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index.html
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<html>
<head>
<script type="text/javascript" src="js/raphael.min.js"></script>
<script type="text/javascript" src="js/leaflet/leaflet.js"></script>
<script type="text/javascript" src="js/stuquery.js"></script>
<script type="text/javascript" src="js/stuquery.hexmap.js"></script>
<link rel="stylesheet" href="js/leaflet/leaflet.css" />
<link rel="stylesheet" href="css/stuquery.hexmap.css">
<title>AutoHex</title>
<style>
body {
text-align: center;
margin: auto;
font-family: sans-serif;
}
#pageHolder {
margin: auto;
max-width: 800px;
}
p {
max-width: 800px;
text-align: left;
margin: auto;
}
#raphaelholder {
text-align: center;
margin: auto;
height: 720px;
}
#HexJSON {
font-size: small;
}
#areamapControls {
width: 320px;
margin: auto;
border: 0.1em solid #629b99;
}
#areamapControlsContent {
margin: 0.5em;
}
.selectionHolder {
display: inline-block;
text-align: center;
margin-left: auto;
margin-right: auto;
width: 320px;
margin: 0.8em;
border: 0.1em solid #629b99;
}
.selectionText {
background-color: #7bc1bf;
color: white;
padding: 0.2em 0.2em 0.3em 0.2em;
font-size: 1em;
}
.selectionContent {
margin-top: -3px;
width: 100%;
font-family: 'Arial';
font-size: 1.3em;
background-color: #ffffff;
}
#areamap {
width: 720px;
height: 500px;
pointer-events: none;
margin: 1em auto;
background-color: rgb(231, 229, 229);
}
#hexmapHolder {
width: 720px;
height: 720px;
margin: 1em auto;
padding-bottom: 2em;
}
.propertyChoiceHolder {
text-align: left;
margin: 0.3em auto 0.6em auto;
font-size: 0.8em;
}
.propertyChoiceLabel {
display: inline-block;
width: 55%;
text-align: right;
}
.sectionHolder {
display: none;
}
.center {
text-align: center;
}
#fileInput {
margin: 0.5em;
}
</style>
</head>
<body onload="bodyLoad()">
<div id="pageHolder">
<h1>AutoHex</h1>
<p class="center"><strong>Automatically convert GeoJSON to hexmaps.</strong></p>
<div class="selectionHolder">
<div class="selectionText">Select a GeoJSON File</div>
<div id="fileInput">
<input type="file" id="your-files">
</div>
</div>
<div id="areaMapHolder" class="sectionHolder">
<div id="areamapControls">
<div class="selectionText">Output options</div>
<div id="areamapControlsContent">
<div class="propertyChoiceHolder">
<div class="propertyChoiceLabel">Pick property for hex id:
</div>
<select id="idChoice" onchange="updateMap()"></select>
</div>
<div class="propertyChoiceHolder">
<div class="propertyChoiceLabel">Pick property for hex label:
</div>
<select id="nameChoice" onchange="updateMap()"></select>
</div>
<button id="startButton" onclick="start()">Start processing</button>
</div>
</div>
<h2>Area map</h2>
<div id="areamap"></div>
</div>
<div id="calculationHolder" class="sectionHolder">
<h2>Calculation grid</h2>
<div id="raphaelholder"></div>
<p id="score"></p>
</div>
<div id="resultsHolder" class="sectionHolder">
<h2>HexJSON output</h2>
<p id="HexJSON"></p>
<h2>Hexmap output</h2>
<div id="hexmapHolder">
</div>
</div>
</div>
</body>
<script>
var hexgrid = [];
var candidatepoints = [];
function bodyLoad() {
addFilePickerAction();
}
var map;
function createMap() {
areaMapHolder.style.display = "block";
// Load map layer
map = L.map('areamap', {
zoomControl: false,
scrollWheelZoom: false,
touchZoom: false,
}).setView([53.799762, -1.549042], 12);
}
var mapData;
function addFilePickerAction() {
