1
私はD3を初めて使っています。私がする必要があるもの：D3の地図：パスのグループにズーム
- 単一の状態のマップを作成します。
- 郡の罫線を表示する必要があります。
- 州地域北、南、東、西&中央は異なる色で塗りつぶさなければなりません。各地域は郡で構成されています。
- ユーザーが領域をクリックすると、マップはその領域を拡大する必要があります。
ここまで達成できたこと： 私には最初の3つの要件があります。問題は、私が郡をクリックすると、その地域の代わりにその郡にズームすることです。
私が書いたコードは、以下の実施例から基づいています。
ズームバウンディングボックスへ
https://bl.ocks.org/mbostock/4699541
クリップされた郡でNY州
https://bl.ocks.org/gregdevs/a73f8a16f129757c037e72ecdebdd8f2
の一部のみ自分で作成したコード（そして変更が必要な部分）は、regの色付けですイオン。これはif then else statemenentsを使用して次のクラスを設定して行われました。
.attr('class', function (d) {
if (d.id == "51105" || d.id == "51169" || d.id == "51191" || d.id == "51520" || d.id == "51077" || d.id == "51035" ||
d.id == "51141" || d.id == "51089" || d.id == "51143" || d.id == "51590" || d.id == "51195" || d.id == "51051" ||
d.id == "51027" || d.id == "51167" || d.id == "51185" || d.id == "51173" || d.id == "51021" || d.id == "51197" ||
d.id == "51071" || d.id == "51590" || d.id == "51155" || d.id == "51063" || d.id == "51067" || d.id == "51121" ||
d.id == "51161" || d.id == "51770") {
return "WesternRegion";
}
else if (d.id == "51083" || d.id == "51117" || d.id == "51025" || d.id == "51081" || d.id == "51037" || d.id == "51011" ||
d.id == "51590" || d.id == "51029" || d.id == "51049" || d.id == "51145" || d.id == "51041" || d.id == "51111" ||
d.id == "51147" || d.id == "51183" || d.id == "51181" || d.id == "51007" || d.id == "51135" || d.id == "51053" ||
d.id == "51149" || d.id == "51087" || d.id == "51760") {
return "SouthernRegion";
}
else if (d.id == "51175" || d.id == "51800" || d.id == "51550" || d.id == "51810" || d.id == "51710" || d.id == "51093" ||
d.id == "51001" || d.id == "51131") {
return "EasternRegion";
}
else if (d.id == "51165" || d.id == "51171" || d.id == "51069" || d.id == "51043" || d.id == "51107" || d.id == "51059" ||
d.id == "51013" || d.id == "51510" || d.id == "51139" || d.id == "51187" || d.id == "51157" || d.id == "51061" || d.id == "51153") {
return "NorthernRegion";
}
else return "CentralRegion";
})
;
以下は完全なコードです。それを有効にするには、https://bl.ocks.org/mbostock/raw/4090846/us.jsonからus.jsonをダウンロードし、それをscriptsというフォルダにコピーする必要があります。以下は
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.outline {
stroke: #000;
stroke-width: 1.5px;
}
path {
fill: #ccc;
stroke: #fff;
stroke-width: .5px;
}
.background {
fill: none;
pointer-events: all;
}
.feature {
fill: #ccc;
cursor: pointer;
}
.county.active {
fill: orange !important;
}
.WesternRegion
{
fill:Green;
}
.EasternRegion
{
fill:Blue;
}
.SouthernRegion
{
fill:#efce43;
}
.NorthernRegion
{
fill:Purple;
}
.mesh {
fill: none;
stroke: #fff;
stroke-linecap: round;
stroke-linejoin: round;
}
</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script src="//d3js.org/topojson.v1.min.js"></script>
<script>
var width = 960,
height = 500;
active = d3.select(null);
var projection = d3.geo.albers()
.scale(1000)
.translate([width/2, height/2]);
var path = d3.geo.path()
.projection(projection);
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
svg.append("rect")
.attr("class", "background")
.attr("width", width)
.attr("height", height)
.on("click", reset);
var g = svg.append("g")
.style("stroke-width", "1.5px");
d3.json("/Scripts/us.json", function (error, us) {
if (error) throw error;
var states = topojson.feature(us, us.objects.states),
state = states.features.filter(function (d) { return d.id === 51; })[0];
projection.scale(1)
.translate([0, 0]);
var b = path.bounds(state),
s = .95/Math.max((b[1][0] - b[0][0])/width, (b[1][1] - b[0][1])/height),
