I'm trying to plot a supplied vector tile layer onto a map using MapBox GL JS. I've followed the documentation here but nothing apart from the basic map is being output and there are no console errors. In the browser's Network tab I can see lots of .pbf requests being returned with data so it would seem that the endpoint is passing data back, but I don't know how to determine what the problem is in plotting that data onto the map.
The code is as follows:
mapboxgl.accessToken = '[my access token]';
const map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/light-v10',
zoom: 6,
center: [-0.118092, 51.509865]
});
map.once("load", () => {
map.addSource("ncn", {
type: "vector",
tiles: [
"https://tiles.arcgis.com/tiles/1ZHcUS1lwPTg4ms0/arcgis/rest/services/NCN_Vector_Tile_Package/VectorTileServer/tile/{z}/{y}/{x}.pbf"
]
});
map.addLayer({
id: "ncn-lines",
type: "line",
source: "ncn",
"source-layer": "NCN_Vector_Tile_Package",
"layout": {
"visibility": "visible"
},
'paint': {
'line-color': 'rgb(255, 0, 0)'
}
});
});
I am fairly sure that the type should be line (rather than fill) as the data is supposed to contain route lines rather than vector shapes.
I don't have access to the Arcgis server so can't see how anything is configured at that side. Can anyone suggest what might be wrong here and/or how to debug?
It looks like the value for source-layer is not correct - it should be NCN_2020. Here's a demo showing it working: https://jsbin.com/xunuhibuki/1/edit?html,output
How do you get that value? I'm not quite sure the best way, but the way I found: add ?f=html to your vector tile layer like this: https://tiles.arcgis.com/tiles/1ZHcUS1lwPTg4ms0/arcgis/rest/services/NCN_Vector_Tile_Package/VectorTileServer/?f=html then click "Styles" link at the bottom which gives you an example of how to construct your map.addLayer() commands in your mapboxgl code.
Related
I'd like to render a layer from geoserver with using WMTS.
I'm using mapbox-gl to render a map and layers.
The website I'm referring to is https://docs.geoserver.org/stable/en/user/styling/mbstyle/source.html.
This shows how to create a layer on geoserver and render it on a mapbox map.
However, I'm getting an error TileOutOfRange when I request tiles.
For example, when I request tiles with this url,
http://<my_server>:8080/geoserver/gwc/service/wmts?REQUEST=GetTile&SERVICE=WMTS&VERSION=1.0.0&LAYER=myspace:japan&STYLE=&TILEMATRIX=EPSG:4326:8&TILEMATRIXSET=EPSG:4326&FORMAT=application/vnd.mapbox-vector-tile&TILECOL=221&TILEROW=102.
I get this error message.
Column 221 is out of range, min: 440 max:462.
Here below is my code to fetch a layer that I created on geoserver.
map.on("load", () => {
map.addSource("test", {
type: "vector",
tiles: ["http://<my_server>:8080/geoserver/gwc/service/wmts?REQUEST=GetTile&SERVICE=WMTS&VERSION=1.0.0&LAYER=myspace:japan&STYLE=&TILEMATRIX=EPSG:4326:{z}&TILEMATRIXSET=EPSG:4326&FORMAT=application/vnd.mapbox-vector-tile&TILECOL={x}&TILEROW={y}"],
generateId: true,
minZoom: 0,
maxZoom: 14,
});
map.addLayer({
"id": "test",
"type": "fill",
"source": "test",
"source-layer": "japan",
"layout": { "visibility": "visible" },
"paint": {}
});
});
It would be much appreciated if anyone gave me a way to solve this.
Thank you.
I made sure that I checked this box application/vnd.mapbox-vector-tile in the tile caching settings.
I left out 900913 from the default gridset settings, since my data is EPSG:4326.
When creating a layer, I made sure that I clicked Compute from data and Compute from native bounds to set bounding boxes.
I followed
https://medium.com/#mrgrantanderson/https-medium-com-serving-vector-tiles-from-django-38c705f6
to serve the mvt tiles to the mapbox from geoDjango.
