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index.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="content-type" content="text/html;charset=utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="author" content="Javier Jimenez Shaw">
<title>CRS Explorer - PROJ</title>
<style>
body { font-family: Lato,proxima-nova,Helvetica Neue,Arial,sans-serif; color: #202020 }
thead { font-weight: bold; }
th { cursor: pointer; background-color: #DDD; }
label { white-space: nowrap; }
a { text-decoration: none; }
a:hover { text-decoration: underline; }
.screen-msg { display: none; }
@media only screen and (max-width: 480px) {
th:nth-child(3), th:nth-child(4), th:nth-child(6),
td:nth-child(3), td:nth-child(4), td:nth-child(6) {
display: none
}
.screen-msg { display: unset; }
}
#mapid { height: 400px; width: 800px; max-width: 80%; }
.sticky { position: sticky; top: 0; }
.area { text-overflow: ellipsis; white-space: nowrap; overflow: hidden; width: 20em; display: block; }
.hide { display: none; }
.odd { background-color: #EEEEEE; }
.order { color: #777; font-size: small; padding-left: 0.5em; }
.loader-text { color: darkred; }
.message-text { color: darkred; }
.wkts_cell { white-space: nowrap; }
.wkt1 { margin-right: 0.3em; }
.sr-icon { vertical-align: text-bottom; }
td, th { padding-left: 0.25em; padding-right: 0.25em; }
.circle {
background-color: #3388ff; /* For browsers that do not support gradients */
background-image: radial-gradient(#ccdaed, #3388ff, #3388ff);
border-radius: 50%; /* make the div a circular shape */
cursor: ne-resize !important;
}
</style>
<link rel="stylesheet" href="https://unpkg.com/[email protected]/dist/leaflet.css"/>
<script src="https://unpkg.com/[email protected]/dist/leaflet.js"></script>
<link rel="icon" type="image/x-icon" href="./favicon.ico"/>
<base target="_blank">
<meta name="google-site-verification" content="MhCjgTBKAzLd1y46INE_vmHIiJ_TLHrDc98XC_jYB14" />
</head>
<body onload="load()">
<h1>CRS Explorer - PROJ <span id="proj_version">9.5.0</span> codes</h1>
<div>
<label for="version">PROJ version: </label>
<select name="version" id="version" onchange="versionChanged(this)">
<option value="latest">latest</option>
<option value="9.5.0">9.5.0</option>
<option value="9.4.1">9.4.1</option>
<option value="9.4.0">9.4.0</option>
<option value="9.3.1">9.3.1</option>
<option value="9.3.0">9.3.0</option>
<option value="9.2.1">9.2.1</option>
<option value="9.2.0">9.2.0</option>
<option value="9.1.1">9.1.1</option>
<option value="9.1.0">9.1.0</option>
<option value="9.0.1">9.0.1</option>
<option value="9.0.0">9.0.0</option>
<option value="8.2.1">8.2.1</option>
</select>
</div>
<br>
<div>This page shows a list of the Coordinate Reference Systems included in <a href="https://proj.org">PROJ</a>.
<span id="version_link">(see generation <a id="metadata" href="./metadata.txt">metadata file</a>)</span>
<br>You can filter by type, authority, name and ___location (clicking on the map).
<br>Selecting the area of use of any CRS displays it as a rectangle in the map.
<br>Visit the source code in <a href="https://github.com/jjimenezshaw/crs-explorer">GitHub</a>.
