    });

    ufAlertGroup = ufAlertDim.group();
    //this forEach method could be very expensive on write.
    ufAlertGroup.all().forEach(function(d) {
        //parse the json string created above
        d.key = JSON.parse(d.key);
    });
    
    // start the map in South-East England
    geojson_layer = L.geoJson(br_states, {
        onEachFeature: onEachFeature,
        style: function(feature) {
            l_name = feature.properties.nome;
            isoweek = $('#week').val();
            
       