Credits and Data Sources
Last updated 2026-10-25
Night Gaze Camp is built from public data and open-source software. Thank you to everyone who publishes them.
Data
| Source | What we use it for | Licence or terms |
|---|---|---|
| VIIRS Nighttime Lights (VNL), Earth Observation Group, Payne Institute for Public Policy, Colorado School of Mines | Basis of the estimated sky darkness | CC BY 4.0 |
| NASA Black Marble (VNP46A4 / VJ146A4), NASA LAADS DAAC | Second source for night-light data | NASA open data; citation requested (DOI 10.5067/VIIRS/VNP46A4.002) |
| U.S. Census Bureau TIGER/Line (roads and state boundaries) | Base map layers in offline packs | US government public domain |
| NOAA Space Weather Prediction Center (OVATION aurora model, Kp index) | Aurora chances and the aurora visibility line | US government data |
| US National Weather Service (api.weather.gov) | Cloud-cover forecasts | US government data |
| Recreation Information Database (RIDB), Recreation.gov | Federal campground records | US government public data |
| National Park Service (NPS) data | National park units | US government public data |
| Yale Bright Star Catalogue, 5th revised edition (Hoffleit and Warren 1991, CDS catalogue V/50) | Star positions, magnitudes and colours in the website star map | No copyright statement; distributed by NASA NSSDC / ADC, treated as public domain |
| IAU Working Group on Star Names (IAU-CSN) | Names of bright stars in the star map | CC BY 4.0, attribution: IAU |
| IAU / Sky & Telescope constellation charts | Reference for constellation figures | CC BY 4.0, attribution: IAU |
| NASA Planetary Fact Sheet (nssdc.gsfc.nasa.gov) | Planet sizes and distances in the scale model, angular size and orrery tools | NASA public domain |
| NASA Eclipse Web Site (eclipse.gsfc.nasa.gov, Fred Espenak) and AstroPixels | Independent eclipse and Moon phase tables used to test our calculations | Used for checking only; no data is republished |
| International Meteor Organization (IMO), Meteor Shower Calendar | Shower peaks, ZHR and radiant data in the meteor tools | Published facts, cited per page |
| SIMBAD, CDS Strasbourg | Coordinates of the bright stars listed in the sidereal time tool | Free use with acknowledgement |
Sky darkness attribution. This product was made utilizing Visible Infrared Imaging Radiometer Suite (VIIRS) Day/Night Band nighttime lights data produced by the Earth Observation Group, Payne Institute for Public Policy, Colorado School of Mines. We modified the data: it is combined from surrounding areas, resampled and converted into estimated sky brightness values. Source: EOG, Colorado School of Mines.
Aurora. The aurora visibility line is calculated by Night Gaze Camp from the NOAA OVATION aurora model grid and is based on NOAA data. It is not an official NOAA product and NOAA does not endorse it.
Weather. Forecast data from the US National Weather Service. Night Gaze Camp is not an official NWS product.
No government endorsement. Night Gaze Camp is not affiliated with, endorsed by or sponsored by NOAA, the National Weather Service, the National Park Service, Recreation.gov, NASA, the U.S. Census Bureau or any other government agency. The same list with links is in the app under More > Data sources.
Software
Open-source libraries in the app, with their licences:
- suncalc 2.1.1 (BSD-2-Clause): sun and moon positions, phases and times in the app
- astronomy-engine 2.1.19 (MIT, Don Cross): sun, moon and planet positions, phases, rise and set times and eclipses in the website tools
- d3-celestial (BSD-3-Clause, Copyright 2015 Olaf Frohn): constellation figures, names and label positions in the website star map
- maplibre-gl 6.15.0 (BSD-3-Clause): map display
- pmtiles 4.5.0 (BSD-3-Clause): reading offline map packs on the phone
- capacitor-plugin-cdv-purchase 13.19.1 (MIT): in-app purchases through StoreKit and Google Play Billing
- Capacitor 8.5.3 (MIT) and its plugins for geolocation, local notifications, files, sharing, preferences and app events (MIT)
- @cantoo/pdf-lib 2.11.1, @cantoo/fontkit 2.0.12 and bidi-js 1.1.0 (MIT): the trip PDF, with real text, Arabic shaping and right-to-left layout
- Noto Sans, Noto Sans JP, KR, TC, SC and Arabic (SIL Open Font License 1.1): fonts embedded in the trip PDF (subsets)
- @capacitor/haptics 8.0.2 (MIT): the vibration when Pro is unlocked
Build-time tools that are not part of the app: tippecanoe (BSD-2-Clause), pyshp (MIT), numpy and scipy (BSD), Pillow (MIT-CMU), esbuild (MIT).
Not used
We do not use data from light-pollution maps or lists that do not allow commercial use. If you think we have used your material incorrectly, email support@nightgazecamp.com.