</div>
<br>
<div id="mapcont"><div id="mapid"></div></div>
<div><label title="Keeps the map always visible"><input type="checkbox" id="stickyCb">Sticky map</label> |
Click the map to select a ___location. Drag the point for an area. <button type="button" id="delete">Delete ___location</button> <span id="___location"></span></div>
<div id="filters"> </div>
<div id="authorities"> </div>
<br>
<div id="searcher">
<form>Filter by name: <input type="text" name="value" tabindex="1">
<button type="submit">Search</button>
<a href="javascript:toggleInfo()" title="Show/hide info" target="_self"> < ℹ > </a>
<span id="activeSearch" class="hide"> Active filter: <span id="activeSearchTxt"></span></span>
<div class="hide" id="search_info">
<ul>
<li>Write many words to do an "and" search on the "Name" column</li>
<li>Use | (pipe) separator to do an "or" search</li>
<li>Enclose the terms in quotes (") to search them together</li>
<li>Add a dash (-) to exclude an expression</li>
<li>Search is case insensitive</li>
<li>Numbers only are considered also as ids, and searched as codes</li>
<li>examples: <br> <code>"sachusetts mainland" -(ftUS)</code> <br> <code>4326 | 32632 | CH1903 LV95</code></li>
</ul>
</div>
</form>
</div>
<div id="message" class="message-text hide"><br> >> Select CRS types to display, like Projected, Geographic 2D or Vertical << </div>
<div class="screen-msg"><br>Your window width is too small. Some columns were removed. Rotate you mobile or enlarge the window to see them all.</div>
<h3>Selected & Filtered Systems (<span class='loader-text'>Loading…</span><span class='counter-text'></span>)</h3>
<div id="tables"></div>
<br>
<div id="copyright">© <a href="https://github.com/jjimenezshaw/">Javier Jimenez Shaw</a> </div>
<script>
let map = L.map('mapid').setView([0, 0], 1);
let filters = {
latlng : null,
latlng2 : null,
searchText : '',
ignoreWorld : false,
allowDeprecated : false,
authorities : {},
activeTypes: {},
};
let alreadyLoadedSet = new Set();
let fullDB = null;
let divCircle = L.divIcon({ className: 'circle'})
let marker = L.marker([0,0], {icon: divCircle, draggable: true});
let marker2 = L.marker([0,0], {icon: divCircle, draggable: true}); // L.circleMarker([0,0], {radius:5, draggable: true});
let boundingBox = null;
let rectangles = {};
let hooverRect = null;
// to load older versions of PROJ
let versioned_url = '';
let versioned_tag = '';
let osm = L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
attribution: '© <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors',
maxZoom: 18,
}).addTo(map);
let osmde = L.tileLayer('https://tile.openstreetmap.de/{z}/{x}/{y}.png', {
attribution: '© <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors',
maxZoom: 18,
});
let carto = L.tileLayer('https://cartodb-basemaps-{s}.global.ssl.fastly.net/rastertiles/voyager/{z}/{x}/{y}.png', {
attribution: '© Carto, under CC BY 3.0. Data by OpenStreetMap, under ODbL.',
maxZoom: 18,
});
var baseMaps = {
"OSM": osm,
"OSM (de)": osmde,
"Carto (en)": carto
};
var layerControl = L.control.layers(baseMaps).addTo(map);
function querystringFromFilters() {
let dic = {}
if (filters.latlng) {
dic.latlng = filters.latlng.lat.toFixed(6) + ',' + filters.latlng.lng.toFixed(6);
}
if (filters.latlng2) {
dic.latlng += ',' + filters.latlng2.lat.toFixed(6) + ',' + filters.latlng2.lng.toFixed(6);
}
if (filters.searchText) dic.searchText = encodeURIComponent(filters.searchText);
dic.ignoreWorld = filters.ignoreWorld ? 'true' : 'false';
dic.allowDeprecated = filters.allowDeprecated ? 'true' : 'false';
dic.authorities = Object.keys(filters.authorities).filter(key => filters.authorities[key]).join(',');
dic.activeTypes = Object.keys(filters.activeTypes).filter(key => filters.activeTypes[key]).join(',');
dic.map = currentMapName();
if (versioned_tag) {
dic.v = versioned_tag;
}
let res = Object.keys(dic).map(key => key +'='+ dic[key]).join('&');
