我有TopoJSON文件,它看起来像这样:
{"type":"Topology","transform":{"scale":[0.03600360003702599,0.0040674580654071245],"translate":[-179.9999967702229,41.18684289776669],"objects":{"country":{"type":"GeometryCollection","geometries":[{"type":"Polygon","arcs":[[0]],"properties":{"AREA":29809500,"PERIMETER":21822.4,"region":"XYZ"}},…
我想在我的d3.js代码中使用属性值("AREA","PERIMETER","region").我试图获得一些值,但它不起作用:
d3.json("map_topo.json", function(error, map) {
svg.append("path")
.datum(topojson.object(map, map.objects.country).geometries)
.attr("d", path)
.style("fill", function(d) {
if (d.properties.region == "XYZ")
{return "red"}
else {return "gray"}
})
我做错了什么？
UPD:问题是在@ChrisWilson的帮助下解决的,问题在于追加一条路径,而不是选择所有路径.工作代码(对于topojson.v0.js):
d3.json("map_topo.json", function(error, map) {
svg.selectAll("path")
.data(topojson.object(map, map.objects.country).geometries)
.enter().append("path")
.attr("d", path)
.style("fill", function(d) {
if (d.properties.region == "XYZ")
{return "red"}
else {return "gray"}
});
对于topojson.v1.js使用topojson.feature方法(请看下面的评论).
我在合并代码,代码依赖于v1上的v0中断.
topojson.v0.min.js和topojson.v1.min.js之间的语法更改是什么？*
-
可疑语法列表: