OpenStreetMap Marker

Generates a self-contained, browser-previewable custom marker map HTML page styled after Amap's mobile app (light minimal basemap + circular colored icon + text label + immersive full-screen layout with safe-area support).

Core Workflow

1. Get marker coordinates: prefer apple-maps search --query "place name city" --lat <city lat> --lon <city lng> --limit 1 -q --compact, which returns JSON with lat/lon/coordinate_system.
2. Coordinate conversion (critical, do not skip): Apple Maps / Amap / Tencent / Baidu almost always return GCJ-02 coordinates in mainland China, while this skill's Leaflet+OSM/CartoDB basemap uses WGS-84. Using GCJ-02 directly causes markers to drift tens to hundreds of meters (often landing in a river or the sea). Coordinates within mainland China MUST be converted with scripts/gcj_convert.py before writing to landmarks.json; the script automatically skips conversion for points outside China (out_of_china check).

   python3 /var/minis/skills/openstreetmap-marker/scripts/gcj_convert.py <lng> <lat>
   # outputs "wgs_lat,wgs_lng"

3. Assemble landmarks.json: an array where each item is:

   {"name": "West Lake", "desc": "UNESCO World Heritage Site, Hangzhou's iconic landmark", "address": "Xihu District, Hangzhou", "lat": 30.2614, "lng": 120.1443, "type": "green", "icon": "fa-tree"}

   • name/lat/lng are required; desc/address/type/icon are optional.
   • type determines the marker dot color: red (government/medical/core attraction), green (park/nature), blue (transport/building), purple (commercial/venue), brown (heritage/university), or orange (other). Defaults to blue. Each type also has a sensible default Font Awesome icon (red→fa-star, green→fa-tree, blue→fa-building, purple→fa-bag-shopping, brown→fa-landmark, orange→fa-circle-dot). Leave icon empty to use it.
   • icon (optional): a Font Awesome 6 solid-style icon class name, e.g. "fa-train", "fa-utensils", "fa-mosque", "fa-museum", "fa-mountain". Overrides the type default. Look up icon names at fontawesome.com/icons (free "solid" set). Do NOT use emoji; all icons are unified Font Awesome glyphs rendered via <i class="fa-solid ..."> for a consistent cross-device look.
   • Write this JSON array to a temp file with file_write, e.g. /tmp/landmarks.json.
4. Generate the page:

   python3 /var/minis/skills/openstreetmap-marker/scripts/build_map.py \
     /tmp/landmarks.json /var/minis/workspace/<descriptive-filename>.html \
     --title "West Lake Area Landmarks" --header "⚡ Hangzhou Trip" \
     --style light

   • --style light (default, light minimal, Amap-like palette) or --style dark (dark immersive).
   • Without --center/--zoom, the script automatically centers and zooms to fit all points with padding; a single point defaults to zoom 14.
5. Deliver: present the result to the user as a Markdown link [Preview](minis://workspace/<filename>.html), tappable to open in the built-in browser.

Built-in style features (already handled by the template, no need to re-explain)

• Full-screen immersive: viewport-fit=cover + env(safe-area-inset-*) for notch/Dynamic Island devices.
• Semi-transparent top status bar (live clock on the left, custom header text on the right).
• No bottom search bar / tab bar / side floating buttons (kept minimal per user preference: just map + markers).
• Markers are circular colored icons (Font Awesome, loaded via CDN cdnjs.cloudflare.com/.../font-awesome/...) + white text label pills for a unified, non-emoji icon style.
• Leaflet zoom control hidden by default (zoomControl: false) for a clean UI.
• Tapping a marker opens a Google Maps-style bottom info card (not Leaflet's default popup) showing: title (with FA icon), address (if provided, 📍-style row), coordinates (lat, lng), and desc as a note below a divider. No ratings/route/save/share buttons; kept intentionally minimal. A close (✕) button and tapping the basemap both dismiss it.
• The info card has a single "Open Location in..." button, which slides up a bottom action sheet listing available map apps vertically (Amap / Google Maps / Apple Maps), each with an FA icon; a "Cancel" row closes the sheet. Available options are platform-aware:
  • Amap (labeled "Amap" in the sheet UI): only shown if the point falls within mainland China (coarse lat/lng range check). landmarks.json stores WGS-84; the frontend JS automatically converts WGS-84→GCJ-02 before building the Amap deep link.
  • Google Maps: always shown.
  • Apple Maps: only shown on iOS (UA-detected); hidden on Android since it is not a relevant or installable app there.
  • Platform is detected via navigator.userAgent (isAndroid / isIOS). Each option first tries a native URL scheme / intent to directly launch the installed app even from inside an embedded WebView; plain https:// links alone do NOT auto-launch native apps in an embedded webview (only a full browser like Safari/Chrome does that reliably). A short setTimeout fallback then redirects to the equivalent https:// web link if the scheme silently fails (app not installed):
    • Amap: iosamap:// (iOS) / amapuri:// (Android) → fallback https://uri.amap.com/marker?...
    • Google Maps: comgooglemaps:// (iOS) / geo:lat,lng?q=... (Android) → fallback https://www.google.com/maps/search/?api=1&query=...
    • Apple Maps: maps:// → fallback https://maps.apple.com/?ll=...

Tile provider note

Uses CARTO's free Voyager/Dark basemap tiles (no API key required). Fine for personal/demo use, but subject to CARTO's rate limits and non-commercial-scale terms. For high-traffic production use, switch TILE_STYLES in scripts/build_map.py to a licensed provider (Mapbox, Stadia Maps, etc.).

Common adjustments

• Change basemap: edit TILE_STYLES in scripts/build_map.py and add a new key, e.g. Esri World Imagery tile URL for satellite view.
• Add routes/tracks: append L.polyline([[lat,lng],...]).addTo(map) to the generated HTML; these coordinates also need GCJ-02→WGS-84 conversion first if in mainland China.
• Multi-day itineraries: generate one HTML per day, or use different type colors to distinguish Day1/Day2/Day3.

Reference files

• scripts/gcj_convert.py - GCJ-02→WGS-84 coordinate conversion (single-point CLI and batch JSON mode)
• scripts/build_map.py - map HTML generator
• assets/template.html - page template with placeholders __PAGE_TITLE__ __HEADER_TEXT__ __LANDMARKS_JSON__ __CENTER_LAT__ __CENTER_LNG__ __ZOOM__ __TILE_URL__