Alby96andClaude Opus 5
e14308bbb6
Scanned the two public ARPA Piemonte APIs and recorded what they actually contain, so this question does not get re-litigated from the marketing pages later. Neither needs a key, a token or a registration. This corrects something I got wrong. The docs said ARPA states no licence for its data, based on the open-data page saying only "gratuiti". The site's legal notice does state one — CC BY 4.0, commercial use explicitly permitted, credit "Fonte: Arpa Piemonte - www.arpa.piemonte.it" — and both APIs link that notice from their OpenAPI description, so anything they serve is covered. Only the radar volumes remain ambiguous, because their own page does not repeat the licence and the access link is still issued by email; both questions belong in the same message to ARPA. The survey's operative findings: - api_realtime carries 374 stations with coordinates, of which 286 have a rain gauge, spanning 74 m to 2820 m of elevation. - Its observations lag by about 4.5 hours on an hourly cadence, measured uniformly across every station sampled. That is the property that decides how it can be used: it is an observation archive with a publishing delay, not a real-time feed, and it must never sit next to 5-minute radar looking current. - Only 4 of 143 hydrometer stations publish guard and danger thresholds, and 5 publish a river name. A river-level warning built on this would be empty for 97% of stations, so that idea is recorded as rejected rather than pending. - Meteoweb is a 3.27-million-record historical archive plus a seismic catalogue: a research dataset, not app content. One thing is worth adopting: rain-gauge accumulations as ground truth for the radar. Radar infers rainfall from reflectivity aloft, gauges measure what reached the ground, and the network is densest exactly where Alpine terrain blocks the beam. It belongs behind the worker, clearly timestamped, once the worker exists. Also notes that the credit ARPA asks for is the full "Fonte: Arpa Piemonte - www.arpa.piemonte.it", not the bare name currently in the region config, to be adopted the moment any ARPA-sourced data is displayed. No code changes: nothing is integrated yet. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>