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lat lon grid.html
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lat lon grid.html
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<!DOCTYPE html>
<html>
<head>
<title>Leaflet1</title>
<meta charset="utf-8">
<link rel="stylesheet" href="https://unpkg.com/[email protected]/dist/leaflet.css"
integrity="sha512-xwE/Az9zrjBIphAcBb3F6JVqxf46+CDLwfLMHloNu6KEQCAWi6HcDUbeOfBIptF7tcCzusKFjFw2yuvEpDL9wQ=="
crossorigin=""/>
<script src="https://unpkg.com/[email protected]/dist/leaflet.js"
integrity="sha512-GffPMF3RvMeYyc1LWMHtK8EbPv0iNZ8/oTtHPx9/cc2ILxQ+u905qIwdpULaqDkyBKgOaB57QTMg7ztg8Jm2Og=="
crossorigin=""></script>
<!--<script src="https://cdnjs.com/libraries/leaflet-tilelayer-geojson"></script>-->
<style TYPE="text/css">
body {
margin: 0px;
padding: 0px;
}
/**
* 单独设置mapid为100%不显示，可能float坍塌
*/
html,
body,
#mapDiv {
height: 100%;
width: 100%;
}
</style>
</head>
<body>
<div id="mapDiv">
</div>
</body>
<script>
//地图地址
var url = 'https://api.tiles.mapbox.com/v4/{id}/{z}/{x}/{y}.png?access_token=pk.eyJ1IjoibWFwYm94IiwiYSI6ImNpejY4NXVycTA2emYycXBndHRqcmZ3N3gifQ.rJcFIG214AriISLbB6B5aw';
var attr = ' Map data © <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors, © <a href="http://cartodb.com/attributions">CartoDB</a>';
var leafletMap = L.map('mapDiv').setView([51.505, -0.09], 13);
//图层
L.tileLayer(url, {
maxZoom: 18,
attribution: attr,
id: 'mapbox.streets'
}).addTo(leafletMap);
//标记点
var tiles = new L.GridLayer();
tiles.createTile = function(coords) {
var tile = L.DomUtil.create('canvas', 'leaflet-tile');
// 上下文
var ctx = tile.getContext('2d');
var size = this.getTileSize();
tile.width = size.x
tile.height = size.y
// 将切片号乘以切片分辨率，默认为256pixel,得到切片左上角的绝对像素坐标
var nwPoint = coords.scaleBy(size)
// 根据绝对像素坐标，以及缩放层级，反投影得到其经纬度
var nw = leafletMap.unproject(nwPoint, coords.z)
ctx.fillStyle = 'white';
ctx.fillRect(0, 0, size.x, 50);
ctx.fillStyle = 'black';
ctx.fillText('x: ' + coords.x + ', y: ' + coords.y + ', zoom: ' + coords.z, 20, 20);
ctx.fillText('lat: ' + nw.lat + ', lon: ' + nw.lng, 20, 40);
ctx.strokeStyle = 'red';
ctx.beginPath();
ctx.moveTo(0, 0);
ctx.lineTo(size.x-1, 0);
ctx.lineTo(size.x-1, size.y-1);
ctx.lineTo(0, size.y-1);
ctx.closePath();
ctx.stroke();
return tile;
};
tiles.addTo(leafletMap)
</script>
</html>