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SunnyDaysApp
This page lists third-party data, maps, terrain tiles, official geodata, weather sources, open-source components and provider notices used by SunnyDaysApp.
SunnyDaysApp combines multiple map, weather, terrain and open-data sources into its own app and tile system. The original providers retain their own rights, licenses and attribution requirements.
Some data may be transformed, simplified, combined, cached, tiled, styled or processed before it is shown in SunnyDaysApp. Where required, the attribution below also covers modified or derived data.
SunnyDaysApp uses or may use the following source references in the app, website, map screens, legal pages or data documentation:
SunnyDaysApp’s first target countries are Austria, Germany and Switzerland. The app may use official open/public geodata from the following national providers.
| Country | Provider | Use in SunnyDaysApp | Attribution / license note | Source |
|---|---|---|---|---|
| Switzerland | Swiss Confederation / geo.admin.ch / swisstopo | Swiss official geodata, map context, terrain/contextual data or derived map/tile information where used by SunnyDaysApp. | Source reference: © swisstopo or Federal Office of Topography swisstopo. Data may be processed or combined by SunnyDaysApp where applicable. |
geo.admin.ch swisstopo terms |
| Germany | Official surveying and geoinformation authorities of all 16 German states | State DOP20/DOP10 orthophotos used for German satellite imagery and derived thumbnails. The state sources are selected geographically and combined at state borders. | Depending on the state: CC BY 4.0, dl-de/by-2-0, or dl-de/zero-2.0. Required provider notices and modification notices are listed below. |
dl-de/by-2-0 CC BY 4.0 |
| Austria | basemap.at; BEV — Bundesamt für Eich- und Vermessungswesen where applicable | basemap.at orthophotos used for Austrian thumbnails. BEV and other Austrian official geodata may also supply terrain, landscape/elevation or map context where identified. | Thumbnail source reference: Data source: basemap.at, Creative Commons CC BY 4.0. BEV source reference: © BEV where BEV data is used. Data may be modified, processed, combined or tiled by SunnyDaysApp. |
basemap.at BEV public data BEV free products CC BY 4.0 |
German imagery and thumbnails may be transformed, reprojected, cropped, compressed and combined at state borders by SunnyDaysApp. The following notices apply to the source imagery used:
Service endpoints and official product pages are maintained in the SunnyDays Germany open-DOP source audit. No paid nationwide BKG/ZSGT orthophoto layer is used in the replacement thumbnail set.
Administrative state-boundary selection only: © GeoBasis-DE / BKG, Datenlizenz Deutschland – Namensnennung – Version 2.0 (dl-de/by-2-0). BKG VG250 boundaries select and clip the state services; BKG is not used as replacement imagery.
SunnyDaysApp uses vector map tiles from OpenFreeMap / OpenMapTiles / OpenStreetMap-based data.
| Source | Use | Attribution | Technical URL / reference |
|---|---|---|---|
| OpenFreeMap | Vector tile delivery / map tile source. | © OpenFreeMap | openfreemap.org |
| OpenMapTiles | Vector tile schema / map data structure where used through OpenFreeMap tiles. | © OpenMapTiles | openmaptiles.org |
| OpenStreetMap | Underlying community map data for vector maps. |
© OpenStreetMap contributors Data licensed under the Open Data Commons Open Database License (ODbL) 1.0. |
OpenStreetMap copyright |
The SunnyDaysApp tile pipeline uses this vector tile source pattern:
https://tiles.openfreemap.org/planet/20251231_001001_pt/{z}/{x}/{y}.pbfSunnyDaysApp uses Terrain Tiles in Terrarium encoding for elevation, terrain, hillshade, elevation-profile or route-related terrain calculations where applicable.
| Source | Use | Attribution / license note | Reference |
|---|---|---|---|
| Terrain Tiles on AWS | Global terrain/elevation tiles in Terrarium format. | Terrain Tiles by Mapzen, a Linux Foundation project. Terrain Tiles are based on multiple public terrain/elevation sources and require attribution to relevant source datasets. | AWS Open Data Registry — Terrain Tiles |
| Mapzen / Tilezen joerd attribution | Required terrain source attribution guidance. | Attribution requirements vary by source region. For SunnyDaysApp’s launch region, relevant references may include Austrian DGM data, Copernicus EU-DEM layers and other terrain sources listed by Mapzen. | Mapzen Terrain attribution |
The SunnyDaysApp tile pipeline uses this terrain tile source pattern:
https://s3.amazonaws.com/elevation-tiles-prod/terrarium/{z}/{x}/{y}.pngAdditional terrain attributions may apply if SunnyDaysApp expands coverage beyond Austria, Germany and Switzerland.
