Theodolites, Land Surveying Theodolites, Land Surveying Instruments. A Theodolite is a instrument for measuring both horizontal and vertical angles, as used in triangulation networks, and geo- location work. It is a tool used in the land surveying and engineering industry, but theodolites have been adapted for other specialized purposes as well. Other specialized purposes make Theodolites ideal for shop and factory floor layout of tools and fixtures. They also work well for layout for the construction of concrete slabs, swimming pools, golf courses, landscaping, and road design. A 2- second theodolite is more accurate than a 5 or 9- second theodolite. If you think about the horizontal circle that a theodolite rotates around, the circle is divided into 3.

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Basic Surveying - Theory and Practice Route Survey: Refers to those control, topographic, and construction surveys necessary for the location.

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Each degree is divided into 6. The horizontal angle is the measure of inaccuracy (hence accuracy) that a theodolite can horizontally measure or locate within. If a theodolites accuracy rating is 2 seconds (written 2.

Generally speaking, a 9 second theodolite is for construction sites where you're working relatively up close, say within 2. A 2 second you would work 2,0. Most building contractors, whether residential or commercial, can use a 9 second theodolite without experiencing problems due to accuracy. At this distance, more errors are in the form of human errors, such as not leveling the instrument properly or taking a quick reading which lends itself to human error. Jpg To Pdf Converter Free Download Full Version With Crack Head.