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methods of plane table surveying
This document summarizes plane table surveying methods. It describes how to set up a plane table over a station by fixing it to a tripod stand and leveling it. It also covers marking the north line, orientation, and common plane table surveying methods like radiation, intersection, traversing, and resection. The radiation method requires a single station while intersection uses a minimum of two stations with orientation done via backsight. Traversing connects multiple stations like compass traversing. Resection orients the table by plotting the station occupied on the sheet rather than other stations or details.
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Overview of a presentation on Plane Table Surveying. Presented by Umer Gulzar and Ghazanfar Ali Maher under Engr. Ahsan Rehman Khan.
An outline slide indicating the structure of the presentation.
Step-by-step procedure for setting up a plane table over a station, including fixing and leveling.
Details on how to center the table using a U-fork and plumb bob.
Instructions for marking the north line using a trough compass.
Guidance on the orientation process at each station, including methods like back sighting for reliability.
Overview of the four main methods of plane tabling: Radiation, Intersection, Traversing, and Resection.
Details on the radiation method, focusing on setting the table at a single station for surveying.
Description of the intersection method, requiring setup at two stations and orientation through back sighting.
Explanation of the traversing method for surveying, connecting multiple stations similarly to compass traversing.
Insights into the resection method for orienting the table, focusing on plotting the station occupied by the table.
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methods of plane table surveying
- 1. Plane table Surveying UMERGULZAR GHAZANFAR ALI MAHER A Presentation on Presented By: Under the guidance of : Engr.Ahsan Rehman Khan Department of Civil Engineering nTechnology NFC IET MULTAN UNiversity Roll No. 2k17-civil-37
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- 3. PROCEDURE OF SETTINGUP A PLANETABLE OVER A STATION : Fixing the table on the tripod stand : LevellingTheTable : With the help of spirit level at different corners.The bubble is brought to the Centre By adjusting the legs.
- 4. Centring the table: With the help of U-Fork and Plumb Bob .
- 5. Marking the NorthLine : The trough compass is placed on the right-hand top corner with its north end approximately Towards the north .Then the compassis turned clockwise or anticlockwise so that the needle Coincides exactly with the 0-0 mark.
- 6. Orientation: During plane tablesurveying the orientation must be performed at every successive station It may be done by a magnetic needle or by backsighting method.The backsighting process is always Preferred,because it is reliable.
- 7. METHODS OF PLANETABLING: The following are the methods of plane tabling : Radiation Intersection Traversing Resection
- 8. Radiation Method : Itrequires the plane table to occupy a single station. •Orientation table is not required. •To conduct the survey of an area , the table is kept at a Convenient station P commanding a full view of the area to be surveyed.
- 10. Intersection Method : •Thismethod requires setting the table up at minimum Of two stations. • Orientation is essential and be can done by back Sighting. •Two station A and B are selected so that they Command a full view of the area to be surveyed.
- 12. Traversing Method : Thismethod is used to connect the two or more Stations , however it is similar to the compass traversing But are done simultaneously. Traversing is a method of surveying where by a series Of lines are surveyed Traverse may be open or closed one.
- 14. Re-section Method : Thisis the method of orienting the table . A characteristics feature of resection is that The object is to plot the station occupied by the table on the sheet rayher than obtaining The other stations or plotting details . Two method of orienting the table Method of back sighting Method using trough compass