Question

我已经在几周内绘制了地图，但每次我都有这种geojson文件（Featurecollection）。 Basicaly为卡萨布兰卡的不同邻域的多个坐标数组（在我的例子中）

{＆＃34; type＆＃34;：＆＃34; FeatureCollection＆＃34;，＆＃34; crs＆＃34;：{＆＃34; type＆＃34;：＆＃34; name＆＃34;，＆＃34;属性＆＃34;：{ ＆＃34; name＆＃34;：＆＃34; urn：ogc：def：crs：OGC：1.3：CRS84＆＃34; }，＆＃34;功能＆＃34;：[{ ＆＃34;输入＆＃34;：＆＃34;功能＆＃34;，＆＃34;属性＆＃34;：{＆＃34;名称＆＃34;：＆＃34; sid elkhader＆＃34;，＆＃34; arrondissement＆＃34;：＆＃34; Hay Hassani＆＃34;，＆＃34; prefecture＆＃34;：＆＃34; Hay Hassani＆＃34;，＆＃34;人口＆＃34;：18930，＆＃34;地区＆＃34;：1616340.045}，＆＃34;几何＆＃34;：{ ＆＃34;输入＆＃34;：＆＃34;多边形＆＃34;，＆＃34;坐标＆＃34;：[ [ [-7.686476562432639,33.559325447129368]， [-7.690429687499997,33.557167523684669]， [-7.690712466572602,33.55630146957499]， [-7.69193172454834,33.557239049346535]， [-7.6959228515625,33.56135167528992]， [-7.696309089660644,33.561208630718284]， [-7.696545124053955,33.561494719624619]， [-7.697145938873291,33.561584122213503]， [-7.698111534118651,33.562549664276048]， [-7.696180343627932,33.56406947713436]， [-7.698715871374095,33.566658445267336]， [-7.697645503668443,33.567405785590324]， [-7.697098054802192,33.567712878788591]， [-7.696259117371391,33.568261506969215]， [-7.696011511349325,33.5683181977139]， [-7.697387200000034,33.570266599999982]， [-7.696740007740531,33.570256969950947]， [-7.695561836061942,33.570528261065235]， [-7.694268410063101,33.570921223641093]， [-7.693596744041679,33.571075056616195]， [-7.692447518598163,33.571143296338079]， [-7.69142000156123,33.571163408675481]， [-7.690155388704593,33.57138033300906]， [-7.689247978305328,33.571612665313971]， [-7.688806874513382,33.571727285593433]， [-7.688311409275937,33.571857958148009]， [-7.687409400000027,33.572054400000049]， [-7.687391678068598,33.572059961946792]， [-7.684979438782096,33.568718150423749]， [-7.683219909667969,33.565678661594823]， [-7.683406457011668,33.563482296958043]， [-7.683829534164441,33.562429900601146]， [-7.686476562432639,33.559325447129368] ]]}}，{＆＃34; type＆＃34;：＆＃34; Feature＆＃34;，＆＃34; properties＆＃34;：{＆＃34; name＆＃34;：＆＃34; nassim＆＃34 ;＆＃34; arrondissement＆＃34;：＆＃34; Hay Hassani＆＃34;，＆＃34; prefecture＆＃34;：＆＃34; Hay Hassani＆＃34;，＆＃34; Population＆＃34;：18898，＆＃34; area＆＃34;：4776317.152}，＆＃34;几何＆＃34;：{＆＃34;类型＆＃34;：＆＃34;多边形＆＃34;，＆＃34;坐标＆＃34;：[ [ [-7.665259712372787,33.530737914470194]， [-7.663579428308825,33.5378162517151]， [-7.660416146883682,33.53687582432655]， [-7.653830735645996,33.533727400613216]， [-7.653876700000025,33.5326443]， [-7.65348,33.531745500000149]， [-7.653190299999866,33.529947799999803]， [-7.652943599999785,33.528677899999671]， [-7.653615699999913,33.526604099999851]， [-7.653936200000107,33.525365200000174]， [-7.654509399999957,33.5241387]， [-7.655106500000205,33.522667000000347]， [-7.656280299999967,33.520306199999879]， [-7.656956199999512,33.519349099999339]， [-7.658114900000093,33.517926900000134]， [-7.658983900000114,33.516343700000149]， [-7.659490200000375,33.515535600000646]， [-7.6601104,33.5145457]， [-7.660947299999948,33.513347099999926]， [-7.662599500000061,33.511602700000104]， [-7.664262500000047,33.510654500000086]， [-7.666333199999984,33.509563099999966]， [-7.668178499999983,33.50827]， [-7.668900600000119,33.507543800000242]， [-7.669823299999847,33.506934599999816]， [-7.670733100000266,33.507059900000414]， [-7.673713600000018,33.50863970000001]， [-7.676073900000079,33.509053]， [-7.68223779133892,33.508502572767156]， [-7.684989189541704,33.508844023847608]， [-7.683734893798827,33.512559745083195]， [-7.675151824951172,33.519357925734134]， [-7.674551010131836,33.520717497758142]， [-7.671031951904296,33.524796085610056]， [-7.668800354003906,33.526441777122507]， [-7.668285369873048,33.528516734826688]， [-7.665259712372787,33.530737914470194] ]]}} ....

