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index.html
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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Hill Finder</title>
<meta name="description" content="Find hills anywhere in the world.">
<meta name="author" content="Ryan Alexander">
<script src="https://api.mapbox.com/mapbox-gl-js/v2.0.0/mapbox-gl.js"></script> <!-- map -->
<link href="https://api.mapbox.com/mapbox-gl-js/v2.0.0/mapbox-gl.css" rel="stylesheet" />
<script src="https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-geocoder/v4.5.1/mapbox-gl-geocoder.min.js"></script> <!-- geocoder -->
<link rel="stylesheet" href="https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-geocoder/v4.5.1/mapbox-gl-geocoder.css" type="text/css" />
<script src="https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-draw/v1.2.0/mapbox-gl-draw.js"></script> <!-- polygon drawer -->
<link rel="stylesheet" href="https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-draw/v1.2.0/mapbox-gl-draw.css" type="text/css"/>
<style type="text/css">
#body {
margin: 0;
padding: 0;
}
#map {
position: absolute;
top: 0; bottom: 0;
left:0; right:0;
width: 100%;
}
#menu {
position: absolute;
margin-top: 0px;
margin-left: 0px;
background: #fff;
border-radius: 4px;
box-shadow: 0px, 0px, 0px, 0px rgb(136, 136, 136);
-webkit-box-shadow: 0px 0px 6px 0px rgb(136, 136, 136);
padding: 6px;
font-family: 'Open Sans', sans-serif;
}
</style>
</head>
<body>
<div id="map"></div> <!-- map -->
<div id="menu"> <!-- style picker -->
<input id="streets-v11" type="radio" name="rtoggle" value="streets" />
<label for="streets-v11">Streets</label>
<input id="outdoors-v11" type="radio" name="rtoggle" value="outdoors" checked="checked"/>
<label for="outdoors-v11">Outdoors</label>
<input id="satellite-v9" type="radio" name="rtoggle" value="satellite" />
<label for="satellite-v9">Satellite</label>
</div>
<script>
mapboxgl.accessToken = "pk.eyJ1IjoiZHluYW1pY2R1Y2siLCJhIjoiY2tpeHNjemV1M3U4NzJxbGJ3cHdudmJneiJ9.WiaSu7K-1gCvipLv-BR3pA"; // public API key
var map = new mapboxgl.Map({
container: "map",
style: "mapbox://styles/mapbox/outdoors-v11", // stylesheet location
center: [0, 51.4769], // starting position [lat, lng]
zoom: 14
});
var layerList = document.getElementById('menu');
var inputs = layerList.getElementsByTagName('input');
function switchLayer(layer) {
var layerId = layer.target.id;
map.setStyle('mapbox://styles/mapbox/' + layerId);
}
for (var i = 0; i < inputs.length; i++) {
inputs[i].onclick = switchLayer;
}
map.addControl( // geocoder
new MapboxGeocoder({
accessToken: mapboxgl.accessToken,
mapboxgl: mapboxgl}));
var draw = new MapboxDraw({ // polygon drawer
displayControlsDefault: false,
controls: {
polygon: true,
trash: true}});
map.addControl(draw);
function get_geom() { // outputs geometry of polygon
var data = draw.getAll();
geom = data["features"]["0"]["geometry"]; // needs changing to support multiple polygons
return geom;
}
function get_corners(geom) { // get corners of a square that covers entire polygon
var coords = geom["coordinates"]["0"];
var points = coords.length;
var i;
var north, east, south, west;
east = west = coords["0"]["0"];
north = south = coords["0"]["1"];
for (i = 1; i < (points - 1); i++) {
coord = coords[String(i)]
if (coord["1"] > north) {
north = coord["1"];
}
else if (coord["1"] < south) {
south = coord["1"];
}
if (coord["0"] > east) {
east = coord["0"];
}
else if (coord["0"] < west) {
west = coord["0"];
}
}
var corners = [[west, north], [east, north], [east, south], [west, south]];
return corners;
}
</script>
</body>
</html>