Practical Surveying and Elementary Geodesy: Including Land Surveying, Levelling, Contouring, Compass Traversing, Theodolite Work, Town Surveying, Engineering Field Work and Setting Out Railway Curves, with Notes on Plane Tabling, Astronomical Surveying and Heliographing

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Macmillan and Company, limited, 1913 - Geodesy - 276 pages
 

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Page 3 - At a given point in a given straight line, to erect a perpendicular to that line. Let AB be the given line and C the given point.
Page 90 - And the ordinary usage is to be observed with regard to placing the north towards the top of the plan ; writing the name of the parish as a title, with that of the county in which it is situated ; and adding the name and address of the surveyor, the date of performance, the scale and the total contents.
Page 91 - ... in red ink, and marked with a reference to the number of the line in the field-books, or to the page of the book in which the notes of the measurement are entered ; thus, L 1, L 2, L 3, &c., if referring to the lines, or P 1, P 2, P 3, &c., when referring to the pages. And when several field-books are used, each book should have a distinctive letter assigned to it, which may be added to the reference upon the plan after the number referring to the line or page ; thus, L 1, A ; P 1, B, &c.
Page 93 - The fields in which the angular points of the triangle occur are to be wholly surveyed, or enough of their boundaries ascertained to determine precisely the position of those points on the map. " The field notes are to be kept in ink in the field, and any alterations which are required to be made in them are to be attested by the initials of the surveyor, and an explanation of the cause of the alteration is to be entered.
Page 92 - When alterations are made in the field-books, an explanation of the cause of the alteration is to be entered at the same time ; and erasures in the field-books should on no account be made.
Page 92 - ... that four parcels of land, the house and the pond are all included in the quantity assigned to No. 47. " Where the whole breadth, or any portion of a road, stream, &c., is included with the adjoining field, the brace must also be used; and where only part of the road, stream, &c., is included, the exact limit to which the quantity applies must be marked with a dotted line on the plan. See No. 48, in the annexed sketch; of which the quantity is thus — shown to include the whole breadth of the...
Page 134 - It is the level of the lower edge of a stone fixed in the face of the river wall upon the east side of the Hermitage entrance to the London Docks.
Page 91 - Each separate parcel of land is to be numbered upon the plan, the numbers following in succession from No. 1 to the highest number required. These numbers are to correspond with those given in the reference book, in which must be specified the name and description of each field or enclosure, with its true quantity or contents in statute measure, the names...

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