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The Historic American Buildings Survey (HABS), Historic American Engineering Record (HAER), and Historic American Landscapes Survey (HALS) are programs of the National Park Service established for the purpose of documenting historic places. Records consists of measured drawings, archival photographs, and written reports.
In 1933 the Park Service established the Historic American Buildings Survey following a proposal by Charles E. Peterson, a young Park Service landscape architect. It was founded as a make-work program for architects, draftsmen and photographers left jobless by the Great Depression. Guided by field instructions from Washington, D.C., the first HABS recorders were tasked with documenting a representative sampling of America's architectural heritage. By creating an archive of historic architecture, HABS provided a data base of primary source material for the then fledgling historic preservation movement.