Last edited by Malagar
Saturday, August 1, 2020 | History

2 edition of Contour survey by topographical Abney level and trailer tape found in the catalog.

Contour survey by topographical Abney level and trailer tape

N. J. Masani

Contour survey by topographical Abney level and trailer tape

by N. J. Masani

  • 200 Want to read
  • 10 Currently reading

Published by Manager of Publications in Delhi .
Written in English

    Subjects:
  • Topographical surveying

  • Edition Notes

    On cover: India Forest Research Institute and Colleges.

    Statementby N. J. Masani.
    ContributionsDehra Dūn (India). Forest Research Institute.
    Classifications
    LC ClassificationsTA590 .M358
    The Physical Object
    Paginationii, 30 p.
    Number of Pages30
    ID Numbers
    Open LibraryOL280086M
    LC Control Numbersa 64008578
    OCLC/WorldCa1392969

    The elevation or differences in elevation on the surface is usually shown as contours. A contour line is a line that connects points of equal elevation. There is usually a contour interval set, say 1-foot for conventional survey. An aerial topo survey may have a contour interval of 2-foot to 5-foot typically. the tape are used to maintain and measure a level line. ' ' ' ' ' In the second method, foresters may use a 1- or 2-chain trailer tape and an abney level with a topographic scale graduated in percentages of 66 feet. The head chainer moves up or down the slope until the full length of the tape is reached.

    6. When you plan a topographical study, the most important rule to remember is that you must work from the whole to the part, keeping in mind all of the work you will need to do as you begin the first ent types of survey require different levels of accuracy, but you should lay down the first points of each survey as accurately as possible. The contour lines depict height over sea level and are drawn in contour lines intervals. The interval is a vertical distance, which is chosen according to terrain and according to the scale of the map. So, convenient reading of contour lines is provided. The interval might be for example every 10 m, every 50 m.

      this graduated ring angle of slopes can be read off. It is less accurate than abney level. 9 Abney Level This instrument is generally used to obtaine roughly the slope angle of the ground. It consists of a rectangular, telescopic tube (without lenses) . An Abney level and clinometer, is an instrument used in surveying which consists of a fixed sighting tube, a movable spirit level that is connected to a pointing arm, and a protractor scale. An internal mirror allows the user to see the bubble in the level while sighting a distant target. It can be used as a hand-held instrument or mounted on a Jacob's staff for more precise measurement, and.


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Contour survey by topographical Abney level and trailer tape by N. J. Masani Download PDF EPUB FB2

Get this book in print. AbeBooks; The Abney Level Handbook United States. tape method telescope tube topo topographic Abney topographic graduations topographic limb Topographic Per cent topographic surveys topographic tape trail trailer tape triangulation unit length vertical wanna.

Contour survey by topographical Abney level and trailer tape by N. Masani 1 edition - first published in as the contour method. Contours are lines drawn at equal eleva­ tions above sea level, every point upon a contour being, or being supposed to be, at the elevation indicated by that line.

These con­ tours would become shore lines if the level of the sea were raised successively to the heights indicated by by: 5. transfer/alienation of Govt land, due process has been initiated at the Govt level.

Plant layout has been developed showing locations of various equipments/ devices in the main power plant. OTPC invites offers with this Tender to carryout Topographical survey / Contour survey as per GSI norms (at 1mtr/3mtr Interval) required for the project.

These datasets are not the ones that appear on the U.S. Geological Survey's USTopo GeoPDFs. Constraints: There is no guarantee or warranty concerning the accuracy of the data. Users should be aware that temporal changes may have occurred since these data were collected generated and that some parts of these data may no longer represent actual Publish Year: extent of land parcels and topographical features.

Surveying encompasses the following categories: 1. Geodetic Surveys - Surveys, which establish control networks on a mathematical datum so that measurements will reflect the curved (ellipsoidal) shape of the earth.

Land Surveys - Surveys which include retracement ofFile Size: 3MB. A topographical survey is usually carried out by a team of experienced surveyors, armed with equipment including total stations, GPS equipment, laser measurement devices and tape measures.

