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<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Geo Coordinates Conversion</title>
<link rel="icon" href="data:,">
<style>
* {
font-family: Helvetica, Arial, sans-serif;
}
body {
font-size: 5.8vmin;
xbackground-color: #f6f6f6;
}
button {
font-size: inherit;
padding: 0.1em 0.5em;
cursor: pointer;
}
section {
padding: 0.2em;
max-width: 100vmin;
}
h1 {
margin: 0.1em 0;
font-size: 1.8em;
}
button.track {
font-size: max(80%,20px);
width: 4em;
}
button.fullscreen {
font-size: max(100%,25px);
}
/* Layout */
h1 {
display: flex;
}
h1 .label {
flex: 0 0 3.2em;
}
h1 .value {
flex: 1 0 4em;
justify-content: flex-end;
text-align: right;
}
h1 .unit {
flex: 0 0 0.5em;
}
header {
display: flex;
flex-direction: row;
gap: 0.5em;
}
body {
display: flex;
flex-direction: column;
justify-content: flex-start;
column-gap: 0.7em;
row-gap: 0.5em;
}
header {
flex: 0 0 1.5em;
padding: 0.2em;
}
main {
flex-grow: 0;
display: flex;
flex-direction: column;
}
.fullscreen {
margin-left: auto;
}
@media (min-aspect-ratio: 1.3) {
body {
flex-direction: row;
font-size: 5.6vmin;
}
header {
flex-direction: column;
}
main {
/* This would center it, but looks weird */
/* margin: auto; */
}
.fullscreen {
margin-left: 0;
}
}
/* Styling */
.show-crs-chooser {
border: 0.5px solid #fff;
border-radius: 0.2em;
margin: -0.2em;
padding: 0.2em;
cursor: pointer;
}
.show-crs-chooser::before {
content: '▼';
font-size: 70%;
vertical-align: 15%;
}
.show-crs-chooser:hover {
border-color: #bbb;
}
dialog::backdrop {
background-color: #ffffff;
opacity: 0.5;
}
/* set display flex only for *open* dialog, to make close() work */
.crs-chooser[open] {
display: flex;
}
.crs-chooser {
/* display: flex; */
box-sizing: border-box;
flex-direction: column;
font-size: 60%;
font-size: max(60%,18px);
margin: 1.2em;
padding: 0;
height: calc(100vh - 2.4em);
width: calc(100vw - 2.4em);
border: 1px solid #ddd;
box-shadow: 0 0 0.3em -0.1em;
}
.crs-chooser form {
padding: 1em;
flex-grow: 0;
}
.crs-chooser form label {
font-size: 80%;
}
.crs-chooser form input[type="text"] {
box-sizing: border-box;
font-size: inherit;
width: 100%;
padding: 0.2em;
}
.crs-chooser form input[type="checkbox"] {
font-size: 60%;
width: 1em;
height: 1em;
}
.crs-chooser .crs-list {
flex-grow: 1;
list-style-type: none;
padding-left: 0;
padding: 0 1em 1em;
margin: 0;
overflow: auto;
}
.crs-chooser .crs-list li {
border: 1px solid #ddd;
border-bottom: none;
padding: 0.3em;
cursor: pointer;
}
.crs-chooser .crs-list li:last-child {
border-bottom: 1px solid #ddd;
}
.crs-chooser .crs-list li:hover {
background-color: #f6f6f6;
}
.crs-chooser .checkbox-wrapper {
line-height: 0.9;
margin: 0.3em 0 0;
}
.crs-chooser .close-button {
position: absolute;
top: -0.1em;
right: 0.2em;
cursor: pointer;
}
.crs-chooser .close-button::before {
content: '×';
font-size: 1.2em;
color: #999;
}
.track .light {
width: 1em;
height: 0.33em;
background-color: #ff0000;
display: block;
margin: 0.33em auto;
vertical-align: 0.15em;
}
.paused .track .light {
background-color: #aa0000;
}
.tracking .track .light {
background-color: #00dd00;
box-shadow: 0 0 0.2em -0.04em #00dd00;
}
.error .track .light {
animation: connecting 0.5s 3;
animation-timing-function: steps(6);
background-color: #ff3300;
box-shadow: 0 0 0.2em -0.04em #ff3300;
}
@keyframes connecting {
0%, 66% {
background-color: #fff197;
box-shadow: 0 0 0.2em 0 #fff197;
}
67%, 100% {
background-color: #aa0000;
box-shadow: none;
}
}
button {
background-color: #e5e5e5;
border: 1px solid #9999;
border-radius: 0.1em;
}
header button {
min-height: 2em;
}
:fullscreen button.fullscreen {
background-color: transparent;
border-color: transparent;
color: #dddddd;
}
footer {
position: fixed;
z-index: 1;
bottom: 0;
right: 0;
padding: 0.3em 0.6em;
text-align: right;
font-size: 11px;
color: #999;
