Name/Title
S02.08.015Description
James A. Brown is working with scribecoat. Scribecoat is a clear carrier sheet with a coating of semi-soft plastic on top. Geologic contact lines were originally hand drawn by the geologist to depict the geology being mapped. Cartographers would make a negative of the hand drawn lines in the photography laboratory. The negative would be placed over the scribecoat and exposed, or burned, on the vacuum frame. When the scribecoat was washed with water afterwards, the image of the scribed lines remained. The tool Jim is using is called a scriber. It has a specific width blade that scrapes away the plastic as he traces over the lines on the scribecoat. A magnifying glass is attached to the scriber tool to see the small details of the lines the cartographer must follow. Scribing the lines produced the lines seen on the final map. Jim was a cartographer in the Publications Section of the Ohio Geological Survey. The Ohio Department of Natural Resources, Division of Geological Survey's main office was located at 1207 Grandview Avenue, Grandview Heights, Ohio 43212 from 1962 through May 1973. The Image was taken in 1971.
This slide image included in the USGS National Digital Catalog for NGGDPP Grant G15AP00115 in FY2015.Context
Man standing over table and drawing on orange map; map is on lightbox table with map-like drawings. Taken at the office in Grandview Heights, Ohio.