在小册子中为圆形标记添加静态标签

Question

I am trying to add additional labels to my circle markers in Leaflet.

So right now I have like this:

But I need to have this kind of look:

Here is my code part:

var Classroomsbyamount = new L.LayerGroup();
var Classroomsamount = new L.geoJson(buildingPoints, { 
    pointToLayer: function(feature, latlng) {
        if(feature.properties.Classroomsstyleamt) {
        return new L.CircleMarker(latlng, feature.properties.Classroomsstyleamt, {radius: feature.radius}); }
    }, 
    onEachFeature: function(feature, layer) { 
        if (feature.properties && feature.properties.building_name) { 
            var thenumber20 = feature.properties.spacecategoryClassroomsamt; 
            var number30 = thenumber20.toLocaleString('en');
            layer.bindPopup({ html: '<b>' + number30 + '</b>' });
            layer.bindPopup(feature.properties.building_name + "<br> Amount:" + number30, {maxWidth: "none", closeButton: true, offset: L.point(0, -20)});
            layer.on('mouseover', function() { layer.openPopup(); }); 
            layer.on('click', function() { 
                var capacityGroup = feature.properties.building_name;
                popUp(capacityGroup);
            });
        }
    }



}).addTo(Classroomsbyamount);

How can I add labels to my circles on the map?

Answer 1

A somewhat simple solution would be to create a permanent tooltip for each feature, centered on the coordinates of the circles.

Something like

onEachFeature: function(feature, layer) {
    var text = L.tooltip({
        permanent: true,
        direction: 'center',
        className: 'text'
    })
    .setContent("some text")
    .setLatLng(layer.getLatLng());
    text.addTo(Classroomsbyamount);

    // rest of your code
}

And a demo

 var map = L.map(document.getElementById('map')).setView([48.8583736, 2.2922926], 12); L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', { attribution: '&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors' }).addTo(map); var buildingPoints = [ { "type": "Feature", "geometry": { "type": "Point", "coordinates": [2.2922926, 48.85] }, "properties": { "text": "5", "radius": 60 } }, { "type": "Feature", "geometry": { "type": "Point", "coordinates": [2.35, 48.86] }, "properties": { "text": "4", "radius": 40 } } ]; var Classroomsamount = new L.geoJson(buildingPoints, { pointToLayer: function(feature, latlng) { return new L.CircleMarker([latlng.lat, latlng.lng], {radius: feature.properties.radius}); }, onEachFeature: function(feature, layer) { var text = L.tooltip({ permanent: true, direction: 'center', className: 'text' }) .setContent(feature.properties.text) .setLatLng(layer.getLatLng()); text.addTo(map); var text2 = L.tooltip({ direction: 'top', className: 'text2' }) .setContent(feature.properties.text) .setLatLng(layer.getLatLng()); layer.bindTooltip(text2); } }).addTo(map); 

 html, body { height: 100%; margin: 0; } #map { width: 100%; height: 100%; } .leaflet-tooltip-pane .text { color: red; font-weight: bold; background: transparent; border:0; box-shadow: none; font-size:2em; } 

 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.3.1/leaflet.css"/> <script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.3.1/leaflet.js"></script> <div id='map'></div>