A total station is a tripod-mounted device used by surveyors to accurately plot single points which can be joined into lines and arcs to form a drawing of a.

Carrying out topographical survey and preparation of plans (maps) and report of the entire area/areas indicated for locating the power plant and its other systems. Carrying out bench mark (GTS / any other reference bench mark approved by the engineer-in-charge) to site/sites under survey File Size: KB.

In coastal topographic surveys it is also essential to locate all aids to navigation within the surveying area; if required, the horizontal and vertical geodetic control network should be made denser.

In all these cases, it is essential that the reference system for the topographic survey. We live in a 3 dimensional world.

Yet when a property survey is made, the results are shown via a 2 dimensional product - good ole paper and ink. A Topographical Survey is a 2-D representation of what is happening in the real world (3-D).

The characteristics of a topographical survey can vary, b. THE ABNEY LEVEL HANDBOOK 19 topographic umb Measukement ov Lines topographic abney * and topographic tape method Unit chain lengths. — The topographic Abney and the topographic tape, as described in chapter 2, are probably the most satisfactory equipment for.

Topographic surveying in Calgary, Edmonton, or anywhere else also takes into account differences in elevation, which are marked on the survey by contour lines. Contour lines detail where the terrain meets a specific elevation value on any given site, and can be interpreted to show where there are depressions and rises in the ground.

The data that a surveyor obtains when performing a topographic survey can be shown in a series of lines called contour lines. The proximity of these lines to one another is a direct correlation to the “peaks and valleys” that occur on the property.

Here is some information and examples on to ho. Making topographical surveys with non-sighting levels: You can also make topographical surveys along straight lines by using non-sighting levels, such as the line level (see Section ) or the flexible-tube water level (see Section ).

You have already learned how to measure height differences by using the square-grid method with such. Shradha Land Surveyors. We have 25+ years of experience.

Our reputation in land survey industry has largely been counted by the shooting popularity of our offered Contour Survey. This survey is imparted in a precise and prompt manner by our experienced team members who always strive hard to gain the maximum satisfaction of the clients by providing them with well managed survey.

The topographic survey will also show above ground improvements like buildings, utility poles, retaining walls, etc. The elevation or differences in elevation on the surface is usually shown as contours.

A contour line is a line that connects points of equal elevation. There is usually a contour interval set, say 1-foot for conventional survey. If contour lines are meeting in some portion, it shows existence of a vertical cliff (Fig.

Fig. If contour lines cross each other, it shows existence of overhanging cliffs or a cave (Fig. Fig. Uses of Contour Maps. Contour maps are extremely useful for various engineering works. They will learn to use an abney level and a stadia rod to collect data.

They will then create a topographic map of the given area. After the lab, students will create a topographic profile of the study area. To close, students will use a topographic map of our county to learn more about the area they live in.

Key vocabulary: topographic map. This banner text can have markup. web; books; video; audio; software; images; Toggle navigation. Manufacturer of Land Survey Work - Topographic Survey Works, Contour Survey Works, Building Survey Works and Road Survey Works offered by Level Tech, Chennai, Tamil Nadu.

Abney Level +2 more products +View All. If the objects are located by the transit-and-tape method, a field book has to be entered while measuring the traverse legs. In. i) Chain tape surveys ii) Compass surveys iii) Plane table surveys iv) Theodelite surveys Classification based on the surface and the area surveyed i) Land survey Land surveys are done for objects on the surface of the earth.

It can be subdivided into: (a) Topographic survey: This is for depicting the (hills, valleys, mountains, rivers, etc)File Size: 2MB.current use of an Abney level is in forestry for the height measurement of trees, but it is still used as a convenient “miniature theodolite” in topological surveys.

A typical Abney level, available from York Survey, is shown in the photograph below. The black square cross-section 2cm by 2cm sighting tube measures about 18cm long. The File Size: KB.TOPOGRAPHIC SURVEY A chosen scale while in map many textile has to be represented in symbol Topographic plan survey are used for engineering or design and administrative purpose only whereas topographic map are found useful in navigation, constructional activities A survey that measures the elevation of points on a particular piece of land, and presents them as contour lines on a plotFile Size: KB.