I am trying to add a TIF file to my Mapbox GL JS code which is in html. I haven't found any relevant solution as to how I can add the file to my html code. Can anyone please tell me how to solve this? I need to upload the Georeferenced TIF file to my map in Mapbox GL JS.
Should I convert the TIF file to some other format? It will be better for me if I can upload the whole TIF file to Mapbox.
<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8' />
<title>Change a map's style</title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<script src='https://api.tiles.mapbox.com/mapbox-gl-js/v1.2.1/mapbox-gl.js'></script>
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v1.2.1/mapbox-gl.css' rel='stylesheet' />
<style>
body { margin:0; padding:0; }
#map { position:absolute; top:0; bottom:0; width:100%; }
</style>
</head>
<body>
<style type='text/css'>
#info {
display: block;
position: relative;
margin: 0px auto;
width: 30%;
padding: 8px;
border: none;
border-radius: 3px;
font-size: 14px;
text-align: center;
color: #222;
background: #fff;
}
</style>
<style>
#menu {
position: absolute;
background: #fff;
padding: 10px;
font-family: 'Open Sans', sans-serif;
}
</style>
<div id='map'></div>
<div id='menu'>
<input id='streets-v11' type='radio' name='rtoggle' value='streets' checked='checked'>
<label for='streets'>streets</label>
<input id='light-v10' type='radio' name='rtoggle' value='light'>
<label for='light'>light</label>
<input id='dark-v10' type='radio' name='rtoggle' value='dark'>
<label for='dark'>dark</label>
<input id='outdoors-v11' type='radio' name='rtoggle' value='outdoors'>
<label for='outdoors'>outdoors</label>
<input id='satellite-v9' type='radio' name='rtoggle' value='satellite'>
<label for='satellite'>satellite</label>
</div>
<pre id='info'></pre>
<script>
mapboxgl.accessToken = 'pk.eyJ1Ijoic2lmYXQ1NzciLCJhIjoiY2p6dXNvN3ZnMGVqZTNjcDRrNWNqcTE5byJ9.Bg8-lwZjjNoswew2k1w2RA';
var map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/streets-v11',
zoom: 13,
center: [90.3897, 23.7270]
});
// Add zoom and rotation controls to the map.
map.addControl(new mapboxgl.NavigationControl());
//for displaying the latlon of mouse curson in map
map.on('mousemove', function (e) {
document.getElementById('info').innerHTML =
// e.point is the x, y coordinates of the mousemove event relative
// to the top-left corner of the map
JSON.stringify(e.point) + '<br />' +
// e.lngLat is the longitude, latitude geographical position of the event
JSON.stringify(e.lngLat.wrap());
});
var layerList = document.getElementById('menu');
var inputs = layerList.getElementsByTagName('input');
function switchLayer(layer) {
var layerId = layer.target.id;
map.setStyle('mapbox://styles/mapbox/' + layerId);
}
for (var i = 0; i < inputs.length; i++) {
inputs[i].onclick = switchLayer;
}
</script>
</body>
</html>
One way to do this (as you spoke about) is to convert the georeferenced image to another format. Here is an example of how to add a georeferenced image, as long as you know the geographic bounds :
map.addSource("myImageSource", {
"type": "image",
"url": "test.gif",
"coordinates": [
[-80.425, 46.437],
[-71.516, 46.437],
[-71.516, 37.936],
[-80.425, 37.936]
]
});
map.addLayer({
"id": "overlay",
"source": "myImageSource",
"type": "raster",
"paint": {
"raster-opacity": 0.85
}
});
You can also see https://docs.mapbox.com/mapbox-gl-js/example/image-on-a-map/ for more reference material.
Related
When I make request I get this.
I want the html to load and the run the scripts to create the full body before I parse it.
I working with flutter(dart).
I tried using the webview but I'm not getting the html from after the page is loaded.
When I make the request to the site, this is what the response looks like.
I need some help guys.
How should I go about it?
