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我想在D3中显示WV的县级地图。我在网上找到了一个来自https://github.com/geary/polygonzo/tree/master/shapes/json的名为“wv-counties.json”的GeoJSON文件。当我看这个文件时,前几行如下:如何在D3中显示州县
{
"type": "FeatureCollection",
"properties":
{
"kind": "state",
"state": "wv"
},
"features": [
{"type":"Feature","bbox":[-80.2283,38.9446,-79.8121,39.3006],"properties":{"kind":"county","name":"Barbour","state":"wv","center":[-80.0202,39.1228],"centroid":[-80.0018,39.1309]},"geometry":{"type":"MultiPolygon","coordinates":[[[[-79.9764,39.2622],[-79.8942,39.3006],[-79.8121,39.2294],[-79.8230,39.1144],[-79.8942,38.9720],[-80.0859,38.9446],[-80.0531,38.9774],[-80.0531,39.0377],[-80.1297,39.0377],[-80.2283,39.1144],[-80.2228,39.1691],[-80.1681,39.2403]]]]}},
每个县都有一条线。
在我的javascript我有一句台词:
d3.json("wv-counties.json", function(error, wv)
之后,我可以打印WV对象到控制台,并看到它被装载。
我该如何去显示这个文件?
我已经试过这样:
svg.append("path")
.data(wv)
.attr("class", "county-border")
.attr("d", path);
但只是得到一个空白屏幕。
我也试过这样:
svg.append("path")
.datum(topojson.mesh(wv))
.attr("class", "county-border")
.attr("d", path);
但是,这会产生错误(最有可能的,因为该文件是不是TopoJSON文件)。
任何帮助表示赞赏。
我试过你的编辑,它开始成形。我看到输出,但线路不完全正确。尽管没有一些图像很难解释。我有可能在堆栈溢出处张贴一些截图吗? – user3018981
很高兴它越来越近......试试这个截图:http://meta.stackexchange.com/questions/91716/how-to-upload-screenshots – Peter
好吧,我现在正在取得进展。感谢帮助。原来,我需要你的编辑和更好的数据源。上面的编辑和来自http://eric.clst.org/Stuff/USGeoJSON的数据是解决方案。 – user3018981