vai*_*hah 14 javascript leaflet
在我的项目中,我使用传单来显示点.
我从我的数据库获取地址,并希望显示该特定地址的要点.
根据提供的地址,我没有找到任何可以给我经纬度的东西.
谁可以帮我这个事？
snk*_*his 10
已经为Leaflet开发了一个很棒的地理编码器.
https://github.com/smeijer/L.GeoSearch
您可以轻松使用结果
map.on('geosearch_showlocation', function (result) {
L.marker([result.x, result.y]).addTo(map)
});
mov*_*13h 10
如果你想使用OpenStreetmaps,你可以简单地发出一个请求(使用jquery):
$.get(location.protocol + '//nominatim.openstreetmap.org/search?format=json&q='+address, function(data){
console.log(data);
});
你将得到包含(不仅仅是)lat和lon的JSON对象.
解决方案，无需其他插件。仅传单和纯JavaScript。拖动标记或输入地址即可获得坐标。如果您对nominatim请求有疑问，只需将https更改为http。演示在这里：http: //yellowthailand.com/leafletgeo.html
<html>
<head>
<title>Leaflet Address Lookup and Coordinates</title>
<meta charset="utf-8">
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.3.1/dist/leaflet.css" />
<script src="https://unpkg.com/leaflet@1.3.1/dist/leaflet.js"></script>
<style type="text/css">
html, body { width:100%;padding:0;margin:0; }
.container { width:95%;max-width:980px;padding:1% 2%;margin:0 auto }
#lat, #lon { text-align:right }
#map { width:100%;height:50%;padding:0;margin:0; }
.address { cursor:pointer }
.address:hover { color:#AA0000;text-decoration:underline }
</style>
</head>
<body>
<div class="container">
<b>Coordinates</b>
<form>
<input type="text" name="lat" id="lat" size=12 value="">
<input type="text" name="lon" id="lon" size=12 value="">
</form>
<b>Address Lookup</b>
<div id="search">
<input type="text" name="addr" value="" id="addr" size="58" />
<button type="button" onclick="addr_search();">Search</button>
<div id="results"></div>
</div>
<br />
<div id="map"></div>
</div>
<script type="text/javascript">
// New York
var startlat = 40.75637123;
var startlon = -73.98545321;
var options = {
center: [startlat, startlon],
zoom: 9
}
document.getElementById('lat').value = startlat;
document.getElementById('lon').value = startlon;
var map = L.map('map', options);
var nzoom = 12;
L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {attribution: 'OSM'}).addTo(map);
var myMarker = L.marker([startlat, startlon], {title: "Coordinates", alt: "Coordinates", draggable: true}).addTo(map).on('dragend', function() {
var lat = myMarker.getLatLng().lat.toFixed(8);
var lon = myMarker.getLatLng().lng.toFixed(8);
var czoom = map.getZoom();
if(czoom < 18) { nzoom = czoom + 2; }
if(nzoom > 18) { nzoom = 18; }
if(czoom != 18) { map.setView([lat,lon], nzoom); } else { map.setView([lat,lon]); }
document.getElementById('lat').value = lat;
document.getElementById('lon').value = lon;
myMarker.bindPopup("Lat " + lat + "<br />Lon " + lon).openPopup();
});
function chooseAddr(lat1, lng1)
{
myMarker.closePopup();
map.setView([lat1, lng1],18);
myMarker.setLatLng([lat1, lng1]);
lat = lat1.toFixed(8);
lon = lng1.toFixed(8);
document.getElementById('lat').value = lat;
document.getElementById('lon').value = lon;
myMarker.bindPopup("Lat " + lat + "<br />Lon " + lon).openPopup();
}
function myFunction(arr)
{
var out = "<br />";
var i;
if(arr.length > 0)
{
for(i = 0; i < arr.length; i++)
{
out += "<div class='address' title='Show Location and Coordinates' onclick='chooseAddr(" + arr[i].lat + ", " + arr[i].lon + ");return false;'>" + arr[i].display_name + "</div>";
}
document.getElementById('results').innerHTML = out;
}
else
{
document.getElementById('results').innerHTML = "Sorry, no results...";
}
}
function addr_search()
{
var inp = document.getElementById("addr");
var xmlhttp = new XMLHttpRequest();
var url = "https://nominatim.openstreetmap.org/search?format=json&limit=3&q=" + inp.value;
xmlhttp.onreadystatechange = function()
{
if (this.readyState == 4 && this.status == 200)
{
var myArr = JSON.parse(this.responseText);
myFunction(myArr);
}
};
xmlhttp.open("GET", url, true);
xmlhttp.send();
}
</script>
</body>
</html>