THE PLANE-TABLE AND ITS USE IN TOPOGRAPHICAL SURVEYING1869 |
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Página 4
... scale or proportion of nature , mechanically constructed by the measurement of angles , direct linear measurement , and tangential lines . In plane- table practice these are drawn in pencil upon the paper , which is spread upon the ...
... scale or proportion of nature , mechanically constructed by the measurement of angles , direct linear measurement , and tangential lines . In plane- table practice these are drawn in pencil upon the paper , which is spread upon the ...
Página 8
... scale of equal parts of brass or German silver ; a set of metal clamps for fastening the map to the table ; a pair of sharp dividers ; India - rubber , pencils , and a penknife , complete the list of essentials for prosecuting plane ...
... scale of equal parts of brass or German silver ; a set of metal clamps for fastening the map to the table ; a pair of sharp dividers ; India - rubber , pencils , and a penknife , complete the list of essentials for prosecuting plane ...
Página 14
... scale can at once be made and the percentage of error de- termined . When the sheet has no projection , squares of 1,000 metres constructed upon it will answer the same purpose . SCALES . The very simple and ingenious decimal system of ...
... scale can at once be made and the percentage of error de- termined . When the sheet has no projection , squares of 1,000 metres constructed upon it will answer the same purpose . SCALES . The very simple and ingenious decimal system of ...
Página 15
scale of roo , one decimetre on the map will represent an actual distance of 1,000 metres . Any other desirable scale can , of course , be used , as a given number of inches to a mile ; and in case of triangu- lating from a base , as in ...
scale of roo , one decimetre on the map will represent an actual distance of 1,000 metres . Any other desirable scale can , of course , be used , as a given number of inches to a mile ; and in case of triangu- lating from a base , as in ...
Página 16
... Scale 10,000 1 Scale of Diagram , 80,000 2.1 Ꭰ 40 ° 31 ' E Case 5 Case 4 Class 3 Clás B ass Ende.
... Scale 10,000 1 Scale of Diagram , 80,000 2.1 Ꭰ 40 ° 31 ' E Case 5 Case 4 Class 3 Clás B ass Ende.
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25 cents 50 cents accuracy adjustment alidade axis brass BRIDGES centre chain circle clamp Cloth Coast Survey construction contours correct cross-hairs curves declinatoire depression determined diagram direction distance Edition Engineers engravings Feet fiducial edge field forward line forward signal GEOLOGY OF PENNSYLVANIA Graphical Statics ground HAND-BOOK height hills horizontal Hypsometry instrument intersection line of sight lines drawn lithographic plates marked means measured meridian metal method metres middle point minutes of arc Morocco necessary objects observed Paper covers parallel pencils perpendicular placed plane plane-table plotted points point occupied point sought falls PRACTICAL TREATISE Prof projection QUALITATIVE CHEMICAL ANALYSIS resection right angles rule scale sheet shore line side sketching Slide Valve slope station Steam Steel straight edge surveyor taken tangent screw telemeter telescope tion topographer triangle of error triangulation points true point U. S. Navy vertical arc wood-cuts Yale College ZERAH COLburn
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