Forked from Sumbera/L.CanvasOverlay.js
-
-
Save kkdd/b8ec235d76883f6c23e09305472fd842 to your computer and use it in GitHub Desktop.
Leaflet map: Canvas Overlay for Leaflet 1.x
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
<!doctype html> | |
<html> | |
<head> | |
<title>Many Points with leaflet Canvas</title> | |
<meta charset="utf-8"> | |
<style> | |
html, body { | |
height: 100%; | |
padding: 0; | |
margin: 0; | |
background: rgb(14, 21, 30); | |
height: 100%; | |
} | |
#map { | |
position: absolute; | |
height: 100%; | |
width: 100%; | |
background-color: #333; | |
} | |
</style> | |
</head> | |
<body> | |
<div id="map"></div> | |
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.7.1/dist/leaflet.css"/> | |
<script src="https://unpkg.com/leaflet@1.7.1/dist/leaflet.js"></script> | |
<!-- | |
<link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.7.2/leaflet.css" /> | |
<script src="http://cdn.leafletjs.com/leaflet-0.7.2/leaflet.js"></script> | |
--> | |
<script src="L.CanvasOverlay.js"></script> | |
<script src="http://www.sumbera.com/gist/data.js" charset="utf-8"></script> | |
<script> | |
var points = data; // data loaded from data.js | |
var leafletMap = L.map('map').setView([50.00, 14.44], 9); | |
L.tileLayer("http://{s}.sm.mapstack.stamen.com/(toner-lite,$fff[difference],$fff[@23],$fff[hsl-saturation@20])/{z}/{x}/{y}.png") | |
.addTo(leafletMap); | |
L.canvasOverlay() | |
.drawing(drawingOnCanvas) | |
.addTo(leafletMap); | |
function drawingOnCanvas(canvasOverlay, params) { | |
var ctx = params.canvas.getContext('2d'); | |
ctx.clearRect(0, 0, params.canvas.width, params.canvas.height); | |
ctx.fillStyle = "rgba(255,116,0, 0.2)"; | |
for (var i = 0; i < data.length; i++) { | |
var d = data[i]; | |
if (params.bounds.contains([d[0], d[1]])) { | |
dot = canvasOverlay._map.latLngToContainerPoint([d[0], d[1]]); | |
ctx.beginPath(); | |
ctx.arc(dot.x, dot.y, 3, 0, Math.PI * 2); | |
ctx.fill(); | |
ctx.closePath(); | |
} | |
} | |
}; | |
</script> | |
</body> | |
</html> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
updated for
leaflet@1.7