D3 の geo モジュールをいじっています。D3 の経験はありますが、geo モジュールを試すのはこれが初めてです。元は米国の地図( https://github.com/alignedleft/d3- book/edit/master/chapter_12/us-states.json )編集 (ファイルはhttps://github.com/alignedleft/d3-book/releases/tag/v1.0でダウンロード可能な zip に含まれるようになりました)albers プロジェクションで、インドの Geojson (以下の indiastates1.json) を取得するように変更されました。このコードは US ファイルではうまく機能しますが、インドの json ファイルでは何も表示されません。ここで何か不足していますか?どんな助けでも大歓迎です。ただし、投影法をメルカトルに変更しました。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>D3: Setting path fills</title>
<script type="text/javascript" src="../d3/d3.v3.js"></script>
<style type="text/css">
/* No style rules here yet */
</style>
</head>
<body>
<script type="text/javascript">
//Width and height
var w = 500;
var h = 300;
//Define map projection
var projection = d3.geo.mercator()
.translate([w/2, h/2])
.scale([500]);
//Define path generator
var path = d3.geo.path()
.projection(projection);
//Create SVG element
var svg = d3.select("body")
.append("svg")
.attr("width", w)
.attr("height", h);
//Load in GeoJSON data
d3.json("indiastates1.json", function(json) {
//Bind data and create one path per GeoJSON feature
svg.selectAll("path")
.data(json.features)
.enter()
.append("path")
.attr("d", path)
.style("fill", "steelblue");
});
</script>
</body>
</html>
indiastates1.json
{"type":"FeatureCollection","features":[
{"type":"Feature","id":"IND","properties":{"name":"India"},"geometry":{"type":"Polygon","coordinates":[[[77.837451,35.49401],[78.912269,34.321936],[78.811086,33.506198],[79.208892,32.994395],[79.176129,32.48378],[78.458446,32.618164],[78.738894,31.515906],[79.721367,30.882715],[81.111256,30.183481],[80.476721,29.729865],[80.088425,28.79447],[81.057203,28.416095],[81.999987,27.925479],[83.304249,27.364506],[84.675018,27.234901],[85.251779,26.726198],[86.024393,26.630985],[87.227472,26.397898],[88.060238,26.414615],[88.174804,26.810405],[88.043133,27.445819],[88.120441,27.876542],[88.730326,28.086865],[88.814248,27.299316],[88.835643,27.098966],[89.744528,26.719403],[90.373275,26.875724],[91.217513,26.808648],[92.033484,26.83831],[92.103712,27.452614],[91.696657,27.771742],[92.503119,27.896876],[93.413348,28.640629],[94.56599,29.277438],[95.404802,29.031717],[96.117679,29.452802],[96.586591,28.83098],[96.248833,28.411031],[97.327114,28.261583],[97.402561,27.882536],[97.051989,27.699059],[97.133999,27.083774],[96.419366,27.264589],[95.124768,26.573572],[95.155153,26.001307],[94.603249,25.162495],[94.552658,24.675238],[94.106742,23.850741],[93.325188,24.078556],[93.286327,23.043658],[93.060294,22.703111],[93.166128,22.27846],[92.672721,22.041239],[92.146035,23.627499],[91.869928,23.624346],[91.706475,22.985264],[91.158963,23.503527],[91.46773,24.072639],[91.915093,24.130414],[92.376202,24.976693],[91.799596,25.147432],[90.872211,25.132601],[89.920693,25.26975],[89.832481,25.965082],[89.355094,26.014407],[88.563049,26.446526],[88.209789,25.768066],[88.931554,25.238692],[88.306373,24.866079],[88.084422,24.501657],[88.69994,24.233715],[88.52977,23.631142],[88.876312,22.879146],[89.031961,22.055708],[88.888766,21.690588],[88.208497,21.703172],[86.975704,21.495562],[87.033169,20.743308],[86.499351,20.151638],[85.060266,19.478579],[83.941006,18.30201],[83.189217,17.671221],[82.192792,17.016636],[82.191242,16.556664],[81.692719,16.310219],[80.791999,15.951972],[80.324896,15.899185],[80.025069,15.136415],[80.233274,13.835771],[80.286294,13.006261],[79.862547,12.056215],[79.857999,10.357275],[79.340512,10.308854],[78.885345,9.546136],[79.18972,9.216544],[78.277941,8.933047],[77.941165,8.252959],[77.539898,7.965535],[76.592979,8.899276],[76.130061,10.29963],[75.746467,11.308251],[75.396101,11.781245],[74.864816,12.741936],[74.616717,13.992583],[74.443859,14.617222],[73.534199,15.990652],[73.119909,17.92857],[72.820909,19.208234],[72.824475,20.419503],[72.630533,21.356009],[71.175273,20.757441],[70.470459,20.877331],[69.16413,22.089298],[69.644928,22.450775],[69.349597,22.84318],[68.176645,23.691965],[68.842599,24.359134],[71.04324,24.356524],[70.844699,25.215102],[70.282873,25.722229],[70.168927,26.491872],[69.514393,26.940966],[70.616496,27.989196],[71.777666,27.91318],[72.823752,28.961592],[73.450638,29.976413],[74.42138,30.979815],[74.405929,31.692639],[75.258642,32.271105],[74.451559,32.7649],[74.104294,33.441473],[73.749948,34.317699],[74.240203,34.748887],[75.757061,34.504923],[76.871722,34.653544],[77.837451,35.49401]]]}}
]}