{
"marker":[
{"lat":35.70930459186816,"lng":139.72034454345703,"name":"本部キャンパス"},
{"lat":35.70665619283589,"lng":139.7072982788086,"name":"大久保キャンパス"},
{"lat":35.698013436605755,"lng":139.7208595275879,"name":"河田町キャンパス"}
]
}
var map;
function initialize() {
if (GBrowserIsCompatible()) {
map = new GMap2(document.getElementById("map_canvas"));
map.setCenter(new GLatLng(35.70282282786898,139.71399307250976), 14);
GEvent.addListener(map, "click", createMarker);
}
}
function downloadData(){
GDownloadUrl("wdata.json", function dispData(data, statusCode){
var obj = eval("(" + data + ")");
for (var i = 0; i < obj.marker.length; i++) {
var lat = obj.marker[i].lat;
var lng = obj.marker[i].lng;
var name = obj.marker[i].name;
map.addOverlay(createMarker(lat, lng, name));
}
});
}
function createMarker(lat, lng, name) {
var marker = new GMarker(new GLatLng(lat, lng));
var html = "<p>" + name + "</p>";
GEvent.addListener(marker, "click", function(){
marker.openInfoWindowHtml(html);
});
return marker;
}
function createMarker(lat, lng, name) {
var marker = new GMarker(new GLatLng(lat, lng));
var html = "<p>" + name + "</p>";
GEvent.addListener(marker, "click", function(){
marker.openInfoWindowHtml(html);
});
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>JSON形式ファイルからのマーカー表示</title>
<script src="http://maps.google.com/maps?file=api&v=2&
key=(ここにGoogleMapsキーを入力)&sensor=false"
type="text/javascript" charset="utf-8"></script>
<script src="wjsonmapset.js" type="text/javascript"></script>
</head>
<body onload="initialize()" onunload="GUnload()">
<div id="map_canvas" style="width: 400px; height: 400px"></div>
<form>
<p>
<input type="button" id="btn" value="マーカーを表示" onclick="downloadData()" />
</p>
</form>
</body>
</html>