THE PLANE-TABLE AND ITS USE IN TOPOGRAPHICAL SURVEYING1869 |
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Página 7
... placed that its line of collimation is above and in the same vertical plane with the fiducial edge of the rule , though this is not absolutely necessary . Its position with regard to the edge , and its relation to it , should , however ...
... placed that its line of collimation is above and in the same vertical plane with the fiducial edge of the rule , though this is not absolutely necessary . Its position with regard to the edge , and its relation to it , should , however ...
Página 8
... placed in- side of the two square uprights , and the tangent screw made more stable by being made to play through one of the uprights on the opposite side from the arc . An arrangement for attaching a riding level to the tele- scope ...
... placed in- side of the two square uprights , and the tangent screw made more stable by being made to play through one of the uprights on the opposite side from the arc . An arrangement for attaching a riding level to the tele- scope ...
Página 10
... placed upon the table . This presupposes the plane of the board to be true . If two levels are on the rule they are examined and adjusted in a like manner . Great care should be exercised in manipulation , lest the table be disturbed ...
... placed upon the table . This presupposes the plane of the board to be true . If two levels are on the rule they are examined and adjusted in a like manner . Great care should be exercised in manipulation , lest the table be disturbed ...
Página 12
... placed against them and the telescope directed to the object . If the cross - hairs bisect it , the adjustment is cor- rect ; but if they do not , it can be corrected by means of the screws attaching the standard to the rule . 6. Zero ...
... placed against them and the telescope directed to the object . If the cross - hairs bisect it , the adjustment is cor- rect ; but if they do not , it can be corrected by means of the screws attaching the standard to the rule . 6. Zero ...
Página 13
... placed upon the telescope , or a level permanently fastened upon the top of the tele- scope parallel to the optical axis , and adjusted to the horizontal wire , will give the error at once . Plane - Table . - With regard to the plane ...
... placed upon the telescope , or a level permanently fastened upon the top of the tele- scope parallel to the optical axis , and adjusted to the horizontal wire , will give the error at once . Plane - Table . - With regard to the plane ...
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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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