THE PLANE-TABLE AND ITS USE IN TOPOGRAPHICAL SURVEYING1869 |
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Página 13
... metres apart . Determine with the table the difference of level of these two points , and remove the table to A. Measure carefully the distance from the ground to the centre of the axis of the telescope , and add or subtract this from ...
... metres apart . Determine with the table the difference of level of these two points , and remove the table to A. Measure carefully the distance from the ground to the centre of the axis of the telescope , and add or subtract this from ...
Página 14
... metres constructed upon it will answer the same purpose . SCALES . The very simple and ingenious decimal system of scales for maps adopted by the French is that in use upon the Coast Survey . In this system the scale of any map is ...
... metres constructed upon it will answer the same purpose . SCALES . The very simple and ingenious decimal system of scales for maps adopted by the French is that in use upon the Coast Survey . In this system the scale of any map is ...
Página 15
... 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 a reconnoissance , no scale even need be adopted . By assuming two points on the ...
... 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 a reconnoissance , no scale even need be adopted . By assuming two points on the ...
Página 17
... metres of the seconds of latitude and longitude , according to which the points are now plotted on the sheet by measuring from the corresponding minutes . Thus in the diagram the distance J represents the seconds of latitude K , the ...
... metres of the seconds of latitude and longitude , according to which the points are now plotted on the sheet by measuring from the corresponding minutes . Thus in the diagram the distance J represents the seconds of latitude K , the ...
Página 18
... to draw squares of 1,000 or any specified number of metres on the sheet , by means of which the projection can ultimately be laid down correctly . FIELD - WORK . - General Remarks . - In 18 THE PLANE - TABLE AND ITS USE IN.
... to draw squares of 1,000 or any specified number of metres on the sheet , by means of which the projection can ultimately be laid down correctly . FIELD - WORK . - General Remarks . - In 18 THE PLANE - TABLE AND ITS USE IN.
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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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