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script.js
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script.js
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// Edit the center point and zoom level
var map = L.map('map', {
center: [41.761, -72.741], // West Hartford Center
zoom: 14,
scrollWheelZoom: false
});
// set bounds for geocoder
var minLatLng = [41.71468781859272, -72.79833198522446];
var maxLatLng = [41.811104546836134, -72.71164299040684];
var bounds = L.latLngBounds(minLatLng, maxLatLng);
var choroplethLayer;
var choroplethOpacity = 0.7;
// toggle baselayers; global variable with (null, null) allows indiv layers to be added inside functions below
var controlLayers = L.control.layers( null, null, {
position: "topright",
collapsed: false
}).addTo(map);
//baselayers
var zoning1924 = new L.tileLayer('https://mapwarper.net/maps/tile/56736/{z}/{x}/{y}.png', {
attribution: '1924 <a href="https://mapwarper.net/maps/56736">West Hartford Zoning Map</a>'
}).addTo(map); // adds layer by default
controlLayers.addBaseLayer(zoning1924, '1924 zoning map');
// UConn MAGIC WMS settings - see http://geoserver.lib.uconn.edu:8080/geoserver/web/?wicket:bookmarkablePage=:org.geoserver.web.demo.MapPreviewPage
var zoning1930 = new L.tileLayer.wms("http://geoserver.lib.uconn.edu:8080/geoserver/MAGIC/wms?", {
layers: 'MAGIC:WestHartford_Zoning_1930',
format: 'image/png',
version: '1.3.0',
transparent: true,
attribution: '<a href="http://magic.library.uconn.edu" target="_blank">1930 MAGIC UConn</a> and Town of West Hartford</a>'
});
controlLayers.addBaseLayer(zoning1930, '1930 zoning map');
var zoning1951 = new L.tileLayer.wms("http://geoserver.lib.uconn.edu:8080/geoserver/MAGIC/wms?", {
layers: 'MAGIC:WestHartford_Zoning_1951',
format: 'image/png',
version: '1.3.0',
transparent: true,
attribution: '<a href="http://magic.library.uconn.edu" target="_blank">1951 MAGIC UConn</a> and Town of West Hartford</a>'
});
controlLayers.addBaseLayer(zoning1951, '1951 zoning map');
var zoning1960 = new L.tileLayer.wms("http://geoserver.lib.uconn.edu:8080/geoserver/MAGIC/wms?", {
layers: 'MAGIC:WestHartford_Zoning_1960',
format: 'image/png',
version: '1.3.0',
transparent: true,
attribution: '<a href="http://magic.library.uconn.edu" target="_blank">1960 MAGIC UConn</a> and Town of West Hartford</a>'
});
controlLayers.addBaseLayer(zoning1951, '1951 zoning map');
var zoning1970 = new L.tileLayer.wms("http://geoserver.lib.uconn.edu:8080/geoserver/MAGIC/wms?", {
layers: 'MAGIC:WestHartford_Zoning_1970',
format: 'image/png',
version: '1.3.0',
transparent: true,
attribution: '<a href="http://magic.library.uconn.edu" target="_blank">1970 MAGIC UConn</a> and Town of West Hartford</a>'
});
controlLayers.addBaseLayer(zoning1970, '1970 zoning map');
var zoning1988 = new L.tileLayer.wms("http://geoserver.lib.uconn.edu:8080/geoserver/MAGIC/wms?", {
layers: 'MAGIC:WestHartford_Zoning_1988',
format: 'image/png',
version: '1.3.0',
transparent: true,
attribution: '<a href="http://magic.library.uconn.edu" target="_blank">1988 MAGIC UConn</a> and Town of West Hartford</a>'
});
controlLayers.addBaseLayer(zoning1988, '1988 zoning map');
var zoning2016 = new L.tileLayer('https://mapwarper.net/maps/tile/56738/{z}/{x}/{y}.png', {
attribution: '2016 <a href="https://mapwarper.net/maps/56738">West Hartford Zoning Map</a>'
});
controlLayers.addBaseLayer(zoning2016, '2016 zoning map');