<!DOCTYPE HTML>
<html lang="en-US">
<head>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=1" />
<meta name="robots" content="noindex, nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<title>Just a moment...</title>
<style type="text/css">
html,
body {
width: 100%;
height: 100%;
margin: 0;
padding: 0;
}
body {
background-color: #ffffff;
color: #000000;
font-family: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, "Helvetica Neue", Arial, sans-serif;
font-size: 16px;
line-height: 1.7em;
-webkit-font-smoothing: antialiased;
}
h1 {
text-align: center;
font-weight: 700;
margin: 16px 0;
font-size: 32px;
color: #000000;
line-height: 1.25;
}
p {
font-size: 20px;
font-weight: 400;
margin: 8px 0;
}
p,
.attribution,
{
text-align: center;
}
#spinner {
margin: 0 auto 30px auto;
display: block;
}
.attribution {
margin-top: 32px;
}
#keyframes fader {
0% {
opacity: 0.2;
}
50% {
opacity: 1.0;
}
100% {
opacity: 0.2;
}
}
#-webkit-keyframes fader {
0% {
opacity: 0.2;
}
50% {
opacity: 1.0;
}
100% {
opacity: 0.2;
}
}
#cf-bubbles>.bubbles {
animation: fader 1.6s infinite;
}
#cf-bubbles>.bubbles:nth-child(2) {
animation-delay: .2s;
}
#cf-bubbles>.bubbles:nth-child(3) {
animation-delay: .4s;
}
.bubbles {
background-color: #f58220;
width: 20px;
height: 20px;
margin: 2px;
border-radius: 100%;
display: inline-block;
}
a {
color: #2c7cb0;
text-decoration: none;
-moz-transition: color 0.15s ease;
-o-transition: color 0.15s ease;
-webkit-transition: color 0.15s ease;
transition: color 0.15s ease;
}
a:hover {
color: #f4a15d
}
.attribution {
font-size: 16px;
line-height: 1.5;
}
.ray_id {
display: block;
margin-top: 8px;
}
#cf-wrapper #challenge-form {
padding-top: 25px;
padding-bottom: 25px;
}
#cf-hcaptcha-container {
text-align: center;
}
#cf-hcaptcha-container iframe {
display: inline-block;
}
</style>
<meta http-equiv="refresh" content="35">
<script type="text/javascript">
//<![CDATA[
(function(){
window._cf_chl_opt={
cvId: "2",
cType: "non-interactive",
cNounce: "86849",
cRay: "6a97b753b854da86",
cHash: "31c7b92e6efc7fe",
cPMDTk: "",
cFPWv: "b",
cTTimeMs: "1000",
cRq: {
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t: "MTYzNjEzMjQ0Mi4yMDcwMDA=",
m: "UHh8TWbrY8rIVckQYr2DEHf3xtqOy3IWbHpurhKo0Dg=",
i1: "bPb8laPvucq92fuTb8UHJQ==",
i2: "uyNfsEipqDYhS6+qFdYUkA==",
zh: "C039uzYEN6IwJDV7FwZVYsBSveHeK850qjEkkfVJ6vw=",
uh: "q2fUGDQwB25BKEmSOHJOj1NUZxjS6q3TVwtPqObOVZM=",
hh: "nfF1CEMggKTkMnWiuwyIjIi54NW2HaYcu4gV2CdK4ks=",
}
}
window._cf_chl_enter = function(){window._cf_chl_opt.p=1};
})();
//]]>
</script>
</head>
<body>
<table width="100%" height="100%" cellpadding="20">
<tr>
<td align="center" valign="middle">
<div class="cf-browser-verification cf-im-under-attack">
<noscript>
<h1 data-translate="turn_on_js" style="color:#bd2426;">Please turn JavaScript on and reload the
page.</h1>
</noscript>
<div id="cf-content" style="display:none">
<div id="cf-bubbles">
<div class="bubbles"></div>
<div class="bubbles"></div>
<div class="bubbles"></div>
</div>
<h1><span data-translate="checking_browser">Checking your browser before accessing</span>
gg.co.uk.</h1>
<div id="no-cookie-warning" class="cookie-warning" data-translate="turn_on_cookies"
style="display:none">
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Redirecting…</p>
</div>
<form class="challenge-form" id="challenge-form"
action="/racing/27-oct-2021/fakenham-1255?__cf_chl_jschl_tk__=I4acmyvWUrWbLXAGjYC5HXUh31EzMntIEES9DIs8Yg8-1636132442-0-gaNycGzNBmU"
method="POST" enctype="application/x-www-form-urlencoded">
