Reproduction technology
Figure 12: 1:10,000 contour map of Castleshaw area reproduced in 1.00mm acrylic sheet. This map has also been reproduced in 0.750mm transparent PVC. Each 5.0m contour layer is represented by 0.8mm thick card [original size of mould 215mm wide x 415mm long x 47mm high along edge at top of photograph. © Crown copyright NC/01/24215