gis-tutorials/leaflet-full-example.html at master · ovrdc/gis-tutorials · GitHub

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<!DOCTYPE html>
<html>

<head>
	<title>Leaflet Map Intro</title>
	<meta charset="utf-8" />
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<!-- Leaflet -->
	<link rel="stylesheet" href="_leaflet/plugins/leaflet/leaflet.css" />
	<script src="_leaflet/plugins/leaflet/leaflet.js"></script>
	<script src="https://api.mapbox.com/mapbox.js/plugins/leaflet-hash/v0.2.1/leaflet-hash.js"></script>
	<!-- Omnivore -->
	<script src="_leaflet/plugins/omnivore/leaflet-omnivore.min.js"></script>
	<!-- Search -->
	<link rel="stylesheet" href="_leaflet/plugins/search/leaflet-search.min.css" />
	<script src="_leaflet/plugins/search/leaflet-search.min.js"></script>
	<!--Choropleth -->
	<script src="_leaflet/plugins/choropleth/choropleth.js"></script>
	<!--Turf -->
	<script src="_leaflet/plugins/turf/turf.min.js"></script>
	<style>
		body,
		html {
			height: 100%;
			width: 100%;
			margin: 0;
		}

		#map {
			width: 100%;
			height: 100%;
			background: whitesmoke;
		}
	</style>
</head>

<body>
	<div id="map"></div>
	<script>
		var map = L.map("map");

		map.setView([40.3, -96.6], 5);

		L.hash(map);

		L.control.scale().addTo(map);

		var layerControl = L.control.layers().addTo(map);

		/*Easily add basemaps or baselayers with L.tileLayer
		WMS layers can also be added with L.tileLayer.wms */

		var tileUrl = 'https://{s}.tile.openstreetmap.fr/hot/{z}/{x}/{y}.png';
		var attribution = '© OpenStreetMap, Tiles courtesy of Humanitarian OpenStreetMap Team';

		var OpenStreetMap_HOT = L.tileLayer(tileUrl, {
			maxZoom: 19,
			attribution: attribution,
			opacity: 0.8
		}).addTo(map);

		layerControl.addBaseLayer(OpenStreetMap_HOT, "Streets");

		var url = "tutorial-data/counties.topojson";

		var counties = L.geoJson(null, {
			style: function(feature) {
				switch (feature.properties.winner) {
					case "Trump":
						return {
							fillColor: "red",
							fillOpacity: 0.4,
							color: 'white',
							weight: 1
						}
					default:
						return {
							fillColor: "blue",
							fillOpacity: 0.4,
							color: 'white',
							weight: 1
						}
				}
			},
			onEachFeature: function(feature, county) {
				var info = county.feature.properties.NAME +
					"<br>" + county.feature.properties.winner;
				county.bindPopup(info);
			}
		}).addTo(map);

		layerControl.addOverlay(counties, "Counties");

		var cData = omnivore.topojson(url, null, counties);

		// Once our county data is loaded,
		// add search functionality using
		// leaflet-search with default settings

		var choropleth;

		// Choropleth

		cData.on("ready", function() {
			//map.removeLayer(counties);
			choropleth = L.choropleth(cData.toGeoJSON(), {
				valueProperty: "POP_SQMI", // which property in the features to use
				scale: ["white", "#006d2c"], // chroma.js scale - include as many as you like
				steps: 7, // number of breaks or steps in range
				mode: "q", // q for quantile, e for equidistant, k for k-means
				style: {
					color: "#fff", // border color
					weight: 1,
					fillOpacity: 0.9
				},
				onEachFeature: function(feature, layer) {
					layer.bindTooltip(feature.properties.NAME + "<br>" + feature.properties.POPULATION)
				}
			});
			layerControl.addOverlay(choropleth, "Choropleth");
		});

		var url2 = "tutorial-data/airports.geojson"

		var aStyle = {
			color: "black",
			radius: 5,
			weight: 0,
			fillOpacity: 1,
			pane: "markerPane"
		};

		var airports = L.geoJson(null, {
			pointToLayer: function(feature, latlng) {
				return L.circleMarker(latlng, aStyle)
			}
		});

		var aData = omnivore.geojson(url2, null, airports);

		var airportJson;

		aData.on('ready', function() {
			aData.toGeoJSON();
			airportJson = aData.toGeoJSON();
		});

		var highlightStyle = {
			color: "goldenrod",
			fillColor: "goldenrod",
			opacity: 1,
			fillOpacity: 1,
			pane: "markerPane"
		}

		var highlight = new L.geoJson(null, {
			pointToLayer: function(feature, latlng) {
				return new L.circleMarker(latlng, highlightStyle)
			}
		}).addTo(map);

		counties.on("mouseover", function(e) {
			highlight.clearLayers();
			var selLayer = new L.geoJson(e.layer.toGeoJSON());
			var within = turf.within(airportJson, selLayer.toGeoJSON());
			highlight.addData(within);
		});

		/*var countyPoints = L.geoJson(null, {
			pane: 'makerPane'
		}).addTo(map);
		layerControl.addOverlay(countyPoints, "Winner Percentage * Population")
		var x = 0;
		var r = 1;
		var v = 1;
		var c = 'gray';
		var o = 0.7;
		cData.on('ready', function(data) {
			counties.eachLayer(function(layer) {
				var center = turf.centerOfMass(layer.toGeoJSON());
				if (x == 0) {console.log(center);}
				x = 1;
				if (layer.feature.properties.winner == 'Trump') {
					v = ((layer.feature.properties.POPULATION) * (layer.feature.properties["per_gop"]));
					r = v/60000;
					c = 'red';
					o = layer.feature.properties["per_gop"]
				}
				if (layer.feature.properties.winner == 'Hillary') {
					v = ((layer.feature.properties.POPULATION) * (layer.feature.properties["per_dem"]));
					r = v/60000;
					c = 'blue';
					o = layer.feature.properties["per_dem"]
				}
				if (r < 1 ) {r = 1}
				var marker = L.circleMarker([center.geometry.coordinates[1],center.geometry.coordinates[0]], {radius: r, opacity: o, fillOpacity: o, color: c, fillColor: c});
				marker.bindPopup('County Population * Percent of Winner Vote: ' + v.toFixed(0));
				countyPoints.addLayer(marker);
			})
		});*/
	</script>
</body>

</html>