THE PLANE-TABLE AND ITS USE IN TOPOGRAPHICAL SURVEYING1869 |
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Página 9
... hands , a well - made instrument may be used under unfavorable conditions for a long time without being perceptibly af fected . One should not fail , however , to make occasional examinations , and , while at work , if any difficulty be ...
... hands , a well - made instrument may be used under unfavorable conditions for a long time without being perceptibly af fected . One should not fail , however , to make occasional examinations , and , while at work , if any difficulty be ...
Página 18
... hand , plotting by distances is the only resource left , and , of course , great care is absolutely necessary . It has sometimes been found expedient to carry on a plane - table survey in advance of the triangulation , or where the ...
... hand , plotting by distances is the only resource left , and , of course , great care is absolutely necessary . It has sometimes been found expedient to carry on a plane - table survey in advance of the triangulation , or where the ...
Página 19
... hands , and when using a boat , six . Satisfactory work has been done , however , with three , and on very , rare ... hand , and a relief is afforded to the arm by being freed for a while from its weight TOPOGRAPHICAL SURVEYING . 19.
... hands , and when using a boat , six . Satisfactory work has been done , however , with three , and on very , rare ... hand , and a relief is afforded to the arm by being freed for a while from its weight TOPOGRAPHICAL SURVEYING . 19.
Página 20
... hand ready for reference . It has been suggested that it would be an advantage to have it engraved upon the rule of the alidade , and it has also been proposed to have the scale drawn upon the sheet , and thus afford a correction of ...
... hand ready for reference . It has been suggested that it would be an advantage to have it engraved upon the rule of the alidade , and it has also been proposed to have the scale drawn upon the sheet , and thus afford a correction of ...
Página 26
... hands until B is seen in the field of the telescope ; clamp the tangent screw and turn it till the intersection of the cross - hairs bisect the top or centre of the spire B. The table is now " in position , " if the plotted points be ...
... hands until B is seen in the field of the telescope ; clamp the tangent screw and turn it till the intersection of the cross - hairs bisect the top or centre of the spire B. The table is now " in position , " if the plotted points be ...
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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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