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index.html
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<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
<title>経路探索テスト</title>
<link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.7.3/leaflet.css"/>
<script src="http://cdn.leafletjs.com/leaflet-0.7.3/leaflet.js"></script>
<script src="./lib/TileLayer.GeoJSON.js"></script>
<script src="./lib/turf.min.js"></script>
<script src="./lib/dijkstra/graph.js"></script>
<style>
body {padding: 0; margin: 0;}
html, body, #mapdiv {height: 100%; width: 100%;}
.leaflet-container {background: #fff;}
.gsi-div-icon {
background: none;
white-space: nowrap;
border:none;
}
</style>
</head>
<body>
<div id="mapdiv">
<script>
//道路中心線の両端nodeに付けるid
var nodeid = 0;
//道路中心線の両端座標にidを付けて取っておく
var nodes = {
type: "FeatureCollection",
features: []
};
var setNode = function(lng, lat) {
var id;
var node = turf.filter(nodes, "latlng", lat+"-"+lng);
if (node.features.length) {
id = node.features[0].properties.id;
} else {
id = nodeid++;
var newnode = {
type: "Feature",
properties: {
id: id,
latlng: lat+"-"+lng
},
geometry: {
type: "Point",
coordinates: [lng, lat]
}
};
nodes.features.push(newnode);
}
return id;
};
//経路探索用テーブル
var dijkstramap = {};
var dijkstrafeature = {};
var setDijkstraMap = function(sid, eid, length, feature) {
if (!(sid in dijkstramap)) {
dijkstramap[sid] = {};
dijkstrafeature[sid] = {};
}
dijkstramap[sid][eid] = length;
dijkstrafeature[sid][eid] = feature;
};
//マーカー移動後の経路探索
var markerDragEnd = function (e) {
//前回の結果を消去
shortestpathlayer.clearLayers();
//始点、終点マーカーレイヤからマーカー取得
var markers = markerlayer.getLayers();
//マーカー近傍のnodeを探索
var start = turf.nearest(markers[0].toGeoJSON(), nodes);
var end = turf.nearest(markers[1].toGeoJSON(), nodes);
//経路探索
var graph = new Graph(dijkstramap);
var shortestpath = graph.findShortestPath(start.properties.id, end.properties.id);
//探索結果から経路作成
var f = null;
for (var i=0; i<shortestpath.length-1; i++) {
if (shortestpath[i] in dijkstrafeature) {
if (shortestpath[i+1] in dijkstrafeature[shortestpath[i]]) {
f = dijkstrafeature[shortestpath[i]][shortestpath[i+1]];
shortestpathlayer.addData(f);
}
}
if (shortestpath[i+1] in dijkstrafeature) {
if (shortestpath[i] in dijkstrafeature[shortestpath[i+1]]) {
f = dijkstrafeature[shortestpath[i+1]][shortestpath[i]];
shortestpathlayer.addData(f);
}
}
}
};
//経路探索結果レイヤ
var shortestpathlayer = L.geoJson(null, {style: function(){return {"color": "#ff0000", "weight": 5};}, clickable:false});
//道路中心線レイヤ
var rdcllayer = new L.TileLayer.GeoJSON(
'http://cyberjapandata.gsi.go.jp/xyz/experimental_rdcl/{z}/{x}/{y}.geojson',
{minZoom: 16, maxNativeZoom: 16, maxZoom: 16},
{
style: function() {
return {"color": "#0000ff", "weight": 2};
},
onEachFeature: function (feature, layer) {
//経路探索時の重みとして経路長さを使用
var length = turf.lineDistance(feature, "kilometers");
//経路両端にidを付けて取っておく
var latlng = feature.geometry.coordinates;
feature.properties.sid = setNode(latlng[0][0],latlng[0][1]);
feature.properties.eid = setNode(latlng[latlng.length-1][0],latlng[latlng.length-1][1]);
//経路探索用のテーブルへ保存
setDijkstraMap(feature.properties.sid, feature.properties.eid, length, feature);
setDijkstraMap(feature.properties.eid, feature.properties.sid, length, feature);
}
}
);
//地理院地図レイヤ
var pale = L.tileLayer(
'http://cyberjapandata.gsi.go.jp/xyz/pale/{z}/{x}/{y}.png',
{attribution: "地理院タイル（淡色地図）", maxZoom: 18, opacity:1});
//始点、終点マーカーレイヤ
var markerdata = {
type: "FeatureCollection",
features: [
{ type: "Feature",
geometry: {"type": "Point", "coordinates": [142.368805, 43.771179]},
properties: {}
},
{ type: "Feature",
geometry: {"type": "Point", "coordinates": [142.368905, 43.771279]},
properties: {}
}
]
};
var markerlayer = L.geoJson(markerdata, {
pointToLayer: function(feature, latlng) {
return L.marker(latlng);
},
onEachFeature: function (feature, layer) {
layer.options.draggable = true;
layer.on('dragend', function(e){markerDragEnd(e);});
}
});
var map = L.map("mapdiv", {
center: [43.771179, 142.368805], zoom: 16,minZoom: 16, maxZoom: 16,
layers: [pale, rdcllayer, markerlayer, shortestpathlayer]});
</script>
</body>
</html>