<input type="hidden" name="md" value="WYgGQTwD0.PlAYN7zN9M7XpYgnUJxpt6W_rYCboneoQ-1636132442-0-AfDISHvT2GBIpWp1EPYu9cdxCuFQpLT_u7UKTH9TL-mj0X8Xxw9raGV2KUlDtB4DX7Z3h-LYRsfmLlNmrV-WstInbyHg2H3gWXOuMU2mnguq0TdSnDmB0MWffohG7RydsDYePGxxBYBAXhJMAYyRLWlbcprMPKCaHVm9zAxWf5tZFgYfCLP-CLdoXXS_HuKNhA0iXqanK-LYFcSJXKuvTr0M7oAx-vhljyX8JW3sJ2sgJlV7vLLB9MPl3l7WgWBZ4q0bW8KKVhNi3WXReGdIZUpIirNA6D2xHAe5oyfDMqUfEyopDE2EFGeNxKb2yI0qPvmmaup4WjHIG0DangljT0VcnK8oR2-lz7tVreiQQS50DcnX_EiDswWlbfXDvz83RI3IDOmSjBJXQZBSClMjhkCPs9yf5wOGXtq2jjd2sIFFWgw3zS5Q0n9dsTfFCNSFRGtOtHmCM2ztI8ivbpfvf27CNK55Xb7b2BPCOICarJUqM16ELz7AAQ6lS0OJymzCU0G1eC58DDvCiMCx6AC7nAI2ce38OjfjYHO5Wq_lI8u8VFrGaS4nZyySvn6-0gGqRA" />
<input type="hidden" name="r" value="i7Mahy4asxjhgyvRAVdQk8RCAO5shxagJMSNb2vkdXM-1636132442-0-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"/>
<input type="hidden" value="3734809bfba8e7119ff4a9e747f0a631" id="jschl-vc" name="jschl_vc"/>
<!-- <input type="hidden" value="" id="jschl-vc" name="jschl_vc"/> -->
<input type="hidden" name="pass" value="1636132443.207-qh8v/uVVqU"/>
<input type="hidden" id="jschl-answer" name="jschl_answer"/>
</form>
<script type="text/javascript">
//<![CDATA[
(function(){
var a = document.getElementById('cf-content');
a.style.display = 'block';
var isIE = /(MSIE|Trident\/|Edge\/)/i.test(window.navigator.userAgent);
var trkjs = isIE ? new Image() : document.createElement('img');
trkjs.setAttribute("src", "/cdn-cgi/images/trace/jschal/js/transparent.gif?ray=6a97b753b854da86");
trkjs.id = "trk_jschal_js";
trkjs.setAttribute("alt", "");
document.body.appendChild(trkjs);
var cpo=document.createElement('script');
cpo.type='text/javascript';
cpo.src="/cdn-cgi/challenge-platform/h/b/orchestrate/jsch/v1?ray=6a97b753b854da86";
document.getElementsByTagName('head')[0].appendChild(cpo);
}());
//]]>
</script>
<div id="trk_jschal_nojs"
style="background-image:url('/cdn-cgi/images/trace/jschal/nojs/transparent.gif?ray=6a97b753b854da86')">
</div>
</div>
<div class="attribution">
DDoS protection by <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing/"
target="_blank">Cloudflare</a>
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<span class="ray_id">Ray ID: <code>6a97b753b854da86</code></span>
</div>
</td>
</tr>
</table>
</body>
</html>
try to move <script> at the top of your app
I used the flutter WebView and it worked.
I wrote the full js script in a file.
The script does the parsing and returns the required data as json.
So I pass the script file content to my WebView controller's evaluateJavaScript and the result will be json. So I can just take that data and work with it.
// webview's controller
WebViewController? _controller;
// setup your webview and get the controller
WebView(
initialUrl: widget.url ?? 'https://www.google.com.tr',
onWebViewCreated: (controller) => _controller = controller,
javascriptMode: JavascriptMode.unrestricted,
gestureNavigationEnabled: true,
onPageFinished: (_) => readJS(),
);
//
void readJS() async {
String js = await fileReader.readFile("lib/js/main.js"); // read script file
String data = await _controller!.evaluateJavascript(js);
print("data\n$data");
}
check out the full code here
My web app contains two basemaps to display. I created a leaflet control layer to manage their visibility :
var baseMaps = {
"Bing Satellite": bingLayer,
"OpenCycleMap": tileLayer
};
L.control.layers(baseMaps).addTo(map);
The issue is the icon which should be within the control doesn't show up. When I inspect, the console renders a 404 error : Failed to load resource: the server responded with a status of 404 (Not Found) on layers-2px.png.
