The Plane-table and Its Use in Topographical SurveyingD. Van Nostrand, 1869 - 79 páginas |
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Página 11
Alexander Medina Harrison. will deviate from it to the same side both upon elevation and depression . In the second case the movement of the cross - hairs will be in a straight line oblique to the hori- zontal , and , when made to cover ...
Alexander Medina Harrison. will deviate from it to the same side both upon elevation and depression . In the second case the movement of the cross - hairs will be in a straight line oblique to the hori- zontal , and , when made to cover ...
Página 12
... elevation or depression of a distant object , remove the instrument to that object , and measure : 253403331 } ! the angle of depression or elevation of 12 THE PLANE - TABLE AND ITS USE IN.
... elevation or depression of a distant object , remove the instrument to that object , and measure : 253403331 } ! the angle of depression or elevation of 12 THE PLANE - TABLE AND ITS USE IN.
Página 13
... elevation : Set up the table and level it carefully on any level piece of ground between two equi- distant points A and B , say 600 or 800 metres apart . Determine with the table the difference of level of these two points , and remove ...
... elevation : Set up the table and level it carefully on any level piece of ground between two equi- distant points A and B , say 600 or 800 metres apart . Determine with the table the difference of level of these two points , and remove ...
Página 48
... elevation of the country surveyed , and it should be easy and natural , and not a stiff copy of con- ventional signs . Nothing should be left uncertain afterwards puzzled out or guessed at . ble , all work should be drawn in the or ...
... elevation of the country surveyed , and it should be easy and natural , and not a stiff copy of con- ventional signs . Nothing should be left uncertain afterwards puzzled out or guessed at . ble , all work should be drawn in the or ...
Página 50
... elevations and depressions , in their form and course , follow , or rather are a part of a general system of nature , however capriciously detached localities or even extended areas may appear to be excepted from the general law . Where ...
... elevations and depressions , in their form and course , follow , or rather are a part of a general system of nature , however capriciously detached localities or even extended areas may appear to be excepted from the general law . Where ...
Otras ediciones - Ver todas
The Plane-table and Its Use in Topographical Surveying Alexander Medina Harrison Vista completa - 1884 |
A Treatise on the Plane-Table and its use in Topographical Surveying: (From ... Vista completa - 1870 |
Términos y frases comunes
accuracy adjustment alidade axis brass Brevet Bridge centre chain Chemistry circle clamp Cloth Coast Survey construction contours correct cross-hairs declinatoire depression detail determined diagrams direction distance draw edition elevation engravings experiments Feet fiducial edge field formula forward line ground heights hills horizontal Hypsometry Illustrated instrument intersection Iron J. P. WHITNEY line of sight lines drawn lithographic plates manufacture marked measured ment meridian Merrimack River method metres metric system middle point Mines objects observed paper parallel pencils perpendicular placed plane Plane Table plane-table plotted points point occupied position PRACTICAL TREATISE Prof projection Railway resection revised and enlarged rule scale sheet side sketching slope station Steam Engine steel straight edge Students Submarine surveyor taken tangent screw Telegraph telemeter telescope tion TOPOGRAPHICAL SURVEYING triangle of error triangulation points true point Trusses U. S. Army U. S. Navy vertical arc wood-cuts ZERAH COLBURN