var control = document.getElementById("your-files");
control.addEventListener("change", function (event) {
files = control.files;
setTimeout(function () {
newFilePicked();
}, 500);
}, false);
reader = new FileReader;
// When file loads
reader.onload = function (event) {
newDataLoaded();
};
}
function newDataLoaded() {
startButton.style.visibility = "hidden";
if (map == undefined) {
createMap();
}
mapData = JSON.parse(reader.result);
getProperties();
updateMap();
}
function updateMap() {
addNewMapLayer();
calculateCentroids();
addCentroidsToMap();
// Allow the map to be drawn before calculating fit
setTimeout(function () {
getCentroidsXY();
getIndexOfCentralFeature();
startButton.style.visibility = "visible";
}, 1000);
}
var files;
var reader;
// Event listener reads file as text
function newFilePicked() {
reader.readAsText(files[0]);
}
// Get the geoJSON feature properties and add them to selection
function getProperties() {
var layerProperties = Object.keys(mapData.features[0].properties);
nameChoice.innerHTML = "";
idChoice.innerHTML = "";
for (var i = 0; i < layerProperties.length; i++) {
var newPropertyName = document.createElement("option");
newPropertyName.value = layerProperties[i];
newPropertyName.innerHTML = layerProperties[i];
nameChoice.appendChild(newPropertyName);
var newPropertyId = document.createElement("option");
newPropertyId.value = layerProperties[i];
newPropertyId.innerHTML = layerProperties[i];
idChoice.appendChild(newPropertyId);
}
}
var mapCentroids;
var mapGeojson;
function addNewMapLayer() {
if (map.hasLayer(mapGeojson) == true) {
map.removeLayer(mapGeojson);
}
mapGeojson = L.geoJson(mapData, {
style: function (feature) {
return {
"fillOpacity": 0.4,
"weight": 3,
"fillColor": "orange",
"color": "orange"
};
},
onEachFeature: function (feature, layer) {
layer.bindPopup(feature.properties[nameChoice.value]);
}
}).addTo(map);
map.fitBounds(mapGeojson.getBounds());
map.setView(mapGeojson.getBounds().getCenter());
}
// Get the centroid of each polygon feature
function calculateCentroids() {
mapCentroids = [];
var features = mapGeojson.getLayers();
for (var i = 0; i < features.length; i++) {
mapCentroids.push({
"lat": features[i].getBounds().getCenter().lat,
"lng": features[i].getBounds().getCenter().lng,
"name": features[i].feature.properties[nameChoice.value],
"site_id": features[i].feature.properties[idChoice.value],
});
}
}
var locationsLayer;
// Add the centroids of each ward to the map
function addCentroidsToMap() {
if (map.hasLayer(locationsLayer) == true) {
map.removeLayer(locationsLayer);
}
var circleOptions = {
fillOpacity: 0.9,
weight: 1,
color: "red"
}
var markerList = [];
for (var i = 0; i < mapCentroids.length; i++) {
if (isNaN(mapCentroids[i]["lat"]) == false) {
var locationPoint = new L.circle([mapCentroids[i]["lat"], mapCentroids[i]["lng"]], 300, circleOptions);
markerList.push(locationPoint);
}
}
locationsLayer = L.featureGroup(markerList);
locationsLayer.addTo(map);
}
// Get the centroids position in pixels
function getCentroidsXY() {
var features = mapGeojson.getLayers();
for (var i = 0; i < features.length; i++) {
mapCentroids[i]["x"] = map.latLngToContainerPoint(features[i].getBounds().getCenter()).x;
mapCentroids[i]["y"] = map.latLngToContainerPoint(features[i].getBounds().getCenter()).y;
}
}
// Get the feature containing the central point of the layer, save the index of this.