var presentStreets = new L.tileLayer('https://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}{r}.png', {
attribution: '© <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors © <a href="https://carto.com/attributions">CARTO</a>',
subdomains: 'abcd',
maxZoom: 19
});
controlLayers.addBaseLayer(presentStreets, 'Present Streets');
// https://esri.github.io/esri-leaflet/api-reference/layers/basemap-layer.html
var esriImagery = L.esri.basemapLayer('Imagery');
var esriTransportation = L.esri.basemapLayer('ImageryTransportation');
var esriLabels = L.esri.basemapLayer('ImageryLabels');
var presentAerial = L.layerGroup([esriImagery, esriTransportation, esriLabels]);
controlLayers.addBaseLayer(presentAerial, 'Present Aerial');
var searchControl = L.esri.Geocoding.geosearch({
placeholder: "Search the Hartford area...",
searchBounds: bounds
}).addTo(map);
// Prepend attribution to "Powered by Esri"
map.attributionControl.setPrefix('View\
<a href="https://github.com/ontheline/otl-zoning-west-hartford" target="_blank">sources and code on GitHub</a>,\
created with ' + map.attributionControl.options.prefix);
var results = L.layerGroup().addTo(map);
searchControl.on('results', function (data) {
results.clearLayers();
for (var i = data.results.length - 1; i >= 0; i--) {
results.addLayer(L.marker(data.results[i].latlng));
}
});
L.control.scale().addTo(map);
// https://colorbrewer2.org/#type=sequential&scheme=YlGn&n=9
// use lower range in order to roughly match with otl-zoning-metro-hartford
var choroplethStyle = function(f) {
var area2color = {
'A': '#78c679', // green
'B': '#addd8e', //
'C': '#d9f0a3', //
'D': '#f7fcb9', //
'E': '#ffffe5', // light yellow
}
return {
'color': 'black',
'weight': 1,
'fillColor': area2color[ f.properties.area ] || 'gray', // gray if no data
'fillOpacity': choroplethOpacity
}
}
// zoning polygons with fillColor
$.getJSON("geojson/wh-area-districts-1924-whitten.geojson", function (data) {
choroplethLayer = L.geoJson(data, {
style: choroplethStyle
}).addTo(map);
map.fitBounds(choroplethLayer.getBounds())
});
// zoning points with colored numeric markers; see also style.css
$.getJSON("geojson/wh-area-markers-1924-whitten.geojson", function (data){
L.geoJson(data, {
pointToLayer: function( feature, latlng) {
var mIcon = L.ExtraMarkers.icon({
icon: 'fa-number',
number: feature.properties.area,
markerColor: 'black'
});
var marker = L.marker(latlng, {icon: mIcon});
return marker;
}
}).addTo(map);
});
// Add Opacity control
var opacity = L.control({position: 'topright'});
opacity.onAdd = function (map) {
var div = L.DomUtil.create('div', 'control-custom range');
div.innerHTML = '<h4>Opacity: 1924 zones</h4>';
div.innerHTML += '<input id="rangeSlider" type="range" min="0" max="100" value="70">';
// Make sure the map doesn't move with slider change
L.DomEvent.disableClickPropagation(div);
return div;
};
opacity.addTo(map);
$('#rangeSlider').on('input', function() {
choroplethOpacity = $(this).val() / 100;
if (choroplethLayer) {
choroplethLayer.setStyle(choroplethStyle);
}
})
// add custom legend https://www.figma.com/file/7JitgyYxiT3xR3fyoZttKb/otl-zoning-graphics
var legend = L.control({position: 'bottomright'});
legend.onAdd = function(map) {
var div = L.DomUtil.create('div', 'info legend');
div.innerHTML += '<img src="./1924-zoning-legend.png" alt="1924 Zoning Legend" width="110">';
return div;
};
legend.addTo(map);