THE PLANE-TABLE AND ITS USE IN TOPOGRAPHICAL SURVEYING1869 |
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Página 49
... country which is to be surveyed . A rapid examination of the ground , by showing whether it lies in regular parallel ridges and 4 intervening valleys , isolated hills , gradually sloping plains , TOPOGRAPHICAL SURVEYING . 49.
... country which is to be surveyed . A rapid examination of the ground , by showing whether it lies in regular parallel ridges and 4 intervening valleys , isolated hills , gradually sloping plains , TOPOGRAPHICAL SURVEYING . 49.
Página 50
... hills in the section of country under survey , the topogra- pher will be able to give a naturalness to a sheet , which , by a mere formal , though correct , delineation by prescribed rules , he could not effect . It is to be observed ...
... hills in the section of country under survey , the topogra- pher will be able to give a naturalness to a sheet , which , by a mere formal , though correct , delineation by prescribed rules , he could not effect . It is to be observed ...
Página 51
... hills by the contrast between the fore slope ( on the lee side , ) which is steep , and the near slope ( on the windward side ) , which is gradual . Succes- sive surveys on sandy coasts , where close attention has been given to the ...
... hills by the contrast between the fore slope ( on the lee side , ) which is steep , and the near slope ( on the windward side ) , which is gradual . Succes- sive surveys on sandy coasts , where close attention has been given to the ...
Página 52
... hills over an extended and diversified area , and long practice and close observation only can give facility and accuracy in its execution . Various methods , more or less defective , in presenting a correct idea of elevations and ...
... hills over an extended and diversified area , and long practice and close observation only can give facility and accuracy in its execution . Various methods , more or less defective , in presenting a correct idea of elevations and ...
Página 53
... hill is the outline or trace formed with its surface by a vertical plane cutting the hill in any direc- tion . The annexed diagram , from actual survey ( Plate No. 5 ) , shows the profile , through the line A ' B ' , of the hill H , as ...
... hill is the outline or trace formed with its surface by a vertical plane cutting the hill in any direc- tion . The annexed diagram , from actual survey ( Plate No. 5 ) , shows the profile , through the line A ' B ' , of the hill H , as ...
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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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