function getIndexOfCentralFeature() {
var centralPoint = locationsLayer.getBounds().getCenter();
var smallestSeparation = Infinity;
var centroidPoints = locationsLayer.getLayers();
for (var i = 0; i < centroidPoints.length; i++) {
var currentSeparation = centroidPoints[i].getLatLng().distanceTo(centralPoint);
if (currentSeparation < smallestSeparation) {
smallestSeparation = currentSeparation;
indexOfOrigin = i;
}
}
}
var paper;
var totalscale = 1;
var indexOfOrigin;
function start() {
calculationHolder.style.display = "block";
calculationHolder.scrollIntoView();
setTimeout(function () {
iterationCount = 0;
bestcombinedscore = 10000000;
bestscale = "";
totalscale = 1;
if (paper != undefined) {
paper.clear();
} else {
paper = Raphael(document.getElementById('raphaelholder'), 780, 720);
}
candidatepoints = JSON.parse(JSON.stringify(mapCentroids));
createGrid(40);
scaleCandidates(5);
oneiteration();
}, 500);
}
var iterationCount = 0;
var bestcombinedscore = 10000000;
var bestscale = "";
function oneiteration() {
var score = 0;
var gridscore = 0;
moveCandidatesToOrigin(indexOfOrigin);
scaleCandidates(0.97);
moveCandidatesToCentre(indexOfOrigin);
score += Math.floor(assignhexestocandidates());
paper.clear();
drawGrid();
drawCandidates();
gridscore += calculateGridScore() / 100;
document.getElementById("score").innerHTML = "Score = " + score + " Gridscore = " + gridscore + "<br/>Best combined score = " + Math.round(bestcombinedscore) + " at scale " + Math.round(bestscale, 3);
combinedscore = gridscore * 2 + score;
if (combinedscore < bestcombinedscore) {
bestcombinedscore = combinedscore;
bestscale = totalscale;
}
iterationCount++;
if (iterationCount < 60) {
setTimeout(oneiteration, 80);
} else {
moveCandidatesToOrigin(indexOfOrigin);
scaleCandidates(bestscale / totalscale);
moveCandidatesToCentre(indexOfOrigin);
score += Math.floor(assignhexestocandidates());
paper.clear();
drawGrid();
drawCandidates()
createHEXJson();
}
}
function calculateGridScore() {
// boundingBox of all hexes
var gridscore = 0;
var gridhexes = paper.set();
for (i = 0; i < hexgrid.length; i++) {
if (hexgrid[i].assigned == true) {
var circle = paper.circle(hexgrid[i].x, hexgrid[i].y, 0);
circle.node.setAttribute('name', hexgrid[i].name);
circle.node.setAttribute('site_id', hexgrid[i].site_id);
gridhexes.push(circle);
}
}
gridscore = gridhexes.getBBox().width * gridhexes.getBBox().height;
gridhexes.clear();
return gridscore;
}
function createGrid(spacing) {
hexgrid = [];
for (x = 0; x < 18; x++) {
for (y = 0; y < 17; y++) {
var gridElement = new Object();
gridElement["x"] = x * spacing + 40 + (spacing * 0.5 * (y % 2));
gridElement["y"] = y * spacing + 40;
gridElement["assigned"] = false;
gridElement["name"] = null;
gridElement["site_id"] = null;
gridElement["q"] = x;
gridElement["r"] = y;
hexgrid.push(gridElement);
}
}
}
function drawGrid() {
var spacing = 40;
for (i = 0; i < hexgrid.length; i++) {
var circle = paper.circle(hexgrid[i].x, hexgrid[i].y, 10).attr("fill", gridcolour(hexgrid[i]));
circle.node.setAttribute('name', hexgrid[i].name);
circle.node.setAttribute('site_id', hexgrid[i].site_id);
}
}
function scaleCandidates(scale) {
totalscale = totalscale * scale;
for (i = 0; i < candidatepoints.length; i++) {
candidatepoints[i].x = candidatepoints[i].x * scale;
candidatepoints[i].y = candidatepoints[i].y * scale;
}
}
function gridcolour(arg) {
if (arg.assigned == true) {
return "yellow";
} else {
return "transparent";
}
}
function moveCandidatesToOrigin() {
originindex = 1;