return res;
}
function currentMapName() {
if (map.hasLayer(osm))
return 'osm';
else if (map.hasLayer(osmde))
return 'osmde';
else if (map.hasLayer(carto))
return 'carto';
return '';
}
function updateMapFromParams(input) {
if (input.map == 'osm')
map.addLayer(osm);
else if (input.map == 'osmde')
map.addLayer(osmde);
else if (input.map == 'carto')
map.addLayer(carto);
else
map.addLayer(osm); // default map tiles
map.on('baselayerchange', updateURL);
}
function updateFiltersFromParams(input) {
let dic = {
latlng : '',
searchText : '',
ignoreWorld : 'false',
allowDeprecated : 'false',
authorities : 'EPSG',
activeTypes: '',
}; // defaults
if (input.all == 'true') {
dic.ignoreWorld = 'false';
dic.allowDeprecated = 'true';
dic.authorities = Object.keys(filters.authorities).join(',');
dic.activeTypes = Object.keys(filters.activeTypes).join(',');
}
Object.assign(dic, input);
function setCheck(id, group, checked) {
if (group && !(id in group)) return false;
let obj = document.getElementById(id);
if (!obj) return false;
if (checked) {
obj.setAttribute('checked', '');
} else {
obj.removeAttribute('checked');
}
return true;
}
try {
const latlng = dic.latlng.split(',');
if (latlng.length == 4) setLatlng(L.latLng(latlng.slice(0,2)), L.latLng(latlng.slice(2,4)));
else if (latlng.length >= 2) setLatlng(L.latLng(latlng.slice(0,2)));
} catch (ignore) {}
setSearchText(decodeURIComponent(dic.searchText))
dic.authorities.split(',').forEach(auth => {
if (setCheck(auth, filters.authorities, true)) filters.authorities[auth] = true;
});
dic.activeTypes.split(',').forEach(type => {
if (setCheck(type, filters.activeTypes, true)) filters.activeTypes[type] = true;
});
filters.ignoreWorld = dic.ignoreWorld == 'true';
setCheck('ignoreWorld', null, filters.ignoreWorld);
filters.allowDeprecated = dic.allowDeprecated == 'true';
setCheck('allowDeprecated', null, filters.allowDeprecated);
}
function setLatlng(latlng, latlng2 = null) {
function updateText() {
let ___location = 'Clicked ___location: ' + filters.latlng;
if (map.hasLayer(marker2)) ___location = 'Selected box: ' + filters.latlng + ', ' + filters.latlng2;
document.querySelector('#___location').innerHTML = ___location;
}
function fillLatLng2(latlng2) {
filters.latlng2 = latlng2;
if (latlng2) {
marker2.setLatLng(filters.latlng2).addTo(map);
boundingBox.setBounds(L.latLngBounds(filters.latlng, filters.latlng2)).addTo(map);
}
}
if (!boundingBox) boundingBox = L.rectangle(L.latLngBounds(latlng, latlng));
boundingBox.removeFrom(map);
marker2.removeFrom(map);
filters.latlng = latlng;
fillLatLng2(latlng2)
marker.on('dragstart', function(ev) {
if (!map.hasLayer(marker2)) {
fillLatLng2(filters.latlng)
}
});
marker.on('drag', function(ev) {
filters.latlng = ev.latlng
boundingBox.setBounds(L.latLngBounds(filters.latlng, filters.latlng2))
});
marker2.on('drag', function(ev) {
filters.latlng2 = ev.latlng
boundingBox.setBounds(L.latLngBounds(filters.latlng, filters.latlng2))
});
marker.on('dragend', function(ev) {
updateText();
runFilter();
})
marker2.on('dragend', function(ev) {
updateText();
runFilter();
})
marker.setLatLng(filters.latlng).addTo(map);
updateText();
}
map.on('click', function(e) {
setLatlng(e.latlng)
runFilter();
});
document.querySelector('#delete').addEventListener('click', function () {
if (filters.latlng) {
filters.latlng = null;
filters.latlng2 = null;
marker && marker.removeFrom(map);
marker2 && marker2.removeFrom(map);
boundingBox && boundingBox.removeFrom(map);
document.querySelector('#___location').innerHTML = '';
runFilter();
}
});
document.querySelector('#stickyCb').addEventListener('click', function (ev) {
document.querySelector('#mapcont').classList[ev.target.checked ? 'add' : 'remove']('sticky');
});
function makeRectangle (area_of_use, color) {
let bounds = null;
let off0 = 0, off2 = 0;
if (area_of_use[0] < area_of_use[2]) {
