Elli Distance Finder

Elli Distance Finder is an open-source web application built to solve a real problem for international and local students arriving in Joensuu, Finland — figuring out which Joensuun Elli student housing property is actually close to their university campus.

The app uses the Leaflet.js mapping library with OpenStreetMap tiles and calls the OSRM (Open Source Routing Machine) API to compute real walking, cycling, and driving travel times on-the-fly from any property to the user's chosen campus. All property data is pre-processed and stored locally to keep the UI lightning-fast.

A multi-factor filter panel lets students narrow results by travel-time radius, monthly rent budget, and apartment type (Shared / Studio / Family). Each property card also surfaces straight-line distances to the nearest supermarket, sports facility, and the city centre. The entire interface is available in both English and Finnish.

• •Interactive Leaflet.js map with dark-mode tiles and custom Phosphor icon markers
• •Live routing via OSRM API for walking, cycling, and driving modes
• •Travel-time radius filter (e.g. only show properties within a 15-minute bike ride)
• •Rent budget filter based on cheapest available unit
• •Apartment-type toggle: Shared (Solu), Studio (Yksiö), Family (Perhe)
• •Local amenity distances: supermarkets, sports facilities, city centre
• •Bilingual UI — instant EN ↔ FI toggle
• •Offline-ready pre-processed property data for blazing-fast performance
• •User feedback modal for community-driven improvements