Method and device for land surveying

Details Method and device for land surveying Method and device for land surveying

1990-03-20

1990-11-27

Haroian, Harry N.

Geometrical instruments

Straight-line light ray type

Rod or target

G01C 1502

Patent

active

049725912

ABSTRACT:
A hub for land surveying with an electronic distance measurement (EDM) instrument and a prism pole, the hub having a taper at one end and, at the other end, a surface marked with a series of parallel lines 0.01 feet apart. When the hub is driven into the ground at the approximate location of a second traverse point and one final measurement is taken from the top of the hub, the holder of the prism pole can quickly and easily obtain the exact location of the second traverse point with no additional measurements being taken. The hub may have a second set of lines at a 90 degree angle with respect to the first to help the prism rod holder locate the true traverse line, distinguish each line in the first series of lines, and determine the center of the hub. The hub may also have markings on the side of the hub serving as a specialized ruler to assist the prism rod holder in locating the approximate second traverse point before he drives the hub into the ground.

REFERENCES:
patent: 564025 (1896-07-01), Northam

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