Usage Guidelines


Important information about acknowledgement and use in academic journals or the web.

NGA NextView License

The National Geospatial-Intelligence Agency’s (NGA) NextView license was developed to accommodate the desire to share commercial satellite imagery across U.S. Government agencies, contractors, and other entities supporting U.S. Government interests.

The license, however, does not apply to imagery derived products, which includes Digital Elevation Models produced from the licensed imagery.

To summarize, stereo-derived elevation models may be shared and used freely, but the optical imagery that they were created from may not.

Sharing and Copying DEMs

Unlike the commercial satellite imagery, stereo-derived elevation models produced by the PGC may be shared.

PGC offers stereo-derived DEMs of certain areas (including ArcticDEM and REMA), but in order to request a new DEM to be created by PGC, you must be a PGC core user with the proper funding.

External Use

Stereo-derived elevation models can be used in research publications when proper acknowledgement to PGC is provided.

PGC invites you to notify us when you use elevation models externally. We not only include it in our reporting, but also like to know about your interesting science!

Please refer to the PGC Acknowledgement Policy for a detailed explanation of how to cite figures, illustrations, and graphics that contain elevation models that PGC produced.


In this Guide, we’ve covered:

  • Stereo-derived elevation models are not copyright
  • Stereo-derived elevation models can be used freely
  • PGC’s requirements for acknowledgement

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