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我一直在尝试使用d3映射some GeoJSON data,但尝试失败。试图映射geojson数据时,在svg路径'd'attr中获取NaN值
我认为我的代码生成一系列path
scg元素的具体问题,其d
属性最终包含NaN
值。这里有一个结果我得到的一个例子:
<path fill="#ccc" stroke="#333" d="MNaN,NaNLNaN,NaNLNaN,NaNLNaN,NaNLNaN,NaNLNaN,NaNLNaN,NaNLNaN,NaNLNaN,NaNLNaN,NaNLNaN,NaNLNaN,NaNLNaN,NaNLNaN,NaNLNaN,NaNLNaN,NaNLNaN,NaNLNaN,NaNLNaN,NaNLNaN,NaNLNaN,NaNLNaN,NaNLNaN,NaNZ">
</path>
这里是我的代码如下所示:
var width = 960;
var height = 960;
var dataUrl =
"https://gist.githubusercontent.com/ezmiller/35d6a354fa1da0bd076dfe7b74a30a7d/raw/9398ec491e0dc9b38f7f251e5c7bf90ad8b45779/2016-kings-county-pres-primary-35th.json";
var projection = d3.geoConicEqualArea()
.parallels([73.97369384765625, 40.64664205310956])
.rotate([89.5,0])
.fitSize([960, 960]);
var path = d3.geoPath().projection(projection);
var svg = d3
.select("body")
.append("svg")
.attr("width", width)
.attr("height", height);
var g = svg.append('g');
var mapLayer = g.append('g')
.classed('map-layer', true);
d3.json(dataUrl, function(err, data) {
if (err) throw err;
mapLayer.selectAll('path')
.data(data.features)
.enter()
.append('path')
.attr("fill", "#ccc")
.attr("stroke","#333")
.attr("d", path);
});
(这里是一个codepen)
我在做什么错在这里?