Drawing over lines on a draft of a large-scale map, to show the draughtsperson which lines they had already completed.
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See full size image Caption: Drawing over lines on a draft of a large-scale map Description: Drawing over lines on a draft of a large-scale map, to show the draughtsperson which lines they had already completed. Alt text: Digitising Image credit: Image credit: © Crown Copyright. All rights reserved. Photo subject date: |