HAERHistoric American Engineering Record
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The archival grayscale HABS/ HAER images approach 20 Mb.
HABS and HAER are ongoing programs of the National Park Service, which keeps detailed information on the materials from each architectural site in a relational database.
Since HABS and HAER are ongoing programs generating new surveys, new copies of the database are retrieved regularly from the National Park Service, transformed, and re-indexed.
Experience with the large FSA-OWI and HABS/ HAER collections suggests directions that online browsing, treatment of pictures in groups, and free text retrieval can reduce the need for full cataloging of individual items.