I have circle markers on my leaflet map using the below code which all works fine.

However I want to show the markers in a different color based on the attribute field named 'stype'.

Any help or guidance on how I can achieve this?

        function siteslabels (feature, layer){
        layer.bindPopup("<p class='info header'>"+ 
        "<b>" + feature.properties.SITE + "</b>" + 
        "</br>" + feature.properties.Address1 +
        "</br>" + feature.properties.stype +
        "</p>");
        };


        var geojsonMarkerOptions = {
            radius: 8,
            fillColor: 'green',
            color: 'black',
            weight: 1,
            opacity: 1,
            fillOpacity: 0.8
        };

        L.geoJson(sites, {
            pointToLayer: function (feature, latlng) {
                return L.circleMarker(latlng, geojsonMarkerOptions);
            },
            onEachFeature: siteslabels
        }).addTo(map);

I have circle markers on my leaflet map using the below code which all works fine.

However I want to show the markers in a different color based on the attribute field named 'stype'.

Any help or guidance on how I can achieve this?

        function siteslabels (feature, layer){
        layer.bindPopup("<p class='info header'>"+ 
        "<b>" + feature.properties.SITE + "</b>" + 
        "</br>" + feature.properties.Address1 +
        "</br>" + feature.properties.stype +
        "</p>");
        };


        var geojsonMarkerOptions = {
            radius: 8,
            fillColor: 'green',
            color: 'black',
            weight: 1,
            opacity: 1,
            fillOpacity: 0.8
        };

        L.geoJson(sites, {
            pointToLayer: function (feature, latlng) {
                return L.circleMarker(latlng, geojsonMarkerOptions);
            },
            onEachFeature: siteslabels
        }).addTo(map);

• javascript
• html
• leaflet
• geojson

2 Answers 2

Got it sorted. Here is my code

    <script>    
        <!-- long and lat for UK & Zoom level for whole of UK  -->
        var map = L.map('map',{ center:[54.038486, -1.948915], zoom: 5});

        L.tileLayer('http://{s}.tile.osm/{z}/{x}/{y}.png', {
        attribution: '&copy; <a href="http://osm/copyright">OpenStreetMap</a> contributors'
        }).addTo(map);



        <!-- LAYERS/SITES -->
        <!-- LAYERS/SITES POP UP CONTENT-->
        function siteslabels (feature, layer){
        layer.bindPopup("<p class='info header'>"+ 
        "<b>" + feature.properties.SITE + "</b>" + 
        "</br>" + feature.properties.Address1 +
        "</br>" + feature.properties.stype +
        "</p>");
        };

        <!-- LAYERS/SITES POP UP COLOUR CIRCLE MARKERS->
        function getColor(stype) {
          switch (stype) {
            case 'POP':
              return  'orange';
            case 'Regen':
              return 'green';
            case 'LLU':
              return 'blue';
            case 'Colo':
              return 'purple';
            case 'DMSU':
              return 'blue';
            default:
              return 'white';
          }
        }

        <!-- LAYERS/SITES ADD LAYER->
        L.geoJson(sites, {
            pointToLayer: function (feature, latlng) {
            return new L.CircleMarker(latlng, {radius: 8, 
                                                fillOpacity: 1, 
                                                color: 'black', 
                                                fillColor: getColor(feature.properties.stype), 
                                                weight: 1,});
            },
            onEachFeature: siteslabels
        }).addTo(map);


    </script>

Check the Leaflet GeoJSON tutorial again, pointToLayer option section.

If you render your points as CircleMarkers, you can easily set their style to use different colours.

If you stick with Markers, you have to provide custom Icons. You can look for marker plugins, e.g. Leaflet.Extra-Markers.