📍 Location-Based Attendance Verification (Streamlit + GPS + Microsoft Forms)
This project provides a location-restricted attendance system built with Streamlit.
Users must be physically present near the seminar/classroom to access the attendance form. If they are inside the allowed GPS radius, they are automatically redirected to a Microsoft Form. Otherwise, access is denied.
🚀 Live App
👉 Open here: https://attendance-8avu5rhldpsugjrcgvx7qj.streamlit.app/
✅ How It Works
User opens the Streamlit page
Browser requests GPS permission
Distance is calculated using Haversine formula
If inside allowed radius → redirect to Microsoft Form
If outside → access denied
🔒 Logic IF distance ≤ allowedRadius: redirect to MS Form ELSE: block access
✨ Features
✅ Automatic GPS verification ✅ Distance calculation (meters) ✅ Microsoft Forms redirect ✅ No form shown before verification ✅ Works on mobile & desktop ✅ Simple, lightweight ✅ Easy deployment on Streamlit Cloud
📍 Configuration
Inside app.py you can change:
Target location const targetLat = 39.132473; const targetLng = -84.5170492;
Radius (meters) const allowedRadius = 90;