Description
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Survey Compass
Description
• Compass survey is a method of surveying by taking bearings and linear distances to produce plan.
• Bearing is measured using prismatic compass, while the linear distance is measured using measuring tape.
• Bearing in compass surveying means angle is made by chain line or survey line by referring it to magnetic meridian or magnetic north.
Related products
Abney Level
Description
The Hand Level is a small, economical level for use with preliminary surveys to determine traveller way or cable way steel work elevations and other feasibility type site reconnaissance work. The Abney Level is very similar to a clinometer in that it is used to measure the value of a slope by means of arc measure and grade percentage.Specification of Abney Level
• Used to determine slope angle, tree heights etc • Graduated 0-+/-90 degrees, 0-+/-100% on a stationary arc • Vernier reads to 10 • Scale pointer incorporates friction thumb lock • Includes carry case
Box Sextant With Leather
Description
Cylindrical brass sextant in leather case. The sextand has pull out eyepieces, silvered scale and vernier magnifier on a hinged arm. The brass cover screws onto the base as a handle. The leather case is embossed with a flower on both sides. The case has an attached cover which fastens with a strap. The inside of the case is lined with purple velvet like material. Maker's mark on sextand, embossed stamp on case.
Automatic Level
Description
a) Manufactured meticulously using International Standard. b) Tightly sealed construction for use in any weather. c) Fast accurate two-speed focusing. d) Friction-braked rotation and endless horizontal drive. e) Optical sight for quick pointing. f) Metal circular bubble. g) Fit all tripod with G5/8" or M16 screw.Optional accessories :
Metal or wooden tripod, metal or wooden staff range pole, measuring rope, plumb etc
Cross Staff
Description
The Cross-Staff was used at sea from the beginning of the 16th century until the first half of the 18th century. It was used to measure the sun's altitude, especially at the meridian passage. With the knowledge of the sun's declination, the mariner could then obtain his latitude. The staff is original, with the inscription. The cross pieces are replicas. Different cross pieces were used depending on the altitude. A different scale is on each side of the staff.
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