Data sources and accuracy
Every signal in Nearside traces to a named source. Here's what powers each part, and how much to trust it.
Every signal in Nearside traces to a named source. Here's what powers each part, and how much to trust it.
Nearside combines several open and commercial data sources. We tell you which one produced each signal, and how representative it is.
Amenity discovery, real on-foot walk-times, terrain/elevation and door-to-door commute times come from Google Maps Platform. Ratings and review counts drive the credible-review filter.
Current AQI comes from the nearest live monitoring station via the World Air Quality Index project. We always show the station's distance so you can judge how representative it is, and we never show a stale or far-away reading — if no live station is close enough, the panel simply doesn't appear.
Season and rainfall profiles are aggregated from Open-Meteo's historical weather reanalysis, averaged over recent years into typical monthly rainfall and temperature.
The monsoon/flood read is our own estimate, combining terrain (does the point sit low?), monsoon rainfall and nearby mapped water/drains from OpenStreetMap. It's a screening signal with its reasons shown — not an official flood survey.
We rate places, not people. We don't infer crime rates, demographics, or anything about who lives somewhere. Proxies (terrain, noise, flood) are clearly labelled as estimates, never dressed up as measured facts.
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