Layers based on markers properties? (Filter geojson)

[Luca Moiana]

Hi,

I have a large geojson containg points ("origin");

I want to filter markers, based on properties.TIPOLOGIA (values ranging from 1 to 4) and create different layers for each type.

var map = L.map('map').setView([42.413, 12.846], 7);

//aggiungo un layer di sfondo, o Base Layer

var baseLayer = L.tileLayer('http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png',{

attribution: 'Map data &copy; <a href="http://openstreetmap.org">OpenStreetMap</a> contributors, <a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>, Imagery © <a href="http:// mapbox.com">Mapbox</a>',

maxZoom: 18

}).addTo(map);

// Dati GeoJSON

var nidi = L.geoJson(origin, {

pointToLayer : function  (feature, latlng) {

lat = feature.geometry.coordinates[0];

lng = feature.geometry.coordinates[1];

return L.marker([lng,lat]).bindPopup(feature.properties.DATA+ '<br/>' + feature.properties.ESPOSIZIONE);

}

});

//Crea markers

var markers = new L.MarkerClusterGroup();

markers.addLayer(nidi);

//... Add more layers ...

//map.addLayer(markers);

// zomm sui nidi inseriti

        map.fitBounds(nidi.getBounds(), {

            padding: [50, 50]

        });

// Creo due oggetti con i riferimenti rispettivamente ai BaseLayers ed ai FeatureLayers

var baseMaps={

"Sfondo OSM": baseLayer,

};

var featureLayers={

"nidi": markers,

};

// Creo i controlli

L.control.layers(null, featureLayers,{collapsed:false}).addTo(map);

// Per un metodo moolto più succinto (che usa però Mapbox.js) guardare questo link: https://www.mapbox.com/mapbox.js/example/v1.0.0/toggle-baslayers/

 

If yyou know how to do that starting from origin.shp it' even better.

 

THANKS