Privacy Policy
Dyaan is built to hold as little of your data as possible. This policy explains exactly what we store, why, and the choices you have. It is written to match what the software actually does.
What we store
- Account: your email address, display name, and a bcrypt hash of your password (or your Google/GitHub identifier if you sign in with a provider). We never store your password in readable form.
- Sessions: an opaque session id, your browser’s user-agent string and an expiry, so you can stay signed in and revoke sessions.
- Saved areas: a name and four map coordinates for each area you choose to save.
- Password resets: a single-use token and its expiry.
What we do not do
- No third-party analytics or advertising trackers are loaded. Dyaan is ad-free.
- We do not sell, rent or share your personal data.
- No satellite imagery or raster data is retained about you; analyses run per request against public archives and are cached only briefly in memory.
Why we store it
Solely to run the Service: to sign you in, keep you signed in, let you save and reopen areas, and reset your password. We do not use your data for profiling or marketing.
Third parties contacted to serve you
When you run an analysis, Dyaan’s server (not your browser) requests data from public archives including NASA FIRMS, the JRC Global Surface Water archive, Copernicus/Sentinel and OpenStreetMap Nominatim. Your browser loads basemap tiles directly from Esri, OpenStreetMap and NASA GIBS, and web fonts from Google Fonts. These providers see standard request information (such as your IP address) as any website visit would; we do not send them your account details.
Cookies
Dyaan sets one essential, HTTP-only session cookie so you can stay signed in. There are no advertising or tracking cookies.
Retention
Account and saved-area data are kept while your account is active. Sessions and reset tokens expire automatically. Deleting your account removes its sessions, saved areas and reset tokens by cascade.
Your rights
You can access the data tied to your account, correct your display name, and delete your account and its data. To request access or deletion, email hello@dyaan.org and we will act on it.
Changes & contact
We will reflect any material change by the effective date above. Questions or requests: hello@dyaan.org.