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我一直在嘗試使用d3.js創建一個基本地圖,其中包含我下載的一個世界shapefile(ne_50m_admin_0_countries)。我一直試圖用各種不同的代碼嘗試並顯示它,但我總是以空白的HTML頁面結束。我是d3.js的新手,而且非常業餘。這是我一直在努力去工作的代碼,它是從http://bl.ocks.org/mbostock/4180634d3.js地圖不顯示
<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
background: #fcfcfa;
}
.stroke {
fill: none;
stroke: #000;
stroke-width: 3px;
}
.fill {
fill: #fff;
}
.graticule {
fill: none;
stroke: #777;
stroke-width: .5px;
stroke-opacity: .5;
}
.land {
fill: #222;
}
.boundary {
fill: none;
stroke: #fff;
stroke-width: .5px;
}
</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script src="//d3js.org/d3.geo.projection.v0.min.js"></script>
<script src="//d3js.org/topojson.v1.min.js"></script>
<script>
var width = 960,
height = 580;
var color = d3.scale.category10();
var projection = d3.geo.kavrayskiy7()
.scale(170)
.translate([width/2, height/2])
.precision(.1);
var path = d3.geo.path()
.projection(projection);
var graticule = d3.geo.graticule();
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
svg.append("defs").append("path")
.datum({type: "Sphere"})
.attr("id", "sphere")
.attr("d", path);
svg.append("use")
.attr("class", "stroke")
.attr("xlink:href", "#sphere");
svg.append("use")
.attr("class", "fill")
.attr("xlink:href", "#sphere");
svg.append("path")
.datum(graticule)
.attr("class", "graticule")
.attr("d", path);
d3.json("world-110.json", function(error, name) {
if (error) throw error;
var countries = topojson.feature(name, world.objects.countries).features,
neighbors = topojson.neighbors(world.objects.countries.geometries);
svg.selectAll(".country")
.data(name)
.enter().insert("path", ".graticule")
.attr("class", "country")
.attr("d", path)
.style("fill", function(d, i) { return color(d.color = d3.max(neighbors[i], function(n) { return countries[n].color; }) + 1 | 0); });
svg.insert("path", ".graticule")
.datum(topojson.mesh(name, world.objects.countries, function(a, b) { return a !== b; }))
.attr("class", "boundary")
.attr("d", path);
});
d3.select(self.frameElement).style("height", height + "px");
</script>
</body>
</html>
好像我的JSON是不是任何人的工作,但我正確地保存它通過QGIS。這是它的摘錄:
{"type":"Topology","transform":{"scale":[0.03600360036003601,0.017366249624962495],"translate":[-180,-90]},"objects":{"land":{"type":"MultiPolygon","arcs":[[[0]],[[1]],[[2]],[[3]],[[4]],[[5]],[[6]],[[
任何指導,以我可能做錯了將不勝感激。
我試過了,但它仍然不適合我!太令人沮喪了。這是我的系統可能有問題嗎?或者我如何下載json? –
JavaScript控制檯是否顯示任何消息? – gus27
你是否試圖驗證你的JSON?例如。這裏:http://jsonlint.com/ – gus27