Techniques and Methods 11–B6
This document provides the detailed requirements for producing, archiving, and disseminating a comprehensive digital collection of topographic maps for the U.S. Geological Survey (USGS) Historical Topographic Map Collection (HTMC). The HTMC is a digital archive of about 190,000 printed topographic maps published by the USGS from the inception of the topographic mapping program in 1884 until the last paper topographic map using lithographic printing technology was published in 2006. The HTMC provides a comprehensive digital repository of all scales and all editions of USGS printed topographic maps that is easily discovered, browsed, and downloaded by the public at no cost. The HTMC provides ready access to maps that are no longer available for distribution in print. A digital file representing the original paper historical topographic map is produced for each historical map in the HTMC in georeferenced PDF (GeoPDF) format (a portable document format [PDF] with a geospatial extension).
First posted December 1, 2014
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Allord, G.J., Walter, J.L., Fishburn, K.A., and Shea, G.A., 2014, Specification for the U.S. Geological Survey Historical Topographic Map Collection: U.S. Geological Survey Techniques and Methods, book 6, chap. B11, 65 p., https://dx.doi.org/10.3133/tm11B6.
ISSN 2328-7705 (online)
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Appendix A. Relational Database Structure for HTMC Metadata Fields
Appendix B. HTMC Metadata Glossary
Appendix C. HTMC Metadata Report Fields
Appendix D. Example CSV Downloadable Metadata File
Appendix E. FGDC Compliant Metadata Example