Methodology
Every street on Callejear.at gets a composite Straßen-Score from 0 to 100. The score is a weighted average of five sub-scores, each computed deterministically from public data.
Weighting
| Dimension | Weight | Signals |
|---|---|---|
| Walkability | 30% | POI density within 500/1000/1500m buffers with distance decay |
| Public transport (ÖPNV) | 25% | Distance to nearest stop, frequency, line types (metro/tram/bus) |
| Local amenities | 20% | Shops, supermarkets, bakeries, post offices, banks |
| Green space | 15% | Parks, playgrounds, urban forest within walking distance |
| Centrality | 10% | Relative position to municipal centre + population density |
Lifestyle profiles
In addition to the composite score, every street shows 5 lifestyle-fit scores, each with a different weighting — for families, seniors, car-free living, investors and students. High-traffic streets (highway classification: primary/secondary, speed ≥ 50 km/h, or 4+ lanes) have their "Families" and "Seniors" profiles capped, with an honest reason shown on the page.
Data sources
- OpenStreetMap (Geofabrik extract) — street geometry, POIs, infrastructure tags. Monthly refresh.
- Statistik Austria — municipality-level demography and income. Annual refresh.
- WKO Immobilienpreisspiegel — real-estate benchmarks. State-level only; pages are explicitly labelled to prevent false precision.
- GTFS feeds — public-transport routes. Currently Wiener Linien; expanding to ÖBB/VOR/VVT.
What we do NOT claim
- We do not claim street-level real-estate precision — prices are state averages.
- We do not measure noise (yet) — this is on the roadmap via the Austrian Federal Environment Agency Lärmkataster.
- We do not track crime data — no reliable street-level source exists for Austria.