MR_DESCRIPTION.md

Merge Request / Pull Request Description: Phase 2 - Functional + POI Integration (dev_skeleton_and_features)

📝 Overview

This Merge Request delivers Phase 2: Functional + POI Integration for the Trailhead project. It introduces live and offline Points of Interest (POI) extraction via OpenStreetMap (Overpass API), integrates a local Wilderness First-Aid medical manual RAG search, and implements a full route simulation player with metrics HUD, proximity alert indicators, and smooth Leaflet map marker rendering.

🚀 Key Changes

1. POI Integration (gpx_parser.py):
   • Fetches key POIs (drinking water, spring, huts, shelters, campsites, viewpoint, peak, emergency phone) dynamically within a custom bounding box of the track via the OSM Overpass API.
   • Filters amenities locally using the Haversine formula within a 150m buffer of the route.
   • Serializes/saves POIs into GPX XML <extensions> and <wpt> tags via save_enhanced_gpx for offline capabilities.
2. Wilderness First-Aid Guide (first_aid_guide.json & rag.py):
   • Created a wilderness medical corpus covering 5 key sections (bleeding, hypothermia, heat, altitude sickness, musculoskeletal).
   • Implemented keyword intersection matching in rag.py to ground first-aid queries, returning relevant guide text along with section citations.
3. Simulation HUD & Playback UI (app.py):
   • Added simulation controls (Play, Pause, Speed slider, Reset).
   • Displays dashboard metrics (Route progress %, distance walked, altitude, and dynamic ETA to next checkpoint).
   • Sounds/shows offline proximity alerts when within 150m of any drinking water, camp, or hut.
   • Integrated Wilderness First-Aid tab with static emergency cards and RAG manual search.
4. Flicker-Free Map Rendering (Leaflet):
   • Embedded Leaflet map container directly in the parent window.
   • Wired data exchange using JSON state strings via a hidden Gradio textbox, completely eliminating iframe reload flickering during simulation updates.
   • Rendered POIs with distinct colored circle markers (Blue for water, Green for huts, Orange for camps, Purple for peaks, Red for phone) for offline compatibility.

🛠️ Verification Done

• Created test_overpass.py to parse the preloaded Trento Track.
• Verified Overpass API (https://overpass-api.de/api/interpreter) fetched, filtered, and returned amenities successfully within a 150m buffer.
• Validated that the first-aid RAG keyword search retrieves correct sections and references them.
• Tested the simulation playback, ensuring coordinates update smoothly and map centers without flickering.

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📋 Steps to Push to GitHub

# Push the current branch to GitHub
git push -u origin dev_skeleton_and_features