I'm using cdn to call leaflet so I have no clue about the issue!!
Here is the rendering in the map :
Your assistance would be appreciated.
I put a working example.
<html>
<head>
<meta charset=utf-8 />
<title>Leaflet Control.Layers</title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<!-- Load Leaflet from CDN -->
<link rel="stylesheet" href="https://unpkg.com/leaflet#1.3.4/dist/leaflet.css"
integrity="sha512-puBpdR0798OZvTTbP4A8Ix/l+A4dHDD0DGqYW6RQ+9jxkRFclaxxQb/SJAWZfWAkuyeQUytO7+7N4QKrDh+drA=="
crossorigin=""/>
<script src="https://unpkg.com/leaflet#1.3.4/dist/leaflet.js"
integrity="sha512-nMMmRyTVoLYqjP9hrbed9S+FzjZHW5gY1TWCHA5ckwXZBadntCNs8kEqAWdrb9O7rxbCaA4lKTIWjDXZxflOcA=="
crossorigin=""></script>
<!-- Load Esri Leaflet from CDN -->
<script src="https://unpkg.com/esri-leaflet#2.2.3/dist/esri-leaflet.js"
integrity="sha512-YZ6b5bXRVwipfqul5krehD9qlbJzc6KOGXYsDjU9HHXW2gK57xmWl2gU6nAegiErAqFXhygKIsWPKbjLPXVb2g=="
crossorigin=""></script>
<style>
body { margin:0; padding:0; }
#map { position: absolute; top:0; bottom:0; right:0; left:0; }
</style>
</head>
<body>
<div id="map"></div>
<script>
var gray = L.layerGroup();
// more than one service can be grouped together and passed to the control together
L.esri.basemapLayer("DarkGray").addTo(gray);
L.esri.basemapLayer("GrayLabels").addTo(gray);
var states = L.esri.featureLayer({
url: "https://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer/3",
style: function (feature) {
return {color: '#bada55', weight: 2 };
}
});
var map = L.map('map', {
center: [39, -97.5],
zoom: 4,
layers: [gray, states]
});
var baseLayers = {
"Grayscale": gray,
"Streetmap": L.esri.basemapLayer("Streets")
};
var overlays = {
"U.S. States": states
};
// http://leafletjs.com/reference-1.0.3.html#control-layers
L.control.layers(baseLayers, overlays).addTo(map);
</script>
</body>
</html>
You can modify the background-image property of the following css selectors by setting your custom image:
.leaflet-control-layers-toggle, .leaflet-touch .leaflet-control-layers-toggle {
background-image: url('http://ovrdc.github.io/parcel-viewer/assets/images/layers-bl.png');
background-size: 80%;
margin-top: 0px;
width: 36px;
height: 36px;
}
<html>
<head>
<meta charset=utf-8 />
<title>Leaflet Control.Layers</title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<!-- Load Leaflet from CDN -->
<link rel="stylesheet" href="https://unpkg.com/leaflet#1.3.4/dist/leaflet.css"
integrity="sha512-puBpdR0798OZvTTbP4A8Ix/l+A4dHDD0DGqYW6RQ+9jxkRFclaxxQb/SJAWZfWAkuyeQUytO7+7N4QKrDh+drA=="
crossorigin=""/>
<script src="https://unpkg.com/leaflet#1.3.4/dist/leaflet.js"
integrity="sha512-nMMmRyTVoLYqjP9hrbed9S+FzjZHW5gY1TWCHA5ckwXZBadntCNs8kEqAWdrb9O7rxbCaA4lKTIWjDXZxflOcA=="
crossorigin=""></script>
<!-- Load Esri Leaflet from CDN -->
<script src="https://unpkg.com/esri-leaflet#2.2.3/dist/esri-leaflet.js"
integrity="sha512-YZ6b5bXRVwipfqul5krehD9qlbJzc6KOGXYsDjU9HHXW2gK57xmWl2gU6nAegiErAqFXhygKIsWPKbjLPXVb2g=="
crossorigin=""></script>
<style>
body { margin:0; padding:0; }
#map { position: absolute; top:0; bottom:0; right:0; left:0; }
.leaflet-control-layers-toggle, .leaflet-touch .leaflet-control-layers-toggle {
background-image: url('http://ovrdc.github.io/parcel-viewer/assets/images/layers-bl.png');
background-size: 80%;
margin-top: 0px;
width: 36px;
height: 36px;
}
</style>
</head>
<body>
<div id="map"></div>
<script>
var gray = L.layerGroup();
// more than one service can be grouped together and passed to the control together
L.esri.basemapLayer("DarkGray").addTo(gray);
L.esri.basemapLayer("GrayLabels").addTo(gray);
var states = L.esri.featureLayer({
url: "https://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer/3",
style: function (feature) {
return {color: '#bada55', weight: 2 };
}
});
var map = L.map('map', {
center: [39, -97.5],
zoom: 4,
layers: [gray, states]
});
var baseLayers = {
"Grayscale": gray,
"Streetmap": L.esri.basemapLayer("Streets")
};
var overlays = {
"U.S. States": states
};
// http://leafletjs.com/reference-1.0.3.html#control-layers
L.control.layers(baseLayers, overlays).addTo(map);
</script>
</body>
</html>
I'm trying to build out the functionality to measure a line that a user draws over a Mapbox map, using turf.js 'length' feature.