现在，因为我正在从openstreemap http://polygons.openstreetmap.fr/index.py导出geojson文件，我有特定城镇的geojson（GeometryCollection）类型（没有社区，只有城镇的形式）< / p>

{＆＃34;类型＆＃34;：＆＃34;的GeometryCollection＆＃34;＆＃34;几何结构＆＃34;：[{＆＃34;类型＆＃34;：＆＃34;的MultiPolygon＆＃34; ＆＃34;坐标＆＃34;：[[[[ - 5.9429266,35.745548300000003]，[ - 5.9379208,35.743288800000002]，[ - 5.9327023,35.7417388]，[ - 5.9272307,35.741231999999997]，[ - 5.9202848,35.741909499999998]，[ - 5.9166306,35.746408000000002]，[ - 5.9156028,35.7496942]，[ - 5.9046272,35.760035999999999]，[ - 5.9001726,35.762371000000002]，[ - 5.8900896,35.7656931]，[ - 5.8790518,35.756111199999999]，[ - 5.8770798,35.7525902]，[ - 5.8737711 ，35.745343900000002]，[ - 5.872858,35.742017500000003]，[ - 5.8727035,35.741004699999998]，[ - 5.8699858,35.732553199999998]，[ - 5.869492,35.731017299999998]，[ - 5.8673423,35.728874099999999]，[ - 5.8638447,35.7260068]，[ - 5.8619479， 35.7246934]，[ - 5.8556436,35.720934100000001]，[ - 5.8510603,35.719324399999998]，[ - 5.8464426,35.716996799999997]，[ - 5.8434943,35.714585599999999]，[ - 5.8387091,35.711292700000001] ....

以下是我的问题：

当我尝试使用Geometrycollection geojson类型绘制地图时，我有一个带有空白点的巨大正方形，是因为我只有1个单一坐标数组而不是像第一个例子???
如何构建新的geojson文件以将Geomtrycollection的坐标用于FeatureCollection（因为它仅适用于该类型）???

我一直在搜索Tip 1和Tip 2以及此处Tip 3 但我无法找到答案

感谢y＆＃39;所有人的帮助

Answer 1

我无法渲染Test.json文件，因此我使用mapshaper将其转换为我们实际可以阅读的GeoJSON。然后使用d3中的新特权来获取地理数据fitSize是惊人的，并负责处理GeoJSON的所有居中和测量。

 #Test.json transformed
 {
     "type":"FeatureCollection",
     "features":[
     {
         "type":"Feature",
         "properties":{

         },
         "geometry":{
             "type":"Polygon",
             "coordinates":[

你的逻辑很好:)只使用新的d3方法。

  d3.json(fichier, function(json) {
    var projection = d3.geoMercator().fitSize([w, h], json);
    var path = d3.geoPath().projection(projection);
    svg.selectAll('path')
      .data(json.features)
      .enter()
      .append('path')
      .attr('d', path)
      .style("fill", "red")
      .style("stroke-width", "1")
      .style("stroke", "black")
      .on("mouseover", function(d) {
        //console.log(d);
      });
  });

这是更新的plnkr http://plnkr.co/edit/MHsC4J2xFC0nrHXSZQGQ?p=preview

D3js Map：GeometryCollection与FeaturesCollection

1 个答案: