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Corresponding Source & Share-Alike Data

Last updated November 2026

Some data stores shipped with or downloaded by the Emrelia E3X are derived from sources licensed under share-alike terms (such as the ODbL) or the GPLv2. Under those licenses, the derived stores and the tooling that produced them are available to anyone. This page is where we publish them.

Download

The share-alike derived stores currently distributed are the vector stores built from OpenStreetMap data (roads, water, cities, airport surfaces and buildings, and the time-zone boundaries), licensed under the Open Database License (ODbL) 1.0. A complete machine-readable copy of each, free of charge to anyone, is published here:

source.emrelia.com — the derived stores for each released data pack, with a machine-readable index naming every file, its size, its upstream source, and its license.

Upstream source. The OpenStreetMap-derived stores are built from OpenStreetMap data obtained as Geofabrik regional extracts, © OpenStreetMap contributors; the time-zone boundaries are built from timezone-boundary-builder, which is itself OpenStreetMap-derived. The full license text is the Open Database License 1.0.

Written offer

For the GPLv2-licensed derived stores, this is our written offer under GPLv2 §3(b): we will give any third party a complete machine-readable copy of the corresponding source for each such store, for a charge of no more than our cost of physically performing the distribution (download links are provided free of charge). This offer is valid for at least three years from the date the store was distributed to you.

The derived vector stores built from OpenStreetMap data are Derivative Databases of the OSM database under the Open Database License (ODbL) 1.0, © OpenStreetMap contributors. As required by ODbL §4.6, a machine-readable copy of each Derivative Database — or a file describing the alterations made to the upstream database — is available under the same license, from the download link above.

What this covers

  • Derived vector stores built from OpenStreetMap data (ODbL) — currently distributed; download links above.
  • Derived airport-layout stores built from X-Plane Scenery Gateway data (GPLv2) — not currently distributed. Their corresponding source will be listed here when these stores ship.

Requesting

For a store not yet listed above, or to request a copy by other means, write to support@emrelia.com with the subject "corresponding source" and name the data store you're after. We'll provide a free download link for the derived store, its upstream source identification, and the applicable license text.