LAST UPDATED · SEPTEMBER 28, 2026
Licences & data sources
Oh Tidepool brings together photos and public shoreline, tide, and weather data. Each item keeps its own licence and attribution; the app aggregates them and does not relicense them. Nothing in the app's terms restricts the rights those licences grant.
Photos
Each photo is credited in the app under Settings → Photo credits, with its creator, source page, and licence link. The reviewed set is public-domain U.S. federal work, CC0, CC BY, or CC BY-SA. Where a CC BY-SA image was cropped or resized, the app states that the derivative itself is offered under the same or a later ShareAlike licence.
Public data sources
| Source | Use | Licence |
|---|---|---|
| NOAA CO-OPS | Tide predictions | U.S. federal public domain — credit NOAA CO-OPS |
| National Weather Service | Air-weather forecasts | U.S. federal public domain — credit NWS |
| Open-Meteo Marine | Wave height and sea-surface temperature | CC BY 4.0 — Open-Meteo and DWD attribution |
| NOAA NDBC | Buoy wave-height fallback | U.S. federal public domain — credit NOAA NDBC |
| USGS 3DEP | Elevation for tide-exposure modelling | U.S. federal public domain — credit USGS |
| NOAA VDatum | Vertical datum conversion | U.S. federal public domain — credit NOAA VDatum |
| SFEI CARI v3.3 | Static rocky-shore outlines | GPL-3.0-or-later — see below |
Base maps are rendered by Apple MapKit under the Apple Developer Program Licence Agreement; the Apple logo and Legal link stay visible.
CARI rocky-shore geometry — GPL-3.0-or-later
The static rocky-shore outlines are derived from the California Aquatic Resources Inventory (CARI) v3.3, published by the San Francisco Estuary Institute, and are offered under GPL-3.0-or-later. The derived geometry and the script that produced it are published here as the Corresponding Source:
- licenses/cari/ — derived outlines, importer, and provenance
- The full GPLv3 licence text
- Corresponding Source README (raw)
This geometry is a static mapped rocky-intertidal boundary. It is not a predicted waterline, navigational chart, safe route, or real-time access condition.
Questions
For licensing or attribution questions, contact support@nduwork.com.