In this guide
Last Updated: February 23, 2017
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.
Related Guide: Commercial Imagery Usage Guidelines
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.
Related Guide: Introduction to User Services
Stereo-derived elevation models can be used in research publications when proper acknowledgement to PGC is provided.
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.
Related Guide: PGC Acknowledgement Policy
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