t = [(width - s * (b[1][0] + b[0][0]))/2, (height - s * (b[1][1] + b[0][1]))/2];
projection.scale(s)
.translate(t);
g.selectAll("path")
.datum(topojson.mesh(us, us.objects.states, function (a, b) { return a !== b; }))
.attr("class", "mesh")
.attr("d", path)
.on("click", clicked);
g.append("path")
.datum(state)
.attr("class", "outline")
.attr("d", path)
.attr('id', 'land');
g.append("clipPath")
.attr("id", "clip-land")
.append("use")
.attr("xlink:href", "#land");
g.selectAll("path")
.data(topojson.feature(us, us.objects.counties).features)
.enter().append("path")
.attr("d", path)
.attr('countyId', function (d) {
return d.id
})
.attr("clip-path", "url(#clip-land)")
.on("click", clicked)
.attr('class', function (d) {
if (d.id == "51105" || d.id == "51169" || d.id == "51191" || d.id == "51520" || d.id == "51077" || d.id == "51035" ||
d.id == "51141" || d.id == "51089" || d.id == "51143" || d.id == "51590" || d.id == "51195" || d.id == "51051" ||
d.id == "51027" || d.id == "51167" || d.id == "51185" || d.id == "51173" || d.id == "51021" || d.id == "51197" ||
d.id == "51071" || d.id == "51590" || d.id == "51155" || d.id == "51063" || d.id == "51067" || d.id == "51121" ||
d.id == "51161" || d.id == "51770") {
return "WesternRegion";
}
else if (d.id == "51083" || d.id == "51117" || d.id == "51025" || d.id == "51081" || d.id == "51037" || d.id == "51011" ||
d.id == "51590" || d.id == "51029" || d.id == "51049" || d.id == "51145" || d.id == "51041" || d.id == "51111" ||
d.id == "51147" || d.id == "51183" || d.id == "51181" || d.id == "51007" || d.id == "51135" || d.id == "51053" ||
d.id == "51149" || d.id == "51087" || d.id == "51760") {
return "SouthernRegion";
}
else if (d.id == "51175" || d.id == "51800" || d.id == "51550" || d.id == "51810" || d.id == "51710" || d.id == "51093" ||
d.id == "51001" || d.id == "51131") {
return "EasternRegion";
}
else if (d.id == "51165" || d.id == "51171" || d.id == "51069" || d.id == "51043" || d.id == "51107" || d.id == "51059" ||
d.id == "51013" || d.id == "51510" || d.id == "51139" || d.id == "51187" || d.id == "51157" || d.id == "51061" || d.id == "51153") {
return "NorthernRegion";
}
else return "CentralRegion";
})
;
});
function clicked(d) {
// debugger;
if (d3.select(this).classed("NorthernRegion")) {
alert("You selected Northern Region");
}
else if (d3.select(this).classed("SouthernRegion")) {
alert("You selected Southern Region");
}
else if (d3.select(this).classed("EasternRegion")) {
alert("You selected Eastern Region");
}
else if (d3.select(this).classed("WesternRegion")) {
alert("You selected Western Region");
}
else if (d3.select(this).classed("CentralRegion")) {
alert("You selected Central Region");
}
if (active.node() === this) return reset();
active.classed("active", false);
active = d3.select(this).classed("active", true);
var bounds = path.bounds(d ),
dx = bounds[1][0] - bounds[0][0],
dy = bounds[1][1] - bounds[0][1],
x = (bounds[0][0] + bounds[1][0])/2,
y = (bounds[0][1] + bounds[1][1])/2,
scale = .9/Math.max(dx/width, dy/height),
translate = [width/2 - scale * x, height/2 - scale * y];
g.transition()
.duration(750)
.style("stroke-width", 1.5/scale + "px")
.attr("transform", "translate(" + translate + ")scale(" + scale + ")");
}
function reset() {
active.classed("active", false);
active = d3.select(null);
g.transition()
.duration(750)
.style("stroke-width", "1.5px")
.attr("transform", "");
}
</script>
マップがどのように見えるかです： 
問題は、それが郡いない領域にズームすることです：すべての 
私の答えに近い！あなたはいつも私の解決策を見ていると、なぜ1つの郡が引き続きフィルタリングされているのでしょうか？ – Nick