With running query
cursor.execute("SELECT ST_AsMVT(tile) FROM (SELECT osm_id, building, ST_AsMVTGeom(geom, TileBBox(%s, %s, %s, 3857)) FROM nepal_khokanabuildings ) AS tile", [zoom, x, y])
as my model project is ESPG:3857
The Vectors don't seem to load up on the map, the api request is working fine.
I also tried serving vector files from Geoserver no luck either.
Here is my JS File
var map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/light-v10',
zoom: 12,
center: [85.294688,27.634106],
});
var mapillarySource = {
type: 'vector',
tiles: [
'http://0.0.0.0:8000/nepal/api/v1/data/nepal/{z}/{x}/{y}.mvt'
],
minzoom: 0,
maxzoom: 14
};
map.on('load', function() {
map.addSource('mapillary', mapillarySource);
map.addLayer({
'id': 'mapillary',
'type': 'fill',
'source': 'mapillary',
'source-layer': 'water',
'paint': {
"fill-color": "#00ffff"
}
});
});
map.addControl(new mapboxgl.NavigationControl());
</script>
There are lots of problems that can manifest themselves as "my layers don't show".
You can check each of these things:
is the layer being created before the map is ready? (wait for "load" event)
are the correct tile requests being generated?
are those requests succeeding?
are they returning actual .pbf files?
do they contain data in the right location, and in the right projection?
do they contain a layer with the name you expect? ('water' in this case)
do they contain data of the type you expect? (polygons in this case)
I am curious about the 0.0.0.0 host, but also suspect that the layer name may not be right.
If your tile requests are succeeding, you can try using https://stevage.github.io/vector-inspector/ to inspect them, although you may have issues with that page being served on HTTPS and your local tiles being on HTTP.
Use Following ,
"id": "postgis-tiles-layer",
"source-layer": "default",
I am using geoserver. I write the following code;
const mywms = L.tileLayer.wms("http://localhost:8080/geoserver/taj/wms", {
layers: 'taj:country',
format: 'image/png',
CQL_FILTER: 'name=pana'
transparent: true,
opacity: 0.4,
version: '1.1.0',
attribution: "country layer"
});
All is good. The layer get filtered. But I need the selected feature to zoom full extend.
I tried to center the mywms layer using this code; map.fitBounds(mywms.GetBounds());. But it shows the error; mywms.getBOunds is not a function. Any help?
As is pointed out in the comments WMS requests contain the bounding box of the map in the request and so will always cover the whole of the map area.
To get the extent of a single feature you need to make a WFS request with the filter included and then zoom to the extent of that feature when it is returned.
Thank you very much for all of the helping hands. And special thanks to Mr. Ina Turton who helps me to find out the actual problem and get the solution. my url for the wfs server looks like this;
http://localhost:8080/geoserver/tajikistan/ows?service=WFS&version=1.0.0&request=GetFeature&typeName=taj%3Acountry&maxFeatures=50&outputFormat=application%2Fjson
I write the following code to for zooming into my cql_filter area:
//Geoserver Web Feature Service
$.ajax('http://localhost:8080/geoserver/wfs',{
type: 'GET',
data: {
service: 'WFS',
version: '1.1.0',
request: 'GetFeature',
typename: 'tajikistan:country',
CQL_FILTER: "name_rg='Centre'",
srsname: 'EPSG:4326',
outputFormat: 'text/javascript',
},
dataType: 'jsonp',
jsonpCallback:'callback:handleJson',
jsonp:'format_options'
});
function handleJson(data) {
var requiredArea = L.geoJson(data).addTo(map);
map.fitBounds(requiredArea.getBounds())
}
In this code the CQL_FILTER is used for to filter out the required area. In my case the data having column name name_rg which have the property as Centre. I query this region using this code. I fetch the data using ajax method. I write the code little tricky because the regular ajax call doesn't callback the handleJson function and return an parseJson error. And finally I added the variable named as requiredArea. Get bounds of this region and set bounds of the required region and added into the map.