} else if (Math.abs(area_of_use[0]) < Math.abs(area_of_use[2])) {
off2 = 360
} else {
off0 = 360
}
bounds = [[area_of_use[1], area_of_use[0]-off0], [area_of_use[3], area_of_use[2]+off2]];
return L.rectangle(bounds, {color: color});
}
function clickArea(ev, code, area_of_use) {
if (!(code in rectangles)) {
rectangles[code] = {layer : makeRectangle(area_of_use, 'green')};
}
rectangles[code].layer[ev.target.checked ? 'addTo' : 'removeFrom'](map);
}
function mouseOnArea(ev, code, area_of_use, enter) {
if (hooverRect) {
hooverRect.removeFrom(map);
hooverRect = null;
}
if (enter) {
hooverRect = makeRectangle(area_of_use, 'coral');
hooverRect.addTo(map);
}
}
let tabs = [
{ id:'PROJECTED_CRS', str:'Projected'},
{ id:'GEOGRAPHIC_2D_CRS', str:'Geographic 2D'},
{ id:'GEOGRAPHIC_3D_CRS' , str:'Geographic 3D'},
{ id:'GEOCENTRIC_CRS', str:'Geocentric' },
{ id:'GEODETIC_CRS', str:'Geodetic' },
{ id:'VERTICAL_CRS', str:'Vertical' },
{ id:'COMPOUND_CRS', str:'Compound'},
{ id:'CRS', str:'Other' },
];
let form = document.querySelector("form");
form.addEventListener("submit", function(event) {
event.preventDefault();
let str = form.elements.value.value;
setSearchText(str)
runFilter();
});
function setSearchText(str) {
form.elements.value.value = str;
str = str.trim();
filters.searchText = str;
if (str) {
document.querySelector('#activeSearch').classList.remove('hide');
document.querySelector('#activeSearchTxt').innerText = str;
} else {
document.querySelector('#activeSearch').classList.add('hide');
}
}
function toggleInfo() {
document.querySelector("#search_info").classList.toggle('hide');
}
function createTables() {
tabs.forEach(tab => filters.activeTypes[tab.id] = false);
let tabdiv = document.querySelector(`#tables`);
let tb = document.createElement('table');
tabdiv.appendChild(tb);
const ascCaret = '▲';
const desCaret = '▼';
let header = tb.createTHead();
let row = header.insertRow();
let order = '<span class="order"></span>';
['Code', 'Name', 'Area of Use', 'Type', 'WKT', 'Deprecated'].forEach(e => row.appendChild(document.createElement('th')).innerHTML = e + order);
let tblBody = document.createElement('tbody');
tb.appendChild(tblBody);
row.querySelector('th').asc = true;
row.querySelector('.order').innerHTML = ascCaret;
Array.from(tb.querySelectorAll('th')).forEach(th => th.addEventListener('click', (() => slowTask(() => {
Array.from(header.querySelectorAll('.order')).forEach(o => o.innerHTML = '');
th.asc = !th.asc;
sortOnTh(th);
th.querySelector('.order').innerHTML = th.asc ? ascCaret : desCaret;
}))));
}
function sortOnTh(th) {
const getCellValue = (tr, idx) => {
let str = tr.children[idx].innerText || tr.children[idx].textContent ;
if (idx == 0) {
let v = str.split(':');
str = v[0] + v[1].padStart(7,'0');
}
return str;
};
const comparer = (idx, asc) => (a, b) => ((v1, v2) =>
v1 !== '' && v2 !== '' && !isNaN(v1) && !isNaN(v2) ? v1 - v2 : v1.toString().localeCompare(v2)
)(getCellValue(asc ? a : b, idx), getCellValue(asc ? b : a, idx));
const tb = document.querySelector(`#tables > table`)
const tblBody = tb.querySelector('tbody');
if (!th) {
th = Array.from(tb.querySelectorAll('thead .order')).find(el => el.innerHTML != "").parentNode;
}
const idx = Array.from(th.parentNode.children).indexOf(th)
Array.from(tblBody.querySelectorAll('tr'))
.sort(comparer(idx, th.asc))
.forEach(tr => tblBody.appendChild(tr) );
colorBackground();
}
function createCheckboxes() {
let div = document.querySelector('#filters');
div.innerHTML = '';
tabs.forEach(tab => {
let el = document.createElement('label');
el.innerHTML = `<input type="checkbox" class="crstype" id="${tab.id}">${tab.str}`;
div.appendChild(el);
el.querySelector(`input`).addEventListener('click', function (ev) {
filters.activeTypes[tab.id] = ev.target.checked;
runFilter();
});
div.appendChild(document.createTextNode(' ')); // otherwise Firefox does not break between labels
});