destinationindex = 161;
deltax = 0 - candidatepoints[originindex].x;
deltay = 0 - candidatepoints[originindex].y;
for (i = 0; i < candidatepoints.length; i++) {
candidatepoints[i].x = candidatepoints[i].x + deltax;
candidatepoints[i].y = candidatepoints[i].y + deltay;
}
}
function moveCandidatesToCentre(originindex) {
destinationindex = 161;
deltax = hexgrid[destinationindex].x - candidatepoints[originindex].x;
deltay = hexgrid[destinationindex].y - candidatepoints[originindex].y;
for (i = 0; i < candidatepoints.length; i++) {
candidatepoints[i].x = candidatepoints[i].x + deltax;
candidatepoints[i].y = candidatepoints[i].y + deltay;
}
}
function drawCandidates() {
for (i = 0; i < candidatepoints.length; i++) {
var circle = paper.circle(candidatepoints[i].x, candidatepoints[i].y, 3).attr("fill", "red");
circle.node.setAttribute('name', candidatepoints[i].name);
}
}
function assignhexestocandidates() {
// reset all assigned flags
for (x = 0; x < hexgrid.length; x++) {
hexgrid[x].assigned = false;
hexgrid[x].name = null;
hexgrid[x].site_id = null;
}
var distancesum = 0;
for (x = 0; x < candidatepoints.length; x++) {
assignedhexindex = pickNearestTarget(x).bestindex;
distancesum += pickNearestTarget(x).distance;
hexgrid[assignedhexindex].assigned = true;
hexgrid[assignedhexindex].name = candidatepoints[x].name;
hexgrid[assignedhexindex].site_id = candidatepoints[x].site_id;
}
return distancesum;
}
function pickNearestTarget(candidateindex) {
var indexOfClosestGridPoint = -1;
var distance = 10000000;
for (i = 0; i < hexgrid.length; i++) {
if (hexgrid[i].assigned == false) {
var squaredistance = Math.pow(candidatepoints[candidateindex].x - hexgrid[i].x, 2) + Math.pow(candidatepoints[candidateindex].y - hexgrid[i].y, 2);
var newdistance = Math.sqrt(squaredistance);
if (newdistance < distance) {
distance = newdistance;
indexOfClosestGridPoint = i;
}
}
}
var returnObject = new Object();
returnObject["distance"] = distance;
returnObject["bestindex"] = indexOfClosestGridPoint;
return returnObject;
}
function createHEXJson() {
resultsHolder.style.display = "block";
resultsHolder.scrollIntoView();
// get lowest assigned r and q -- and set these an offset
var lowestr = 100;
var lowestq = 100;
for (x = 0; x < hexgrid.length; x++) {
if (hexgrid[x].assigned == true) {
if (hexgrid[x].r < lowestr) {
lowestr = hexgrid[x].r;
}
if (hexgrid[x].q < lowestq) {
lowestq = hexgrid[x].q;
}
}
}
hexJSONOutput = new Object();
if (lowestr % 2 == 0) {
hexJSONOutput["layout"] = "odd-r";
} else {
hexJSONOutput["layout"] = "even-r";
}
hexJSONOutput["hexes"] = new Object();
// now output the hexjson
for (x = i; i < hexgrid.length; i++) {
if (hexgrid[i].assigned == true) {
var hexObject = new Object();
hexObject["n"] = hexgrid[i].name;
hexObject["q"] = hexgrid[i].q - lowestq;
hexObject["r"] = lowestr - hexgrid[i].r;
hexJSONOutput["hexes"][hexgrid[i].site_id] = hexObject;
}
}
document.getElementById("HexJSON").innerHTML = JSON.stringify(hexJSONOutput);
drawHexmap();
}
function drawHexmap() {
if (hexmapHolder.children.length > 0) {
hexmapHolder.removeChild(hexmapHolder.children[0]);
}
var newHexmapCode = document.createElement("code");
newHexmapCode.innerHTML = JSON.stringify(hexJSONOutput);
hexmapHolder.appendChild(newHexmapCode);
// Create an object attached to a DOM element with the ID "hexmap-1"
var newHexmap = S.hexmap('hexmapHolder', {
'formatLabel': function (id, hex) {
return hex.n;
}
});
// Position the hexes and scale them to the container
newHexmap.positionHexes().resize();
}
</script>
</html>