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100 link steel surveying chain, 1784

100 link steel surveying chain, 1784
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Not available to clients invoiced in the UK
Largest available format 3504 × 2513 px 1 MB
Dimension [pixels] Dimension in 300dpi [mm] File size [MB] Online Purchase
Large 3504 × 2513 px 297 × 213 mm 1.0 MB
Medium 1024 × 735 px 87 × 62 mm 850 KB

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IMAGE number
UIS5065439
Image title
100 link steel surveying chain, 1784
Auto-translated text View Original Source
Artist
Unknown
Location
Science Museum, London, UK
Medium
object
Image description

100 link steel surveying chain, 1784. Made by Jesse Ramsden, this chain was used in the Primary Triangulation of Great Britain. This was a network of measured triangles across the country, used to underpin maps. The network was checked in a number of places by setting up a base line, several miles long, and comparing measured and calculated dimensions. The first line was on Hounslow Heath and General William Roy of the Royal Engineers used this chain for its measurement. ©SSPL/Science Museum

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SSPL/UIG / Bridgeman Images
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