div.appendChild(document.createTextNode(' | '));
let el = document.createElement('label');
div.appendChild(el).innerHTML = `<input type="checkbox" id="ignoreWorld">Ignore World`;
el.title = "Do not show CRS with area of use longitude from -180 to 180";
el.querySelector('input').addEventListener('change', function (ev) {
filters.ignoreWorld = ev.target.checked;
runFilter();
});
div.appendChild(document.createTextNode(' '));
el = document.createElement('label');
div.appendChild(el).innerHTML = `<input type="checkbox" id="allowDeprecated">Allow deprecated`;
el.title = "Display also deprecated systems";
el.querySelector('input').addEventListener('click', function (ev) {
filters.allowDeprecated = ev.target.checked;
runFilter();
});
}
function createAuthorities(db) {
let auths = []
db.forEach(crs => {
if (!auths.includes(crs.auth_name)) {
auths.push(crs.auth_name);
}
});
let div = document.querySelector('#authorities');
div.innerHTML = '';
auths.forEach(auth => {
let el = document.createElement('label');
el.innerHTML = `<input type="checkbox" id="${auth}"}>${auth}`;
div.appendChild(el);
filters.authorities[auth] = false;
document.querySelector(`#${auth}`).addEventListener('change', function (ev) {
filters.authorities[auth] = ev.target.checked;
runFilter();
});
div.appendChild(document.createTextNode(' '));
});
}
function slowTask(cb) {
document.querySelector('.loader-text').classList.remove('hide');
document.querySelector('.counter-text').classList.add('hide');
setTimeout(function() {
cb();
document.querySelector('.loader-text').classList.add('hide');
document.querySelector('.counter-text').classList.remove('hide');
}, 0);
}
let runCounter = 0;
function updateURL() {
let url = new URL(___location);
url.search = querystringFromFilters();
if (runCounter == 0) {
} else if (runCounter == 1) {
window.history.___pushState(null, '', url.toString());
} else {
window.history.___replaceState(null, '', url.toString());
}
runCounter++;
}
function runFilter() {
updateURL();
slowTask(runFilterCb);
}
function intersects(box1, box2) {
if (box1.n < box2.s || box2.n < box1.s) {
return false;
}
if (box1.w <= box1.e && box2.w <= box2.e) {
// none crosses the antimeridian
return Math.max(box1.w, box2.w) <= Math.min(box1.e, box2.e);
} else if (box1.w > box1.e && box2.w > box2.e) {
// both cross the antimeridian
return true;
} else {
// one crosses the antimeridian
return box2.w <= box1.e || box1.w <= box2.e;
}
}
function normalizeLong(lng) {
while(lng < -180) {
lng += 360;
}
while (lng > 180) {
lng -= 360;
}
return lng;
}
function runFilterCb() {
fillTables();
// Show message to select a type if none is selected.
let message = document.querySelector('#message');
if (Object.keys(filters.activeTypes).find(t => filters.activeTypes[t])) {
message.classList.add('hide');
} else {
message.classList.remove('hide');
}
let byCode = [];
if (filters.searchText) {
Array.from(document.querySelectorAll(`tbody > tr`)).forEach(r => r.classList.add('hide'));
// first split in blocks divided by or |
const ors = filters.searchText.match(/([^\|]+)/g);
ors.forEach(or => {
let selector = '';
const number = or.match(/^\s*([1-9]\d*)\s*$/);
if (number && number.length == 2) {
selector = `tbody > tr[data-id$=":${number[1]}"] , `;
byCode = byCode.concat(fullDB.filter(crs => crs.code === number[1]));
}
const strs = or.match(/(-?".*?"|[^"\s]+)(?=\s*|\s*$)/g);
const selectorsArray = strs.map(x => {
if (x.charAt(0) == '-') {
x = x.replaceAll('"', '');
return `:not([data-crs-name*="${x.substring(1)}" i])`;
} else {
x = x.replaceAll('"', '');
return `[data-crs-name*="${x}" i]`;
}
});
selector += `tbody > tr${selectorsArray.join('')}`;
Array.from(document.querySelectorAll(selector)).forEach(r => r.classList.remove('hide'));
})
} else {
Array.from(document.querySelectorAll(`tbody > tr`)).forEach(r => r.classList.remove('hide'));
}
let selectorsArray = [];
