<!DOCTYPE html>
<html lang="ja">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>GNSS Logger with Polyline</title>
<link rel="stylesheet" href="leaflet.css" />
<style>
#map {
height: 600px;
width: 100%;
}
#controls {
margin-bottom: 10px;
}
#distance {
margin-top: 10px;
font-size: 20px;
}
</style>
</head>
<body>
<div id="controls">
<button id="startButton">START</button>
<button id="stopButton">STOP</button>
</div>
<div id="distance">距離: 0 m</div>
<div id="map"></div>
<script src="leaflet.js"></script>
<script>
let map = L.map('map').setView([35.6762, 139.6503], 13);
L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
maxZoom: 19,
attribution: '© OpenStreetMap'
}).addTo(map);
let polyline = L.polyline([], { color: 'blue', weight: 3 }).addTo(map);
let logging = false;
let logInterval;
let totalDistance = 0;
document.getElementById('startButton').onclick = function() {
if (!logging) {
logging = true;
logPosition();
logInterval = setInterval(logPosition, 10000);
}
};
document.getElementById('stopButton').onclick = function() {
if (logging) {
logging = false;
clearInterval(logInterval);
}
};
function logPosition() {
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position) {
const lat = position.coords.latitude;
const lng = position.coords.longitude;
polyline.addLatLng([lat, lng]);
map.setView([lat, lng], 13);
if (polyline.getLatLngs().length > 1) {
const latlngs = polyline.getLatLngs();
const lastPoint = latlngs[latlngs.length - 2];
const newPoint = latlngs[latlngs.length - 1];
const distance = lastPoint.distanceTo(newPoint);
totalDistance += distance;
document.getElementById('distance').innerText = `距離: ${totalDistance.toFixed(2)} m`;
}
}, function(error) {
console.error("Geolocation error: " + error.message);
});
} else {
alert("このブラウザではGeolocationがサポートされていません。");
}
}
</script>
</body>
</html>
