Copper Plate Engraver
![Black and white photo showing an engraver creating a contour plate for a topographic map](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/Copper%20plate%20engraver_1.jpg?itok=he3WVYlg)
Detailed Description
With great precision, an engraver carefully cuts away small ribbons of copper to create the contour plate for a USGS topographic map.
Sources/Usage
Public Domain.
With great precision, an engraver carefully cuts away small ribbons of copper to create the contour plate for a USGS topographic map.
Public Domain.