That said, I'm a coding newb - I know just barely enough to be dangerous.
Ultimately I'd like to be able to draw both areas and lines, and have their respective measures returned (area for polygons, lengths for line strings).
Can anyone offer insight as to why this code doesn't work?
https://jsfiddle.net/knxwu342
<html>
<head>
<meta charset=utf-8 />
<title>Line Test</title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<style>
body { margin:0; padding:0; }
#map { position:absolute; top:0; bottom:0; width:100%; }
.calculation-box-length {
height: 75px;
width: 100px;
position: absolute;
bottom: 40px;
left: 10px;
background-color: rgba(255, 255, 255, .9);
padding: 15px;
text-align: center;
}
</style>
<script src='https://api.tiles.mapbox.com/mapbox.js/plugins/turf/v3.0.11/turf.min.js'>
</script>
<script src='https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-draw/v1.0.9/mapbox-gl-draw.js'></script>
<link rel='stylesheet' href='https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-draw/v1.0.9/mapbox-gl-draw.css' type='text/css'/>
<script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.45.0/mapbox-gl.js'>
</script>
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.45.0/mapbox-gl.css' rel='stylesheet' />
</head>
<body>
<div id='map'></div>
<div class='calculation-box-length'>
<p>Length:</p>
<div id='calculated-length'></div>
</div>
<nav id="menu"></nav>
<script>mapboxgl.accessToken = 'pk.eyJ1IjoibWJsYWNrbGluIiwiYSI6ImNqaWMxcGk2MzAwd3YzbG1oeW4yOHppdnYifQ.xdb-2slu5LapzpuMCiKzQQ';
//*********-----------------------------------------------------------------------------------------------------------------**********
//Create new map object
var map = new mapboxgl.Map({
container: 'map', // container id
style: 'mapbox://styles/mblacklin/cjii8o7w91g9o2stcktaeixai', // stylesheet location
center: [-117.572737, 51.746916], // starting position [lng, lat]
zoom: 16 // starting zoom
});
//*********-----------------------------------------------------------------------------------------------------------------**********
// Add navigation controls to the map
map.addControl(new mapboxgl.NavigationControl());
//*********-----------------------------------------------------------------------------------------------------------------**********
// Add the ability to draw geometries and display their measurements
//
var draw = new MapboxDraw({
displayControlsDefault: false,
controls: {
line_string: true,
polygon: true,
trash: true
}
});
map.addControl(draw);
map.on('draw.create.', updateLength);
map.on('draw.delete', updateLength);
map.on('draw.update', updateLength);
function updateLength(e) {
var data = draw.getAll();
var answer = document.getElementById('calculated-length');
if (data.features.length > 0) {
var length = turf.length(data);
// restrict to area to 2 decimal points
answer.innerHTML = '<p><strong>' + length + '</strong></p><p> meters</p>';
} else {
answer.innerHTML = '';
if (e.type !== 'draw.delete') alert("Use the draw tools in the upper right to calculate a distance");
}
};
//
//*********-----------------------------------------------------------------------------------------------------------------**********
</script>
</body>
</html>
I see two little problems in your code:
There is a typo in your 'draw.create' listener. Just remove the point after create:
map.on('draw.create', updateLength);
The version of Turf you are using is too old and does not seem to have the length function. Try using the most recent one: https://npmcdn.com/#turf/turf/turf.min.js
Good morning,
I modified one of the Mapbox GLJS coded examples with my custom data.
