About the Collection
Measuring 14 ½ x 20 inches the Polyconic Projections were first published in the late 19th Century. Some were produced by the Army, others by the Corps. of Engineers and the remainder were produced by the United States Geological Survey (USGS). The scale is 1:62500. The contour intervals vary. Measurements are shown in miles, feet and kilometers.
The final maps in the series were produced in the early 1970's. All later Topographic Maps of South Carolina are produced by the USGS in their present 7 ½ Minute format. The later 15 Minute maps created were reproductions of earlier editions, due to lack of sufficient changes in the area covered and by lack of funding submitted by the State. At the time, the State was expected to contribute funds toward the production of the maps.
Thanks to the Map Library's Chris Hare for scanning and preparing this collection and allowing the Digital Activities Department to load it. The project could also not have been completed without the work of Tony Branch from the Systems Department, Kate Boyd, Gianina Ferraiuolo (2006, MLIS Library Science) and Laura Coleman (2006, MLIS Library Science) from the Digital Activities Department, and Douglas King of Cataloging.
Creating the Digital Collection
This collection of 236 maps was scanned on a Ideal Crystal Tx40 wide format scanner. Chris scanned the images as color TIFFs at 24-bit and 300 ppi. From the TIFFs Gianina created high quality JPEGs, which were then uploaded to CONTENTdm and compressed as JPEG2000s at that time. The TIFFs will be maintained as the archival masters on a SAN server, backed-up to DVD and tape.
Laura created a home page for the collection, and, with the help of Doug, Gianina created the metadata in an Excel spread sheet. The metadata records follow the Western States Best Practices Dublin Core format and were uploaded as a tab delimited file at the same time as the images. Kate reviewed the collection and uploaded the images to the CONTENTdm database. Tony Branch is the systems administrator for the CONTENTdm database and helps to manage the computers and scanners in the Digital Activities Department.