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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Calimoto GPX to Google Maps - Smart Routing</title>
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css"/>
<style>
body {
font-family: Arial, sans-serif;
margin: 1em;
}
label, select, input[type="file"] {
margin-bottom: 1em;
display: block;
width: 100%;
font-size: 1rem;
padding: 10px;
}
#map {
width: 100%;
height: 40vh;
margin-top: 1em;
border: 1px solid #ccc;
}
a {
word-break: break-word;
color: #007BFF;
text-decoration: none;
}
a:hover {
text-decoration: underline;
}
</style>
</head>
<body>
<h1>Calimoto GPX to Google Maps Directions</h1>
<div class="container">
<label for="gpxfile">Upload GPX File:</label>
<input type="file" id="gpxfile" accept=".gpx"/>
<div id="result"></div>
<div id="map"></div>
</div>
<script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js"></script>
<script>
let map = L.map('map').setView([46.962153, 7.446944], 13);
L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
attribution: '© OpenStreetMap contributors'
}).addTo(map);
let routeLine;
function getDistance(lat1, lon1, lat2, lon2) {
const toRad = deg => deg * Math.PI / 180;
const R = 6371e3; // meters
const dLat = toRad(lat2 - lat1);
const dLon = toRad(lon2 - lon1);
const a = Math.sin(dLat/2)**2 +
Math.cos(toRad(lat1)) * Math.cos(toRad(lat2)) *
Math.sin(dLon/2)**2;
const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
return R * c;
}
function downsampleWaypoints(coords, max = 21) {
if (coords.length <= max) return coords;
const interval = coords.length / max;
const result = [];
for (let i = 0; i < max; i++) {
const index = Math.round(i * interval);
if (index < coords.length) result.push(coords[index]);
}
return result;
}
document.getElementById('gpxfile').addEventListener('change', function (event) {
const file = event.target.files[0];
if (!file) return;
const reader = new FileReader();
reader.onload = function (e) {
const parser = new DOMParser();
const xmlDoc = parser.parseFromString(e.target.result, "application/xml");
const routePoints = xmlDoc.getElementsByTagName('rtept');
if (routePoints.length < 3) {
document.getElementById('result').innerHTML = "Not enough <rtept> points.";
return;
}
const coords = [];
for (let i = 0; i < routePoints.length; i++) {
const lat = routePoints[i].getAttribute('lat');
const lon = routePoints[i].getAttribute('lon');
coords.push(lat + "," + lon);
}
const endCoord = coords[coords.length - 1];
navigator.geolocation.getCurrentPosition(function (position) {
const userLat = position.coords.latitude;
const userLon = position.coords.longitude;
let closestIndex = 0;
let minDist = Infinity;
for (let i = 0; i < coords.length; i++) {
const [lat, lon] = coords[i].split(',').map(Number);
const dist = getDistance(userLat, userLon, lat, lon);
if (dist < minDist) {
minDist = dist;
closestIndex = i;
}
}
// After finding closestIndex
const lookahead = 10;
let forwardIndex = closestIndex;
for (let i = closestIndex + 1; i < Math.min(closestIndex + lookahead, coords.length); i++) {
const [lat, lon] = coords[i].split(',').map(Number);
const dist = getDistance(userLat, userLon, lat, lon);
// Prefer slightly farther point if it's still reasonably close and farther along
if (dist < minDist * 1.5) {
forwardIndex = i;
minDist = dist;
}
}
const remainingCoords = coords.slice(forwardIndex);
const selectedCoords = downsampleWaypoints(remainingCoords);
const startCoord = "Current+Location";
const leafletStartCoord = `${userLat},${userLon}`;
const fullCoords = [startCoord, ...selectedCoords, endCoord];
const baseUrl = "https://www.google.com/maps/dir/";
const url = baseUrl + fullCoords.join('/');
document.getElementById('result').innerHTML = `
<p><strong>Directions Link:</strong></p>
<p><a href="${url}" target="_blank">${url}</a></p>
`;
// Draw preview
const latLngs = [leafletStartCoord, ...selectedCoords, endCoord].map(pt => {
const [lat, lon] = pt.split(',').map(Number);
return [lat, lon];
});
if (routeLine) map.removeLayer(routeLine);
routeLine = L.polyline(latLngs, {color: 'blue', weight: 4}).addTo(map);
map.fitBounds(routeLine.getBounds());
}, function (error) {
document.getElementById('result').innerHTML = "Error fetching location: " + error.message;
});
};
reader.readAsText(file);
});
</script>
</body>
</html>
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