I am still not able to display the content of my layers.
It is supposed to update the chloropleth by zooming.
I received a lot of help from the customer support but to no avail so far.
I am not the most talented developer out there!
Here the link of the Mapbox example I used.
(https://www.mapbox.com/mapbox-gl-js/example/updating-choropleth/)
Here also a JSfiddle link to the modified example.
(https://jsfiddle.net/2fe3emd6/28/)
The modified code is the following one.
<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8' />
<title>Update a choropleth layer by zoom level</title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.44.1/mapbox-gl.js'></script>
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.44.1/mapbox-gl.css' rel='stylesheet' />
<style>
body { margin:0; padding:0; }
#map { position:absolute; top:0; bottom:0; width:100%; }
</style>
</head>
<body>
<style>
.legend {
background-color: #fff;
border-radius: 3px;
bottom: 30px;
box-shadow: 0 1px 2px rgba(0,0,0,0.10);
font: 12px/20px 'Helvetica Neue', Arial, Helvetica, sans-serif;
padding: 10px;
position: absolute;
right: 10px;
z-index: 1;
}
.legend h4 {
margin: 0 0 10px;
}
.legend div span {
border-radius: 50%;
display: inline-block;
height: 10px;
margin-right: 5px;
width: 10px;
}
</style>
<div id='map'></div>
<div id='zoneveg-legend' class='legend' style='display: none;'>
<h4>Zone de végétation</h4>
<div><span style='background-color: #B8B2B2'></span>Zone arctique</div>
<div><span style='background-color: #539140'></span>Zone boréale</div>
<div><span style='background-color: #7FDA10'></span>Zone tempérée nordique</div>
</div>
<div id='dombio-legend' class='legend' style='display: none;'>
<h4>Domaine bioclimatique</h4>
<div><span style='background-color: #C3C4C1'></span>Toundra arctique herbacée</div>
<div><span style='background-color: #696C6C'></span>Toundra arctique arbustive</div>
<div><span style='background-color: #9A7BA1'></span>Toundra forestière</div>
<div><span style='background-color: #C48D99'></span>Pessière à lichens</div>
<div><span style='background-color: #A9ACCA'></span>Pessière à mousses</div>
<div><span style='background-color: #6895BC'></span>Sapinière à bouleau blanc</div>
<div><span style='background-color: #81BC84'></span>Sapinière à bouleau jaune</div>
<div><span style='background-color: #EFCE6D'></span>Érablière à bouleau jaune</div>
<div><span style='background-color: #B3AC7E'></span>Érablière à tilleul</div>
<div><span style='background-color: #E1779B'></span>Érablière à caryer cordiforme</div>
</div>
<script>
mapboxgl.accessToken = 'pk.eyJ1Ijoic2FtZiIsImEiOiJjaWZ3bGhtdjgzMnN1dWdrcnEwZTVieG91In0.DkCY-91coDahKvpH7Z26dw';
var map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/light-v9',
center: [-72, 48],
minZoom: 2,
zoom: 3
});
var zoomThreshold = 4;
map.on('load', function() {
map.addSource('zone', {
'type': 'vector',
'url': 'mapbox://thematix.dy544jx6'
});
map.addLayer({
'id': 'NOM',
'source': 'zone',
'source-layer': 'zone_veg-9z9soa',
'maxzoom': zoomThreshold,
'type': 'fill',
'paint': {
'fill-color': [
'match',
['get', 'NOM'],
'', '#FFFFFF',
'Boréale', '#539140',
'Golfe du Saint-Laurent', '#90C4FF',
'Zone articque', '#B8B2B2',
'Tempérée nordique', '#7FDA10'
],
'fill-opacity': 0.75
}
}, 'waterway-label');
map.addSource('dom', {
'type': 'vector',
'url': 'mapbox://thematix.60h9x8bk'
});
map.addLayer({
'id': 'NOM',
'source': 'dom',
'source-layer': 'dom_bio-9xc27o',
'maxzoom': zoomThreshold,
'type': 'fill',
'paint': {
'fill-color': [
'match',
['get', 'NOM'],
'Toundra arctique herbacée', '#C3C4C1',
'Toundra arctique arbustive', '#696C6C',
'Toundra forestière', '#9A7BA1',
'Pessière à lichens', '#C48D99',
'Pessière à mousses', '#A9ACCA',
'Sapinière à bouleau blanc', '#6895BC',
'Sapinière à bouleau jaune', '#81BC84',
'Érablière à bouleau jaune', '#EFCE6D',
'Érablière à tilleul', '#B3AC7E',
'Érablière à caryer cordiforme', '#E1779B'
],
'fill-opacity': 0.75
}
}, 'waterway-label');
});
var zonevegLegendEl = document.getElementById('zoneveg-legend');
var dombioLegendEl = document.getElementById('dombio-legend');
map.on('zoom', function() {
if (map.getZoom() > zoomThreshold) {
zonevegLegendEl.style.display = 'none';
dombioLegendEl.style.display = 'block';
} else {
zonevegLegendEl.style.display = 'block';
dombioLegendEl.style.display = 'none';
}
});
</script>
</body>
</html>
Thanking you in advance.