SunnyDaysApp uses weather information to help users plan sunny outdoor days. This may include cloud layers, temperature layers, forecast tiles, forecast-derived calculations and GRIB weather inputs.
| Source / category | Use in SunnyDaysApp | Attribution / note |
|---|---|---|
| Meteoblue | Weather tiles/data, especially cloud-related weather layers where used by SunnyDaysApp. | Weather data and visual layers may be provided by or derived from Meteoblue services. Provider-specific attribution and contract wording should be kept aligned with the final Meteoblue product/API/tile setup. |
| GRIB weather files | Temperature and forecast-related inputs used by SunnyDaysApp’s weather/tile pipeline. | GRIB model/source attribution depends on the final public weather model/source used in the production pipeline. SunnyDaysApp should keep this entry updated with the exact model provider and required license text. |
SunnyDaysApp uses ArcGIS Location Platform World Imagery as its online satellite basemap. The attribution shown with the live map is:
Powered by Esri | Sources: Esri, Vantor, Earthstar Geographics, and the GIS User Community
World Imagery attribution can vary as its source mosaic changes. SunnyDaysApp therefore also reads the provider attribution supplied by its production map-source configuration and displays it in the map's compact attribution control.
Where official country data, satellite data or open-data sources are processed into SunnyDaysApp tiles, the original source providers retain their own licenses and attribution rights. If a tile or layer is based on multiple inputs, several attributions may apply at the same time.
Before adding more countries, this page should be updated with the exact source providers, license names and required attribution text for those countries.
SunnyDaysApp also uses third-party services for distribution, accounts, advertising, hosting, storage, email and app operation.
| Provider | Use | Notice |
|---|---|---|
| Apple App Store | iOS distribution, Apple login and future in-app purchases/subscriptions. | Apple services are subject to Apple’s own terms and policies. |
| Google Play | Android distribution, Google login and future in-app purchases/subscriptions. | Google services are subject to Google’s own terms and policies. |
| Google AdMob | Advertising in the free app version. | AdMob advertising and consent handling are described in the Privacy Policy. |
| Hetzner Cloud | SunnyDaysApp backend hosting in Finland. | Used for API/backend infrastructure. |
| Cloudflare R2 / Cloudflare | Ultimate tile storage and delivery. | Used for tile storage, CDN/infrastructure and related delivery. |
| Google Workspace | Email for support, privacy, legal, billing and general contact. | Used for official SunnyDaysApp email addresses. |
SunnyDaysApp is built with modern app, web, map and backend technology. Some software components may be open source and subject to their own licenses.
Open-source software remains owned by its respective authors and contributors. SunnyDaysApp respects applicable open-source license terms and includes notices where required.
| Component / category | Use | License / notice |
|---|---|---|
| OpenStreetMap ecosystem | Map data and related map tooling. | © OpenStreetMap contributors; OpenStreetMap data is licensed under the Open Data Commons Open Database License (ODbL) 1.0. |
| OpenMapTiles / OpenFreeMap ecosystem | Vector tile schema, styles, public tiles or self-hosted/public tile infrastructure where used. | Attribution to OpenFreeMap, OpenMapTiles and OpenStreetMap contributors applies where used. |
| Mapzen / Tilezen terrain tooling and Terrain Tiles | Elevation/terrain tile data and attribution guidance. | Terrain source attribution applies based on source region. |
| SunnyDaysApp app and backend dependencies | Mobile app, website, backend, route calculation and tile pipeline. | Additional open-source dependency notices should be included in the app package, repository documentation or legal notice file where required by the dependency licenses. |
SunnyDaysApp app icons, website visuals, marketing screenshots, product screenshots and custom SunnyDaysApp graphics are created for SunnyDaysApp unless otherwise stated.
App-store screenshots and website screenshots may show map, weather, terrain, satellite or route data. Those visible layers remain subject to the data-source attributions listed on this page.
If third-party stock images, icon packs, fonts or illustration libraries are added later, this page should be updated with their required license notices.
SunnyDaysApp may simplify, transform, style, cache, tile, compress, merge, calculate from or otherwise process third-party data to make it usable inside the app.
Processing may include:
Where a license requires notice of modifications, SunnyDaysApp treats processed, styled, combined, tiled or derived data as modified data.
Mention of a provider, public authority, open-data source, map project, weather provider, app store or infrastructure provider does not mean that SunnyDaysApp is endorsed, certified, sponsored or approved by that provider unless this is explicitly stated.
If you believe an attribution is missing, incomplete or inaccurate, contact SunnyDaysApp so it can be reviewed and corrected.
Contact: [email protected]
Please include the affected source, the required attribution text, a link to the license or provider page, and a short explanation of the issue.