Created
June 26, 2026 20:16
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css" /> | |
| <script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js"></script> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/openlocationcode/1.0.4/openlocationcode.min.js"></script> | |
| <style> | |
| #map { | |
| height: 100vh; | |
| width: 100%; | |
| margin: 0; | |
| } | |
| body { | |
| margin: 0; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="map"></div> | |
| <script> | |
| const map = L.map("map"); | |
| L.tileLayer("https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png").addTo(map); | |
| function drawPlusCodeGrid(lat, lng) { | |
| map.eachLayer(layer => { | |
| if (layer instanceof L.Marker || layer instanceof L.Rectangle) { | |
| map.removeLayer(layer); | |
| } | |
| }); | |
| map.setView([lat, lng], 16); | |
| const userExactCode = OpenLocationCode.encode(lat, lng, 10); | |
| const userAreaCode8 = OpenLocationCode.encode(lat, lng, 8); | |
| const marker = L.marker([lat, lng]).addTo(map); | |
| marker.bindTooltip(userExactCode, { permanent: true, direction: "top", offset: [0, -10] }); | |
| const centerInfo = OpenLocationCode.decode(userAreaCode8); | |
| const centerLat = (centerInfo.latitudeLo + centerInfo.latitudeHi) / 2; | |
| const centerLng = (centerInfo.longitudeLo + centerInfo.longitudeHi) / 2; | |
| const step = centerInfo.latitudeHi - centerInfo.latitudeLo; | |
| for (let dLat = 1; dLat >= -1; dLat--) { | |
| for (let dLng = -1; dLng <= 1; dLng++) { | |
| const nLat = centerLat + (dLat * step); | |
| const nLng = centerLng + (dLng * step); | |
| const neighborCode8 = OpenLocationCode.encode(nLat, nLng, 8); | |
| const half = step / 2; | |
| const nBounds = { southWest: [nLat - half, nLng - half], northEast: [nLat + half, nLng + half] }; | |
| L.rectangle([nBounds.southWest, nBounds.northEast], { weight: 2, fillColor: "#0066cc", fillOpacity: 0.1 }) | |
| .addTo(map) | |
| .bindTooltip(neighborCode8, { permanent: true, direction: "center" }); | |
| } | |
| } | |
| } | |
| map.on('locationfound', (e) => drawPlusCodeGrid(e.latlng.lat, e.latlng.lng)); | |
| map.locate({ setView: true, maxZoom: 16, enableHighAccuracy: true, timeout: 5000 }); | |
| </script> | |
| </body> | |
| </html> |
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