I want to change the style of my layer on a certain zoom (circle to symbol). When I cross zoom 5, what I thought I could do was to remove my previous layer, then create a new one with the old source. Actually, it gives me an error.
If I create a new source with the same data everything works fine, the error is about the source. What I don't understand is that the source is still present as I can interact with it.
Please find my fiddle, open the console to see :
the zoom (wait for zoom 5)
the data contained by the source
the error
glMap.addSource('yacht', {
type: 'geojson',
data: data,
buffer: 256
});
glMap.addLayer({
"id": "yachtL",
"type": "circle",
"interactive": true,
//'style': '/bright-v8.json',
"source": "yacht",
'layout': {},
'paint': {
'circle-color': '#262626',
'circle-opacity': 0.8
}
}/*, "cargoL"*/);
removeSpinner();
Give the new layer a new id, then it will work. Currently they both have the id of 'yachtL'.
I'm trying to make a mapping visualization in realtime, where I keep getting new points via websockets. The initial plotting these markers on the map seems simple, but I'm not sure what's the right way of updating a layer on Mapbox.
As of now, whenever I get a new point, I remove the old layer, create a new one and then add it on the map. The problem with this approach is that it is slow and for high number of points (>5000) it starts lagging.
// remove layer
if (this.pointsLayer != null) {
map.removeLayer(this.pointsLayer);
}
// build geoJSON
var geoJSON = { "type": "FeatureCollection", "features": [] };
geoJSON["features"] = tweets.map(function(tweet) {
return this.getGeoPoint(tweet);
}.bind(this));
// add geoJSON to layer
this.pointsLayer = L.mapbox.featureLayer(geoJSON, {
pointToLayer: function(feature, latlon) {
return L.circleMarker(latlon, {
fillColor: '#AA5042',
fillOpacity: 0.7,
radius: 3,
stroke: false
});
}
}).addTo(map);
Is there a better way?
You can create an empty GeoJSON layer by passing it a false instead of real data:
//create empty layer
this.pointsLayer = L.mapbox.featureLayer(false, {
pointToLayer: function(feature, latlon) {
return L.circleMarker(latlon, {
fillColor: '#AA5042',
fillOpacity: 0.7,
radius: 3,
stroke: false
});
}
}).addTo(map);
then use .addData to update it as new tweets come in. Something like:
// build geoJSON
var geoJSON = { "type": "FeatureCollection", "features": [] };
geoJSON["features"] = /**whatever function you use to build a single tweet's geoJSON**/
// add geoJSON to layer
this.pointsLayer.addData(geoJSON);
For a single tweet, I guess you could just create a Feature instead of a FeatureCollection, though I don't know whether that extra layer of abstraction would make any difference in terms of performance.
EDIT: Here is an example fiddle showing the .addData method at work:
http://jsfiddle.net/nathansnider/4mwrwo0t/
It does slow down noticeably if you add 10,000 points, and for 15,000 points, it's really sluggish, but I suspect that has less to do with how the points are added that the demands of rendering so many circleMarkers.
If you aren't already, you may want to try using the new Leaflet 1.0 beta, which redraws vector layers faster and is generally much more responsive with large datasets. Compare this 15,000-point example using Leaflet 0.7.5 to the same code using Leaflet 1.0.0b2. Not everything is fixed (popups take a long time to open in both), but the difference in lag time when trying to drag the map is pretty dramatic.
There's no reason to go through the intermediate step of construction a GeoJSON object just so you can add it to the map. Depending on your exact needs, you can do something like this:
tweets.forEach(function(t) {
L.marker(this.getGeoPoint(t)).addTo(map);
}, this);
You should manage the tweets object so it only contains points that are not already visible on the map, though. Deleting all the old markers, just so you can add them again, is of course going to be very slow.
I would take a look at Leaflet Realtime:
Put realtime data on a Leaflet map: live tracking GPS units, sensor data or just about anything.
https://github.com/perliedman/leaflet-realtime