}
footer a {
text-decoration: none;
color: inherit;
}
</style>
</head>
<body class="paused">
<header>
<button class="track"><div class="light"></div>GPS</button>
<button class="fullscreen">⛶</button>
<!--<button class="settings">Settings</button>-->
</header>
<main>
<dialog id="crs-chooser" class="crs-chooser">
<div class="close-button"></div>
<form>
<div>
<input type="text" class="crs-search" id="crs-search" placeholder="🔍︎ Search" autocomplete="off">
</div>
<div class="checkbox-wrapper">
<input type="checkbox" id="crs-bounds-only" checked> <label for="crs-bounds-only">Only include CRS defined for the current position</label>
</div>
</form>
<ul class="crs-list">
<!--
<li>EPSG:4326 (WGS-84)</li>
<li>EPSG:31256 (Austria GK East)</li>
-->
</ul>
</dialog>
</main>
<template id="crsDisplayTemplate">
<section class="crs-display">
<div class="show-crs-chooser">
<span class="crs-title">--</span><!-- <button class="info">i</button> -->
</div>
<h1 class="coords-east"><span class="label">East:</span> <span class="value">--</span><span class="unit"></span></h1>
<h1 class="coords-north"><span class="label">North:</span> <span class="value">--</span><span class="unit"></span></h1>
</section>
</template>
<footer><a href="//cartolab.at/">cartolab.at</a></footer>
<script type="module">
// make sure we're running https - needed for GPS API access
if (location.protocol !== 'https:' && !["localhost","127.0.0.1","0.0.0.0"].includes(location.hostname)) {
location.replace(`https:${location.href.substring(location.protocol.length)}`);
}
async function importUMD(url, module = {exports:{}}) {
return (Function('module', 'exports', await (await fetch(url)).text()).call(module, module, module.exports), module).exports;
}
// "import proj from ..." works as well, but loads hundreds of small files
// ==> load locally saved UMD packaged module instead
//import proj from "https://unpkg.com/proj4@2.9.0/lib/index.js?module";
const proj = await importUMD("proj4_2.9.0.js");
let geoWatchID = null;
document.querySelector("button.track").addEventListener("click", e => {
if (document.body.classList.contains("error")) {
document.body.classList.remove("error");
document.body.classList.add("paused");
if (geoWatchID) {
navigator.geolocation.clearWatch(geoWatchID);
geoWatchID = null;
}
return;
}
if (!geoWatchID) {
geoWatchID = navigator.geolocation.watchPosition(updatePosition, positionError, {
enableHighAccuracy: false,
maximumAge: 0
});
document.body.classList.remove("paused");
document.body.classList.add("tracking");
}
else {
navigator.geolocation.clearWatch(geoWatchID);
geoWatchID = null;
document.body.classList.remove("tracking");
document.body.classList.add("paused");
}
});
document.querySelector("button.fullscreen").addEventListener("click", e => {
if (document.fullscreenElement) {
document.exitFullscreen();
}
else {
document.documentElement.requestFullscreen();
}
});
let crsChooser = (() => {
let chooserEl = document.getElementById("crs-chooser");
chooserEl.querySelector(".close-button").addEventListener("click", e => {
chooserEl.close();
});
let searchBoxEl = chooserEl.querySelector("#crs-search");
let boundsCheckboxEl = chooserEl.querySelector("#crs-bounds-only");
searchBoxEl.addEventListener("input", filterName);
boundsCheckboxEl.addEventListener("click", filterBoundsAndName);
function filterBoundsAndName() {
if (boundsCheckboxEl.checked) {
availableCRS = allCRS.filter(crs =>
position[1] < crs.bbox[0] &&
position[0] > crs.bbox[1] &&
position[1] > crs.bbox[2] &&
position[0] < crs.bbox[3]
);
}
else {
availableCRS = allCRS;
}
filterName();
}
function filterName() {
if (availableCRS) {
let str = searchBoxEl.value.trim().toLowerCase();
let filteredCRS = availableCRS;
if (str) {
filteredCRS = filteredCRS.filter(d => (d.code+"").includes(str) || d.name.toLowerCase().includes(str));
}
