$.getJSON("https://data.ct.gov/resource/v4tt-nt9n.geojson?&$$app_token=QVVY3I72SVPbxBYlTM8fA7eet", function(data) {
  
  var geoJsonLayer = L.geoJson(data, {
    pointToLayer: function(feature, latlng) {
      return L.circleMarker(latlng, {
        radius: 6,
        fillColor: 'blue',
        color: 'blue',
        weight: 2,
        opacity: 1,
        fillOpacity: 0.7
      }).bindPopup(feature.properties.name + '<br>' + feature.properties.district_name);
    }
  }).addTo(map);

  controlLayers.addOverlay(geoJsonLayer, 'Public Schools (CT Open Data-Socrata)');

});

var bikeRoutes = L.esri.featureLayer({
  url: 'https://gis1.hartford.gov/arcgis/rest/services/OpenData_Community/MapServer/9',
  style: function(feature) {
    if (feature.properties.TYPE === 'Bike Lane') {
      return {color: 'green', weight: 3 };
    } else {
      return { color: 'blue', weight: 3 };
    }
  }
}).addTo(map);

controlLayers.addOverlay(bikeRoutes, 'Bike Routes (Hartford Open Data-ArcGIS Online)');