I would like to add a custom marker to my map. I am using a mapbox gl script.
The only documentation that I found related to this topic is this one https://www.mapbox.com/mapbox-gl-js/example/geojson-markers/.
I tried to customize given example and I managed to add a marker and modify it a little changing the size, but since I don't understand all the parameters, I don't know how to add my own marker. Is there any documentation that is more detailed?
Here is my code:
<script>
mapboxgl.accessToken = 'pk.eyJ1IjoiYWl3YXRrbyIsImEiOiJjaXBncnI5ejgwMDE0dmJucTA5aDRrb2wzIn0.B2zm8WB9M_qiS1tNESWslg';
var map = new mapboxgl.Map({
container: 'map', // container id
style: 'mapbox://styles/aiwatko/cipo0wkip002ddfm1tp395va4', //stylesheet location
center: [7.449932,46.948856], // starting position
zoom: 14.3, // starting zoom
interactive: true
});
map.on('load', function () {
map.addSource("markers", {
"type": "geojson",
"data": {
"type": "FeatureCollection",
"features": [{
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [7.4368330, 46.9516040]
},
"properties": {
"title": "Duotones",
"marker-symbol": "marker",
}
}]
}
});
map.addLayer({
"id": "markers",
"type": "symbol",
"source": "markers",
"layout": {
"icon-image": "{marker-symbol}-15",
"icon-size": 3
}
});
});
</script>
Thanks in advance!
Oktawia
There are two ways to customize markers in Mapbox.
Raster Markers in Mapbox
See this link on Mapbox.com for Custom marker icons. That example shows how to use a .png as a marker.
SVG Markers in Mapbox
You are pretty close to modifying the icons, but take some time to familiarize yourself with the parameters.
The icon-image may be the harder one to understand. It takes the property "marker-symbol": "marker" from the GeoJson, and "icon-image": "{marker-symbol}-15", to create the final result of marker-15.
This brings up a further question: where/how are the markers defined?!?
The markers also come from Mapbox and are called Maki Icons. You can change the "marker-symbol" to aquarium or cafe to see the results.
From the Mapbox GL Style Reference
icon-size — Scale factor for icon. 1 is original size, 3 triples the size.
icon-image — A string with {tokens} replaced, referencing the data property to pull from.
Related
Can you pass coordinate values as variables when trying to retreive an external GeoJSON data source? Ideally I'd like to pass something like this, but it doesn't work for me.
map.addSource('geojsonpoints', {
type: "geojson",
data: 'http://myexample.com/pins?lat={lat}&lon={long}'
});
I am able to pass Z, X, Y coordinates if I use Map Vector Tiles (mvt) as a source. i.e. This works:
map.addSource('mapvectortiles', {
'type': 'vector',
'tiles': ['http://myexample.com/{z}/{x}/{y}'],
But I haven't figured out how to do it for a GeoJSON source. Anyone have any ideas if it is possible in n Mapbox GL JS?
FYI, I am able to generate the URL using the method below, but the problem is it doesn't refresh when I move the map, unlike vector tiles.
var lng = map.getCenter().lng
var lat = map.getCenter().lat
var url = 'http://myexample.com/pins?lat='+lat+'&lon='+lng
map.addSource('EPC', {
type: "geojson",
data: url
});
I use GeoJSON to draw Tiles on the map
this is a sample GeoJSON:
{ "type": "FeatureCollection",
"features": [
{ "type": "Feature",
"geometry": {
"type": "Polygon",
"coordinates": [
[
[4.342254780676343, 50.89533552689166],
[4.342254780676343, 50.89443721160754],
[4.340830581474948, 50.89443721160754],
[4.340830581474948, 50.89533552689166],
[4.342254780676343, 50.89533552689166]
]
]
},
"properties": {}
}
]
}
after all you have to add the source and add the layer
add Source:
const sourceJson: GeoJSONSourceRaw = {
type: 'geojson',
data: data as FeatureCollection
};
map.addSource(sourceId, sourceJson)
data is your json file
add Layer:
const layer: FillLayer = {
id: sourceId,
source: sourceId,
type: 'fill',
paint: {
'fill-color': color,
'fill-opacity': opacity
}
}
this.map.addLayer(layer);
There are two parts to your question:
Update the data source when the map is moved
Use the map's extent as part of the GeoJSON source's URL.
You have part 2 under control, so:
Update the data source when the map is moved
Use map.on('moveend', ...
Use map.getSource(...).setData(...)