if (filters.ignoreWorld) selectorsArray.push('[data-world="true"]');
if (!filters.allowDeprecated) selectorsArray.push('[data-deprecated="true"]');
Object.keys(filters.authorities).forEach(auth => {
if (!filters.authorities[auth]) {
selectorsArray.push(`[data-auth="${auth}"]`);
}
});
Object.keys(filters.activeTypes).forEach(t => {
if (!filters.activeTypes[t]) {
selectorsArray.push(`[data-type="${t}"]`);
}
});
if (selectorsArray.length > 0) {
const selector = selectorsArray.map(e => `tbody > tr${e}`).join(' , ');
Array.from(document.querySelectorAll(selector)).forEach(r => r.classList.add('hide'));
}
const latlng = filters.latlng;
const latlng2 = filters.latlng2;
if (latlng){
let w = latlng.lng;
let e = w;
let n = latlng.lat;
let s = n;
if (latlng2) {
w = Math.min(w, latlng2.lng);
e = Math.max(e, latlng2.lng);
n = Math.max(n, latlng2.lat);
s = Math.min(s, latlng2.lat);
}
if (e-w >= 360) {
w = -180;
e = 180;
} else {
w = normalizeLong(w);
e = normalizeLong(e);
}
const box1 = {w:w, s:s, e:e, n:n};
Array.from(document.querySelectorAll(`tbody > tr:not(.hide)`)).forEach(r => {
const box2 = {w:r.area_of_use[0], s:r.area_of_use[1], e:r.area_of_use[2], n:r.area_of_use[3]};
const use = intersects(box1, box2);
if (!use) r.classList.add('hide');
});
}
document.querySelector('#activeSearchTxt').innerText = filters.searchText;
colorBackground();
countElements();
byCode.forEach(crs =>{
let code = crs.auth_name + ":" + crs.code;
selector = `tbody > tr[data-id="${code}"]:not(.hide)`;
if (!document.querySelector(selector)) {
let reasons = [];
if (!filters.authorities[crs.auth_name]) {
reasons.push(crs.auth_name);
}
if (!filters.activeTypes[crs.type]) {
reasons.push(`${tabs.find(tab => tab.id == crs.type).str}`);
}
if (!filters.allowDeprecated && crs.deprecated) {
reasons.push('deprecated');
}
if (filters.ignoreWorld && crs.area_of_use[0] == -180 && crs.area_of_use[2] == 180) {
reasons.push('world-area-of-use');
}
if (reasons.length == 0) {
// filter by coordinates?
let areaName = crs.area_of_use[4];
if (areaName.length > 32) {
areaName = areaName.slice(0,32) + " …";
}
reasons.push(areaName);
}
let activeSearch = document.querySelector('#activeSearchTxt');
activeSearch.innerHTML += `<br> > <b>${code}</b> (${reasons.join(', ')}) is not displayed. Set filters properly.`;
}
})
}
function colorBackground() {
Array.from(document.querySelectorAll(`tbody`)).forEach(tbody => {
let counter = 0;
Array.from(tbody.querySelectorAll(`tr:not(.hide)`)).forEach(r => {
counter += 1;
r.classList[counter % 2 ? 'remove' : 'add']('odd');
})
});
}
function countElements() {
const c = document.querySelectorAll(`#tables tbody tr:not(.hide)`).length;
document.querySelector('.counter-text').innerHTML = c;
}
function fillWktsField(wkts, crs) {
['1', '2'].forEach(n => {
const filename = `${versioned_url}./wkt${n}/${crs.auth_name}/${crs.code}.txt`;
let a = document.createElement('a');
a.setAttribute('href', filename);
a.innerText = `[${n}]`;
a.classList.add(`wkt${n}`);
let timeoutId = null
a.addEventListener('mouseenter', e => {
if (a.getAttribute('title')) return;
timeoutId = setTimeout(() => {
timeoutId = null;
fetch(filename, { method: "GET" })
.then(response => response.text())
.then(text => {
text = text.replaceAll("'", "\'");
a.setAttribute('title', text);
});
}, 300);
});
a.addEventListener('mouseleave', e => {
clearTimeout(timeoutId);
timeoutId = null;
});
wkts.appendChild(a);
});
wkts.classList.add('wkts_cell');
let a = document.createElement('span')
const sr = 'https://spatialreference.org';
const auth_lower = crs.auth_name.toLowerCase();
a.innerHTML = ` <a href="${sr}/ref/${auth_lower}/${crs.code}/" ` +
` title="Open ${crs.auth_name}:${crs.code} in spatialreference.org">` +
`<img class="sr-icon" src="${sr}/favicon.ico" width="16"></a>`;
wkts.appendChild(a);
}
function fillTables(db) {
function hashAlreadyLoaded(auth, type) {
return auth + ":" + type;
}
if (!db) {
