The Digital Geographic Information Exchange Standard (DIGEST) was developed by the DGIWG (previously known as the Digital Geographic Information Working Group) to support efficient exchange of Digital Geographic Information among nations, data producers, and data users. It was designed as a "family of standards" capable of supporting the exchange of multiple data types (e.g. vector). DIGEST was first published in June 1991 with the release of Edition 1.0. It underwent a number of revisions and was last issued in September 2000 with the release of Edition 2.1.
- Part 1 is a brief General Description of the standard.
- Part 2 consist of Theoretical Model, Exchange Structure, Encapsulation Specifications (Annexes A through D) and a Standard ASCII Table of Contents (Annex E). The Part 2 encapsulations include: Annex A - Bulk interchange using the ISO 8211 data descriptive file format; Annex B - Transaction and update using the ISO 8824/8825 telecommunication standard; Annex C - Vector products using the Vector Relational Format corresponding to U.S. MIL-STD-2407; Annex D - Imagery using the NATO Secondary Imagery Format corresponding to ISO 12087-5, Basic Imagery Interchange format (BIIF)
- Part 3 consists of Codes and Parameters
DIGEST is no longer maintained by DGIWG but is provided here because legacy systems are still operating that are based on this standard.