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've been trying to get Leaflet to display a geojson file using the styles described in the geojson file, and I can't get it to work. The geojson below shows that I've got styles in there - OGR style pen etc, but I've tried extracting them using style function(styles) {return {colour : data.properties.pen}}, but it gives me an error on the console - but not enough errors to match the number of layers - so I can understand that some layers may not have a "pen" property, but none of the layers are coming up with the any differences.
"features": [
{ "type": "Feature", "properties": { "Layer": "Buildings", "SubClasses": "AcDbEntity:AcDb2dPolyline", "EntityHandle": "2ABF", "OGR_STYLE": "PEN(c:#ff7f00,p:"1.2g 0.72g 0.12g 0.72g")" }, "geometry": { "type": "LineString", "coordinates": [ [ -1.386274792183286, 54.907452998026585, 0.0 ], [ -1.386201193400163,
In fact, as the above geojson shows, it's actually a geometry - but all that's showing up is a marker, which is my second problem. Can anyone point me to some example codes or anything which may help me?
$.getJSON(address, function(data) {
//add GeoJSON layer to the map once the file is loaded
layer[i] = L.geoJson(data, {style: function(styles) {
return {color: data.properties.pen,
weight: data.properites.weight
};
onEachFeature: onEachFeature
}
}).addTo(map);
Thanks.
Change your code to:
function onEachFeature(feature, layer) {
if (feature.properties && layer instanceof L.Path) {
layer.setStyle({
color: feature.properties.pen,
weight: feature.properites.weight
});
}
}
$.getJSON(address, function(data) {
//add GeoJSON layer to the map once the file is loaded
layer[i] = L.geoJson(data, {
onEachFeature: onEachFeature
}).addTo(map);
});
Leaflet GeoJson Tutorial
When I add a marker to my mapbox gl script, it's positionned in a way that its center indicates the location, not the base. As a consquence, the marker seems to indicate an incorrect location.
Please see the screenshot
Is there a way to change the part of the image that is used as the base for the coordinates?
Thanks in advance!
Oktawia
Use the icon-offset layout property to offset the icon from your coordinates
map.addLayer({
"id": "pointclick",
type: 'symbol',
source: 'pointclick',
"layout": {
"icon-image": "{marker-symbol}",
"icon-size":1,
"icon-offset": [0, -13]
},
"paint": {}
});
I understood that I can use the general Leaflet layer, and the more advanced map-box featureLayer, that provides useful functions as the filter.
However, I don't understand the difference between
marker = L.Marker (new L.LatLng(lat, lng),
{
icon: L.mapbox.marker.icon(
{'marker-color': 'fc4353'
'marker-size': 'large'
}),
title: name,
});
map.addLayer(marker);
and
var poijson = {
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [lng, lat]
},
"properties": {
"title": poi.name,
"marker-color": "#fc4353",
"marker-size": "large"
}
};
map.featureLayer.setGeoJSON(geojson);
Is it just the same?
[UPDATE]
Moreover, if I had many markers, should I add a new layer for each marker? It seems not a good thing for performance..
For instance, If I do:
var pois; //loaded with pois info
var geojson=[]; //will contain geojson data
for (p=0; p< pois.length; p++)
{
var poi = pois[p];
var poijson =
{
"type": "Feature",
"geometry":
{
"type": "Point",
"coordinates": [poi.lng, poi.lat]
}
};
geojson.push(poijson);
}
map.featureLayer.setGeoJSON(geojson);
Does it will create many layers for each poi, or just one layer with all the markers?
thank you
When you add a marker to a Leaflet map via map.addLayer(marker);, the marker is added to the 'leaflet-maker-pane'. The markers are plain images/icons.
You can use a geoJSON layer to draw GIS features: points, lines, polygons, etc.
See here: http://leafletjs.com/examples/geojson.html
Mapbox's featureLayers is just an extension to Leaflet's geoJSONLayer
To add multiple markers, call addMarker multiple times. Leaflet will create a new layer for each of the markers. Each marker will be added as an image element to the leaflet-marker-pane div:
http://bl.ocks.org/d3noob/9150014
Updated response:
If you add a GeoJSON layer with multiple features, Leaflet will create separate layer for each of the features. You can inspect the layers of the map by calling map._layers after adding the GeoJSON Layer.
marker.addTo(map) and map.addLayer(marker) are doing the same thing.
Here's the addTo function taken from the source
addTo: function (map) {
map.addLayer(this);
return this;
},