updateCRSList(filteredCRS);
}
}
chooserEl.addEventListener('click', event => {
if (event.target === event.currentTarget) {
event.currentTarget.close();
}
})
let callback = null;
let allCRS = null;
let availableCRS = null;
let filterPosition = null;
function updateCRSList(crsList) {
let ul = chooserEl.querySelector(".crs-list");
ul.innerHTML = "";
for (let crs of crsList) {
let li = document.createElement("li");
li.innerHTML = "EPSG:" + crs.code + " (" + crs.name + ")";
ul.appendChild(li);
li.addEventListener("click", e => {
chooserEl.close();
callback?.(crs);
});
}
}
return {
close: () => {
callback = null;
chooserEl.close();
},
show: (position, _callback) => {
//chooserEl.querySelector("#crs-search").value = "";
callback = _callback;
filterBoundsAndName();
chooserEl.showModal();
},
setCRSList: crs => {
allCRS = crs;
}
}
})();
let position = null;
let displays = [];
//let baseURL = "https://unpkg.com/epsg-index@1.3.0/s/";
// for local dev
let baseURL = "crs_data/";
let initialCRS = [4326,4326];
if (window.location.hash && window.location.hash.length > 4) {
initialCRS = window.location.hash.substring(1).split(",").map(d => +d || 4326).filter(d => d > 0);
}
Promise.all(initialCRS.map(d => fetch(baseURL + d + ".json").then(r => r.json())))
.then((dataArray) => {
//console.log(fromCRS.name);
let crsDisplayTemplate = document.getElementById("crsDisplayTemplate").content.firstElementChild;
displays = dataArray.map(d =>
({
data: d,
proj: proj(d.proj4),
unit: d.unit,
el: crsDisplayTemplate.cloneNode(true)
}));
let container = document.querySelector("main");
for (let [index, display] of Object.entries(displays)) {
container.appendChild(display.el);
display.el.querySelector(".crs-title").textContent = /*"EPSG:" + dataArray[index].code + " " +*/ dataArray[index].name;
display.el.querySelector(".show-crs-chooser").addEventListener("click", e => {
crsChooser.show(position, (selectedCRSMeta) => {
if (!selectedCRSMeta) return;
display.el.querySelector(".crs-title").textContent = "... loading data ...";
display.el.querySelector(".coords-east .value").textContent = "";
display.el.querySelector(".coords-north .value").textContent = "";
fetch(baseURL + selectedCRSMeta.code + ".json").then(r => r.json()).then(data => {
Object.assign(display, {
data: data,
proj: proj(data.proj4),
unit: data.unit
});
display.el.querySelector(".crs-title").textContent = /*"EPSG:" + data.code + " " +*/ data.name;
updatePosition(position);
});
});
});
}
console.log(displays);
updatePosition([16.3738, 48.2082]);
});
let allCRS = null;
fetch("allEPSG.csv").then(r => r.text()).then(txt => {
allCRS = txt.split("\n").map(l => l.split(",")).map(arr => ({
code: +arr[0],
kind: arr[1]=="P" ? "PROJECTED" : "GEO",
name: arr[2].replace(/;/g,","),
bbox: arr[3].trim()=="-" ? [90,-180,-90,180] : arr[3].split(";").map(s => +s)
}));
//let pos = [16.3738, 48.2082];
console.log(allCRS);
crsChooser.setCRSList(allCRS);
});
function updatePosition(pos) {
if (!Array.isArray(pos)) {
// convert position received from API
pos = [pos.coords.longitude, pos.coords.latitude];
}
position = pos;
for (let d of displays) {
let coords_1 = d.proj.forward(pos);
let digits = d.unit?.startsWith("degree") ? 6 : 2;
let unit = d.unit?.startsWith("degree") ? "°" :"";
let east = isNaN(coords_1[0]) ? "<invalid>" : coords_1[0].toFixed(digits);
let north = isNaN(coords_1[1]) ? "<invalid>" : coords_1[1].toFixed(digits);
d.el.querySelector(".coords-east .value").textContent = east;
d.el.querySelector(".coords-north .value").textContent = north;
for (let el of d.el.querySelectorAll(".unit")) {
el.textContent = unit;
}
}
}
function positionError(err) {
console.log(err);
if (geoWatchID) {
navigator.geolocation.clearWatch(geoWatchID);
geoWatchID = null;
}
document.body.classList.remove("tracking");
document.body.classList.add("error");
}
</script>
</body>
</html>