Pierre-Y. Plourde
The match expression you are using for both custom layers is missing the default value which is not optional.
Docs: https://www.mapbox.com/mapbox-gl-js/style-spec#expressions-match
Here is an updated jsfiddle which is using rgba(0,0,0,0) as default value for both match expressions.
https://jsfiddle.net/2fe3emd6/35/
E.g. for the layer with ID ZONE_VEG it looks like this:
'fill-color': [
'match',
['get', 'NOM'],
'', '#FFFFFF',
'Boréale', '#539140',
'Golfe du Saint-Laurent', '#90C4FF',
'Zone articque', '#B8B2B2',
'Tempérée nordique', '#7FDA10',
'rgba(0,0,0,0)'
],
You are of course free to use a different default value.
Edit:
The cause for the further issue mentioned in your comment (the first layer is hidden by the second layer) is that both layers are having the same zoom extend. To fix it, just change for the layer with ID 'DOM_BIO' the 'maxzoom' to 'minzoom'.
Updated jsfiddle:
https://jsfiddle.net/2fe3emd6/43/
I am using Mapbox GL JS and I would like to allow users to change a map's background style from streets to satellite, while showing a polygon layer above the map background.
I have adapted the Mapbox example, but I can't work out how to stop map.setStyle from setting the new style above (and thus hiding) my polygon layer. I would like it to change without hiding the polygon layer.
Before switching layers:
After switching layers - polygon overlay missing, would like to carry on showing it:
This is my code in full:
<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8' />
<title></title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.33.1/mapbox-gl.js'></script>
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.33.1/mapbox-gl.css' rel='stylesheet' />
<style>
body { margin:0; padding:0; }
#map { position:absolute; top:0; bottom:0; width:100%; }
</style>
</head>
<body>
<style>
#menu {
position: absolute;
background: #fff;
padding: 10px;
font-family: 'Open Sans', sans-serif;
}
</style>
<div id='map'></div>
<div id='menu'>
<input id='basic' type='radio' name='rtoggle' value='basic' checked='checked'>
<label for='basic'>basic</label>
<input id='satellite' type='radio' name='rtoggle' value='satellite'>
<label for='satellite'>satellite</label>
</div>
<script>
mapboxgl.accessToken = 'pk.eyTOKEN';
var map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/basic-v9',
zoom: 5,
center: [-3.0, 54.6]
});
map.on('load', function () {
map.addSource('xxx', {
type: 'vector',
url: 'mapbox://xxx.xxx'
});
map.addLayer({
'id': 'xxx',
'source': 'xxx',
'type': 'fill',
'paint': {
'fill-color': 'red'
},
'source-layer': mylayer
}, 'road'); // Note that I'd like this to display above the OSM 'roads' layer
var layerList = document.getElementById('menu');
var inputs = layerList.getElementsByTagName('input');
function switchLayer(layer) {
var layerId = layer.target.id;
map.setStyle('mapbox://styles/mapbox/' + layerId + '-v9');
}
for (var i = 0; i < inputs.length; i++) {
inputs[i].onclick = switchLayer;
}
});
</script>
</body>
</html>
Mapbox GL JS does not have the concept of a "base layer" and "overlays." All layers of all maps are drawn with the same basic primitives.
If you need to persist one or more custom layers while switching between the provided Mapbox styles, you may choose to
fork the Mapbox style and add your custom layers in Studio
re-add your custom layers after switching styles
download the Mapbox style as JSON in the browser and add your custom layers to the style in the browser