | |
.attr("class","countries") | |
.attr("d", path); | |
//Load in GeoJSON data | |
function canvasSize(target) { | |
var height = parseFloat(d3.select(target).node().clientHeight) | |
var width = parseFloat(d3.select(target).node().clientWidth) | |
return [width,height] | |
}//canvasSize | |
d3.selectAll("path.countries") | |
.on("mouseover", centerBounds) | |
.on("mouseout", clearCenterBounds) | |
.on("click",zoomed) | |
function centerBounds(d,i) { | |
var thisBounds = path.bounds(d); | |
var thisCenter = path.centroid(d); | |
d3.select("svg") | |
.append("rect") | |
.attr("class", "bbox") | |
.attr("x", thisBounds[0][0]) | |
.attr("y", thisBounds[0][1]) | |
.attr("width", thisBounds[1][0] - thisBounds[0][0]) | |
.attr("height", thisBounds[1][1] - thisBounds[0][1]) | |
.style("fill", "none") | |
.style("stroke-dasharray", "5 5") | |
.style("stroke", "green") | |
.style("stroke-width", 2) | |
.style("pointer-events", "none"); | |
d3.select("svg") | |
.append("circle") | |
.attr("class", "centroid") | |
.style("fill", "red") | |
.attr("r", 5) | |
.attr("cx", thisCenter[0]).attr("cy", thisCenter[1]) | |
.style("pointer-events", "none"); | |
} | |
function clearCenterBounds() { | |
d3.selectAll("circle.centroid").remove(); | |
d3.selectAll("rect.bbox").remove(); | |
}; | |
var mapZoom = d3.behavior.zoom() | |
.translate(projection.translate()) | |
.scale(projection.scale()) | |
.on("zoom",zoomed ); | |
//d3.select('svg').call(mapZoom) | |
function zoomed() { | |
console.log(this) | |
projection.translate(mapZoom.translate()).scale(mapZoom.scale()); | |
d3.selectAll("path.countries").attr("d", path); | |
} |
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