The Principles and Practice of SurveyingContents: v. 1. Elementary surveying---v. 2. Higher surveying. |
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Common terms and phrases
accuracy accurate adjustment azimuth backsight bearing boundary bubble tube chain circle clamp compass computed contour coördinates correction Cosine Sine Cosine Cotan Tan Cotan Cotang Tang Cotang curve declination deflection angle difference direction distance dumpy level elevation engineer's scale error established exsec feet field notes grade Greenwich Mean head-chainman horizontal axis inch instrument intersection latitude length leveling screws levelman line of sight located magnetic magnetic bearings main telescope means measured ment method miles moved needle objective observations obtained offsets parallel perpendicular plane plotted plumb plumb-bob plumb-line polar axis position principal meridian protractor reading right angles rod-reading scale shaft shown in Fig side Sine Cosine Sine slope solar telescope spirit level stake station surface survey surveyor TABLE taken Tang Cotang Tang tangent screw tape target tion township transit line traverse triangle tripod true meridian usually vernier wye level
Popular passages
Page 121 - The public lands shall be divided by north and south lines run according to the true meridian, and by others crossing them at right angles, so as to form townships of six miles square...
Page 124 - Manual of Surveying Instructions for the Survey of the Public Lands of the United States...
Page 139 - The following technical and topographic features are to be carefully observed and recorded in the field during the progress of public land surveys: "1. The precise course and length of every line run, noting all necessary offsets therefrom, with the reason for making them, and method employed. "2. The kind and diameter of all bearing trees...
Page 139 - They are to state and describe particularly the meander corner from which they commenced, each one with which they close, and are to exhibit the meanders of each fractional section separately; following, and composing a part of such notes, will be given a description of the land, timber, depth of inundation to which the bottom is subject, and the banks, current, and bottom of the stream or body of water you are meandering.
Page 140 - Natural curiosities, interesting fossils, pétrifications, organic remains, etc.; also all ancient works of art, such as mounds, fortifications, embankments, ditches, or objects of like nature. 19. The...
Page 130 - Then, from the last established section corner, ie, the corner of sections 1, 2, 11, and 12, the line between sections 1 and 2 will be projected northward, on a random line, parallel to the east boundary of the township, setting a post for temporary quarter-section corner at 40.00 chains, to its intersection with the north boundary of the township.
Page 139 - The name, diameter, and distance on line to all trees which it intersects. "5. Intersections by line of land objects. The distance at which the line intersects the boundary, lines of every reservation, town site, donation claim, Indian allotment, settler's claim, improvement, or rancho; prairie, bottom land, swamp, marsh, grove, and windfall, with the course of the same at all points of intersection; also, the distances at which the line begins to ascend, arrives at the top, begins to descend, and...
Page 126 - Cedar Creek Correction Line;" and the same will be run, in all respects, like the regular standard parallels. GUIDE MERIDIANS. 127. Guide meridians shall be extended north from the base line, or standard parallels, at intervals of 24 miles east and west from the principal meridian, in the manner prescribed for running the principal meridian, and...
Page 254 - Then the posts for the batter-boards arc driven into the ground 3 or 4 ft. outside the line of the cellar so that they will not be disturbed when the walls are being constructed. On these posts, which are usually of 2" x 4" scantling, i
Page 59 - The high end of the axis is always on the same side of the vertical plane through the high point as the point last set. In readjusting the bearing cap, care should be taken...