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ユーザーの現在地を示すページを作成します。 ビルドしたい機能は、ユーザーがマップ上の任意の場所を選択できることです。スクリプトは、自分の場所とクリックされた場所の間の距離を計算します。Mapboxマーカーを現在地に表示するにはどうすればいいですか?
達成されたこと:ウェブサイトは場所を示し、ユーザーはクリックして2番目のマーカーを挿入できます。
問題:最初のマーカーがユーザーの現在の場所に表示されるはずです。
既に持っているコード: JSfiddle
<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>Distance between two markers</title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<script src='https://api.mapbox.com/mapbox.js/v2.4.0/mapbox.js'></script>
<link href='https://api.mapbox.com/mapbox.js/v2.4.0/mapbox.css' rel='stylesheet' />
<style>
body { margin:0; padding:0; }
#map { position:absolute; top:0; bottom:0; width:100%; }
</style>
</head>
<body>
<style>
pre.ui-distance {
position:absolute;
bottom:10px;
left:10px;
padding:5px 10px;
background:rgba(0,0,0,0.5);
color:#fff;
font-size:11px;
line-height:18px;
border-radius:3px;
}
.ui-button {
background:#3887BE;
color:#FFF;
display:block;
position:absolute;
top:50%;left:50%;
width:160px;
margin:-20px 0 0 -80px;
z-index:100;
text-align:center;
padding:10px;
border:1px solid rgba(0,0,0,0.4);
border-radius:3px;
}
.ui-button:hover {
background:#3074a4;
color:#fff;
}
</style>
<div id='map'></div>
<div class='ui-button'>
<a href='#' id='geolocate' >Find me</a>
<pre id='distance' class='ui-distance'>Click to place a marker</pre>
<script>
L.mapbox.accessToken = 'pk.eyJ1IjoiYWJ6YWwiLCJhIjoiY2llempiaW9oMWJvdXNnbTAxZnY4NTNvOSJ9.I0bW1wxrOYS2MPZD0FrTtA';
var map = L.mapbox.map('map', 'mapbox.streets')
.setView([38.9, -77], 12);
// Start with a fixed marker.
var fixedMarker = L.marker(new L.LatLng(38.9131775, -77.032544), {
icon: L.mapbox.marker.icon({
'marker-color': 'ff8888'
})
}).bindPopup('Mapbox DC').addTo(map);
// Store the fixedMarker coordinates in a variable.
var fc = fixedMarker.getLatLng();
// Create a featureLayer that will hold a marker and linestring.
var featureLayer = L.mapbox.featureLayer().addTo(map);
// When a user clicks on the map we want to
// create a new L.featureGroup that will contain a
// marker placed where the user selected the map and
// a linestring that draws itself between the fixedMarkers
// coordinates and the newly placed marker.
map.on('click', function(ev) {
// ev.latlng gives us the coordinates of
// the spot clicked on the map.
var c = ev.latlng;
var geojson = [
{
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [c.lng, c.lat]
},
"properties": {
"marker-color": "#ff8888"
}
}, {
"type": "Feature",
"geometry": {
"type": "LineString",
"coordinates": [
[fc.lng, fc.lat],
[c.lng, c.lat]
]
},
"properties": {
"stroke": "#000",
"stroke-opacity": 0.5,
"stroke-width": 4
}
}
];
featureLayer.setGeoJSON(geojson);
// Finally, print the distance between these two points
// on the screen using distanceTo().
var container = document.getElementById('distance');
container.innerHTML = (fc.distanceTo(c)).toFixed(0) + 'm';
});
var geolocate = document.getElementById('geolocate');
if (!navigator.geolocation) {
geolocate.innerHTML = 'Geolocation is not available';
} else {
geolocate.onclick = function (e) {
e.preventDefault();
e.stopPropagation();
map.locate();
};
}
// Once we've got a position, zoom and center the map
// on it, and add a single marker.
map.on('locationfound', function(e) {
map.fitBounds(e.bounds);
myLayer.setGeoJSON({
type: 'Feature',
geometry: {
type: 'Point',
coordinates: [e.latlng.lng, e.latlng.lat]
},
properties: {
'title': 'Here I am!',
'marker-color': '#ff8888',
'marker-symbol': 'star'
}
});
// And hide the geolocation button
geolocate.parentNode.removeChild(geolocate);
});
// If the user chooses not to allow their location
// to be shared, display an error message.
map.on('locationerror', function() {
geolocate.innerHTML = 'Position could not be found';
});
</script>
</body>
</html>
要するに問題:38.9131775の最初のマーカーを示し、-77.032544は、ユーザの位置に表示されるべきです。 –