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I have found the following code to show and hide layers in Mapbox GL:
https://www.mapbox.com/mapbox-gl-js/example/toggle-layers/
This is helpful, however, I only have one .geojson layer (polylines) with all of the necessary data and do not need to create separate layers.
I would like to make the exact same function of being able to show and hide features of one layer in the map menu. There are a total of 12 different feature types, contained in the column named "Type". I would like to toggle types on and off, just like in the example.
Is there an easy way to do this in JS with the set.Filter?
https://github.com/mapbox/mapbox-gl-js/blob/e9386d2880cc2c33e9a5a16b9bcb58834026a078/js/ui/map.js#L559-L562
I have been unable to come up with a solution.
My .geojson layer is here: https://iskandarblue.github.io/mapbox/data/simplify_prototype.geojson
<!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/v0.15.0/mapbox-gl.js'></script>
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.15.0/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 {
background: #fff;
position: absolute;
z-index: 1;
top: 10px;
right: 10px;
border-radius: 3px;
width: 120px;
border: 1px solid rgba(0,0,0,0.4);
font-family: 'Open Sans', sans-serif;
}
#menu a {
font-size: 13px;
color: #404040;
display: block;
margin: 0;
padding: 0;
padding: 10px;
text-decoration: none;
border-bottom: 1px solid rgba(0,0,0,0.25);
text-align: center;
}
#menu a:last-child {
border: none;
}
#menu a:hover {
background-color: #f8f8f8;
color: #404040;
}
#menu a.active {
background-color: #3887be;
color: #ffffff;
}
#menu a.active:hover {
background: #3074a4;
}
</style>
<nav id="menu"></nav>
<div id="map"></div>
<script>
mapboxgl.accessToken = 'pk.eyJ1IjoiaXNrYW5kYXJibHVlIiwiYSI6ImNpazE3MTJldjAzYzZ1Nm0wdXZnMGU2MGMifQ.i3E1_b9QXJS8xXuPy3OTcg';
var map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/streets-v8',
zoom: 15,
center: [-71.97722138410576, -13.517379300798098]
});
map.on('style.load', function () {
map.addSource('museums', {
type: 'vector',
url: 'mapbox://mapbox.2opop9hr'
});
map.addLayer({
'id': 'museums',
'type': 'circle',
'source': 'museums',
'paint': {
'circle-radius': 8,
'circle-color': 'rgba(55,148,179,1)'
},
'source-layer': 'museum-cusco'
});
map.addSource('contours', {
type: 'vector',
url: 'mapbox://mapbox.mapbox-terrain-v2'
});
map.addLayer({
'id': 'contours',
'type': 'line',
'source': 'contours',
'source-layer': 'contour',
'layout': {
'line-join': 'round',
'line-cap': 'round'
},
'paint': {
'line-color': '#877b59',
'line-width': 1
}
});
});
addLayer('Contours', 'contours');
addLayer('Museums', 'museums');
function addLayer(name, id) {
var link = document.createElement('a');
link.href = '#';
link.className = 'active';
link.textContent = name;
link.onclick = function (e) {
e.preventDefault();
e.stopPropagation();
var visibility = map.getLayoutProperty(id, 'visibility');
if (visibility === 'visible') {
map.setLayoutProperty(id, 'visibility', 'none');
this.className = '';
} else {
this.className = 'active';
map.setLayoutProperty(id, 'visibility', 'visible');
}
};
var layers = document.getElementById('menu');
layers.appendChild(link);
}
</script>
</body>
</html>
243
I was trying to do the same thing and ended up using combo filters. Similar to you, I have a map with a geoJSON source:
map.addSource( 'routes', {
'type': 'geojson',
'data': geoJSON
});
On that map, I have a layer with all my routes:
map.addLayer({
'id': 'route-no-hover',
'type': 'line',
'source': 'routes',
'layout': {
'line-join': 'round',
'line-cap': 'round'
},
'paint': {
'line-color': '#333',
'line-opacity': 0.25,
'line-width': 4
}
});
I'm listing all my routes and providing the user with the availability to toggle them on and off. It sounds like my concept of "routes" is equivalent to your "types". When a user clicks a route name to turn it off, I push that route's ID into an array called 'hidden' then create a series of filters based on those IDs:
let hiddenFilters = ['all'];
_.forEach( mapMeta.hidden, ( route ) => {
hiddenFilters.push([
'!=',
'id',
route.toString()
]);
});
map.setFilter( 'route-no-hover', hiddenFilters );
Note that I'm using lodash but you could just use Array.forEach()
I'm effectively creating a filter that looks like this combining filter described in the filtering docs:
[
"all",
["!=", "id", "routeIDHere"],
["!=", "id", "routeIDHere"],
...
]
This excludes all the routes with the IDs I specify. In your case, I think you'd want to have something like
[
"all",
["!=", "type" "YourTypeNameHere"]
...
]
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