THE PLANE-TABLE AND ITS USE IN TOPOGRAPHICAL SURVEYING1869 |
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Página 11
... operation should be repeated until the adjustment is complete . In using the method just given it may be taken for granted that the line of collimation revolves in the verti- cal plane of the fiducial edge , as any error arising from ...
... operation should be repeated until the adjustment is complete . In using the method just given it may be taken for granted that the line of collimation revolves in the verti- cal plane of the fiducial edge , as any error arising from ...
Página 21
... operations of field - work , the topographer must as- sure himself of the correctness of the plotted points on the sheet , by an examination of them in the field , either by actual occupation of each one , or of a sufficient number to ...
... operations of field - work , the topographer must as- sure himself of the correctness of the plotted points on the sheet , by an examination of them in the field , either by actual occupation of each one , or of a sufficient number to ...
Página 24
... operations which accompany them , will now be considered . * Custom has given this general term a specific signification in Coast Survey topographical work . T SA 2 Ch . Fig . 1 . Cup 24 THE PLANE - TABLE AND ITS USE IN.
... operations which accompany them , will now be considered . * Custom has given this general term a specific signification in Coast Survey topographical work . T SA 2 Ch . Fig . 1 . Cup 24 THE PLANE - TABLE AND ITS USE IN.
Página 26
... operation , clamp the large screw again , and the table is level . Now free the tangent screw by loosen- ing its clamp , place the edge of the ruler upon the oc- cupied point s and the point b , the telescope being directed towards the ...
... operation , clamp the large screw again , and the table is level . Now free the tangent screw by loosen- ing its clamp , place the edge of the ruler upon the oc- cupied point s and the point b , the telescope being directed towards the ...
Página 27
... operation is to " take the forward line " to the next point which it is desirable to occupy or determine , either some natural object which can be occupied , or a forward signal placed for that purpose , say the signal D. The edge of ...
... operation is to " take the forward line " to the next point which it is desirable to occupy or determine , either some natural object which can be occupied , or a forward signal placed for that purpose , say the signal D. The edge of ...
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Términos y frases comunes
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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