Heritage Documentation Programs (HDP) administers Historic American Buildings Survey (HABS), established in 1933 under the Works Progress Administration, and companion programs Historic American Engineering Record (HAER) established in 1969, Historic American Landscapes Survey (HALS) established in 2000. Documentation produced through the programs constitutes the nation's largest archive of historic architectural, engineering, and landscape documentation. Since its inception, photography produced for HDP consisted of perspective corrected, large-format archival film negatives created with a view camera. HDP is currently examining digital photography to determine if it can meet the Secretary of the Interior's Standards and Guidelines for Architectural and Engineering Documentation that govern the documentation produced for the collection.
Anne Mason, Stephen Schäfer, "Focus on the Future: Creating Born-Digital Standards for Large-Format Photography" in Proc. IS&T Archiving 2013, 2013, pp 183 - 185, https://doi.org/10.2352/issn.2168-3204.2013.10.1.art00040