Standard Interchange Format
Standard Interchange Format, called SIF, is a geospatial data exchange format. A standard or neutral format used to move graphics files between DOD Project 2851 and is currently codified in Content Standard for Digital Geospatial Metadata maintained by the Federal Geographic Data Committee.
Unit 69 of the NCGIA Core Corriculum in GIS states that SIF is a "popular data exchange format for many GIS packages" and was "developed to support exchange of data between Intergraph and other systems."
Additional criticism of SIF, along with recognition of SIF's ubiquity and utility for exchanging data, is acknowledged in the online journal article "Is a Standard Terrain Data Format Necessary?"
- Federal Geographic Data Committee. FGDC-STD-001-1998. Content standard for digital geospatial metadata (revised June 1998). Federal Geographic Data Committee. Washington, D.C. Available on-line 
- Goodchild, M.F., and K.K. Kemp, eds. 1990. NCGIA Core Curriculum in GIS. National Center for Geographic Information and Analysis, University of California, Santa Barbara CA.
- Standard Interchange Format (SIF), Navteq, Chicago, Ill, http://www.navteq.com/
- BOREAS Staff. 2000. Vector Topographic Map Data over the NSA and SSA in SIF Format. Data set. Available on-line  from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A.
- "Is a Standard Terrain Data Format Necessary?" Sabrina Sestito and David Marlow : Air Operations Division, DSTO, PO Box 4331, Melbourne Vic 3001, Australia available online at