db = fullDB;
}
const activeAuthorities = Object.keys(filters.authorities).filter(key => filters.authorities[key]);
const activeTypes = Object.keys(filters.activeTypes).filter(key => filters.activeTypes[key]);
let allDone = true;
const selectedSet = new Set();
activeAuthorities.forEach(auth => {
activeTypes.forEach(type => {
const hash = hashAlreadyLoaded(auth, type);
selectedSet.add(hash)
if (!alreadyLoadedSet.has(hash)) {
allDone = false;
}
})
})
if (allDone) return;
tabmap = {};
tabs.forEach(tab => tabmap[tab.id] = tab.str);
let table = document.querySelector('#tables table > tbody');
db.filter (crs => {
const hash = hashAlreadyLoaded(crs.auth_name, crs.type);
return !alreadyLoadedSet.has(hash) && selectedSet.has(hash);
}).forEach (crs => {
let code = crs.auth_name + ":" + crs.code;
let row = table.insertRow();
row.classList.add('hide')
row.setAttribute('data-crs-name', crs.name);
row.setAttribute('data-type', crs.type);
row.setAttribute('data-id', code);
row.setAttribute('data-auth', crs.auth_name);
row.setAttribute('data-deprecated', crs.deprecated);
row.setAttribute('data-world', crs.area_of_use[0] == -180 && crs.area_of_use[2] == 180);
row.area_of_use = crs.area_of_use.slice(0, 4);
let linkedCode = code;
if (crs.auth_name == "EPSG") {
const scapedName = crs.name.replace(/[^0-9a-zA-Z]+/g, '-');
linkedCode = `<a href="https://epsg.org/crs_${crs.code}/${scapedName}.html">${code}</a>`;
}
row.insertCell().innerHTML = linkedCode;
row.insertCell().innerHTML = crs.name;
let area = row.insertCell();
area.innerHTML = `<label><input type="checkbox"> ${crs.area_of_use[4]}</label>`;
area.querySelector(`input`).addEventListener('click', function (ev) {clickArea(ev, code, crs.area_of_use)});
area.title = crs.area_of_use[4];
area.classList.add('area');
area.addEventListener('mouseenter', ev => mouseOnArea(ev, code, crs.area_of_use, true));
area.addEventListener('mouseleave', ev => mouseOnArea(ev, code, crs.area_of_use, false));
row.insertCell().innerHTML = tabmap[crs.type];
let wkts = row.insertCell();
fillWktsField(wkts, crs);
row.insertCell().innerHTML = crs.deprecated;
});
selectedSet.forEach(elem => alreadyLoadedSet.add(elem));
sortOnTh();
}
function paramsToDic(___location) {
const url = new URL(___location);
let dic = {};
for (let k of url.searchParams.keys()) {
dic[k] = url.searchParams.get(k);
}
return dic;
}
function updateFromParams(___location) {
const dic = paramsToDic(___location);
updateMapFromParams(dic);
updateFiltersFromParams(dic);
}
function versionChanged(that) {
const v = that.value;
if (v && v != 'latest') {
versioned_tag = v;
} else {
versioned_tag = '';
}
updateURL();
window.___location.reload();
}
function processVersionFromParams(___location) {
const dic = paramsToDic(___location);
const v = dic['v'];
if (v && v != 'latest') {
var sel = document.getElementById("version");
if (!Array.from(sel.options).find(o => o.value == v)) {
window.alert(`Invalid version tag [${v}]. Latest will be used.`);
return;
}
versioned_tag = v;
versioned_url = `https://raw.githubusercontent.com/OSGeo/PROJ-CRS-Explorer/${v}/`;
document.getElementById("proj_version").innerText = versioned_tag + '*';
document.getElementById("metadata").href = versioned_url + 'metadata.txt';
sel.value = versioned_tag;
}
}
function loadDb() {
processVersionFromParams(window.___location)
const url = versioned_url + 'crslist.json';
fetch(url, {
method: "GET",
})
.then(response => {
if (!response.ok) {
const message = "Something went wrong downloading " + url
alert(message);
updateURL();
throw new Error(message);
}
return response.json();
})
.then(data => {
fullDB = data;
createAuthorities(data);
updateFromParams(window.___location);
fillTables(data);
runFilter();
})
.catch((error) => {
console.log(error)
});
}
function load() {
setTimeout(function() {
createCheckboxes();
createTables();
loadDb();
}, 1);
}
</script>
</body>
</html>