Survey Training (Revenue Staff)

HIGHER SURVEY TRAINING

Under the supervision and administrative control of the Director of Survey and Land Records the Higher survey training is conducted at the office of the Survey Range Assistant Director, Kozhikode and at Thiruvananthapuram ILDM Office, P.T.P Nagar. The course of study provides facilities to the Officers of the Revenue Department for the acquisition of good knowledge in survey and its procedure in each stage. The course will be a period of two months. The number of candidates admitted for each course will be 40 and the selection will be made by the Land Revenue Commissioner. In making the selection the Revenue Department shall give preference to probationers who are required to undergo the training during the period of their probation, according to their seniority in the respective categories. No tuition fee will be levied from the trainees for their training.
The period of training will be treated as on duty and the trainees will be eligible for all service benefits in accordance with the rules in force. The final examination will be conducted by the Officers authorized by the Survey Director in writing. The maximum marks for theory and practical are 100 each. The names of the successful candidates at the final examination shall be published and Certificates shall be issued to the candidates who succeeded in securing a pass in both the parts. Failed candidates will be allowed to attend the final examination of the subsequent courses without undergoing further training, if they apply. The classes are being conducted at ILDM, Thiruvananthapuram by a Head Surveyor of CSO under the supervision of a Nodal Officer holding the post of survey superintendent. For the smooth running of the above training classes a FGS and a Chainman is required additionally.

Syllabus for Higher Survey

  1. Explanation of instruments used for measuring angles, study of ordinary compass, cardinal directions, magnetic bearings, deviation of the north indicated by compasses, reason for the same. Magnetic pole-Prismatic compasses- Principles to be observed in surveying with compasses in writing field books plotting the bearings with protractor. The incidental errors in plotting with the protractor- Adjustment of errors- The scope and accuracy in compass surveying.
  2. Theodolite:- Its use and accuracy. Explanation of different parts of the instrument with reference to the functions of each part. Temporary and permanent adjustment-Reading horizontal angles from primary and vernier scales.
  3. Explanation of logarithms: – Use of logarithms in mathematical calculations, multiplication, divisions evolution and involution by logarithms.
  4. Practice in observing horizontal angles by theodolite and completing a traverse circuit of 4 to 6 sides. Angular check of a closed circuit and study of the following:-
  5. Computation of deduced bearing and reduced bearing and reduced bearing-Rectangular co-ordinates and spherical coordinates Distance proof of a closed circuit. Allowable limits of errors in angles and distances and adjustment of errors.
  6. Trigonometry:-Trigonometrical ratios in right-angled triangles-Finding the height of inaccessible points.
  7. Explanation of the different columns of a traverse sheet –The significance of each column, working out plotting lines and explanation of plotting. The necessity of double check in every operation of survey in field and office-Working out area columns, map plotting, preparation of squares, plotting chain survey fields within traverse plot.
  8. Observation of vertical angles:- Angles of elevation and depression, calculation of horizontal and vertical distances from observed angles, convergence of meridians.
  9. Solution of triangles:- Triangulation survey- Value of trigonometrical station-Astronomical terms used in survey –Azimuth by Sun’s observation-Main circuit and sub circuit.
  10. Different special types of survey:- Town survey, Railway survey, Village site survey-Limit of errors in town survey.
  11. Other survey instruments generally in use:- Optical- square, sextant, prismatic compass, plane table. The use of the above instruments and the comparative merits of each.
  12. The description of the levelling instrument (not details) its use and its working – explanation of terms-Gradients, contouring, and benchmark.
  13. Surveying with theodolite a circuit of 15 to 25 stations-setting up and computation of closed traverse.
  14. Enquiry and disposal of land complaints.
  15. Harmonizing traverses with values of trigonometrical stations.
  16. Prefixing missing stones in a theodolite traverse measurement of obstructed theodolite line and problems connected therewith, and ranging a true long line.
  17. Reading of topographical maps of the Survey of India-Identification of fields in revenue survey map.
  18. Land records maintenance work-Explanation of different practices and rules-Maintenance of frontier boundary marks-explanation of standing orders relating to maintenance of frontier boundary

CHAIN SURVEY TRAINING

Under the supervision and administrative control of the Director of Survey and Land Records the Chain survey training is conducted at the office of the Survey Range Assistant Director, Thrissur and at Thiruvananthapuram ILDM office, P.T.P Nagar. The course of study provides facilities to the Officers of the Revenue Department for the acquisition of good knowledge in survey and its procedure in each stage. The course will be a period of one month. The number of candidates admitted for each course will be 40 and the selection will be made by the Land Revenue Commissioner. In making the selection the Revenue Department shall give preference to probationers who are required to undergo the training during the period of their probation, according to their seniority in the respective categories. No tuition fee will be levied from the trainees for their training. The period of training will be treated as on duty and the trainees will be eligible for all service benefits in accordance with the rules in force. The final examination will be conducted by the Officers authorized by the Survey Director in writing. The maximum marks for theory and practical are 100 each. The names of the successful candidates at the final examination shall be published and Certificates shall be issued to the candidates who succeeded in securing a pass in both the parts. Failed candidates will be allowed to attend the final examination of the subsequent courses without undergoing further training, if they apply. The classes are being conducted at ILDM, Thiruvananthapuram by a First Grade Surveyor of Attingal under the supervision of a Nodal Officer holding the post of survey superintendent.

The syllabus of the Chain Survey course

  1. Simple proportion, squares of numbers, square roots, Decimals, properties of    triangles and quadrilaterals, Circles, radius and diameter.
  2. Area of geometrical figures, triangles and quadrilaterals and irregular fields.
  3. Construction of scales- simple, diagonal and vernier.
  4. Field work:-
    1. Construction and use of the equipment in Chain Survey, such as chain, cross-staff, offset poles
    2. Testing the accuracy of the chain and cross-staff.
  5. Ascertaining correct results with the aid of incorrect chain and cross-staff. Measurement of lines. Recording of measurements. Measurements along slopping ground by stepping. Obstructed lines both invisible and inaccessible. Surveying small fields and preparation of sketches.
  6. Construction of different area square-papers and converting the area computed by different area square-papers and computing scales from plot on different scales.
  7. Ascertaining measurements of lines obstructed by tank-bed, prickly pear, houses, etc., by constructing rectangles, right angles, triangles, trapezoids, similar triangles with chain only and similar triangles within right-angled triangles.
  8. Finding measurements between points on opposite banks of an unaffordable river from one bank by constructing equal right-angled triangles and similar triangles.
  9. Fixing the length of a line between two points on the banks of an unaffordable river from the other bank by constructing equal right angled triangles. Measurements of offsets on the obstructed lines and also of obstructed offset lines.
  10. Calculation of chain and offset lines on an obstructed line from those measured from another line. Measurement of fields containing two town subdivisions in them.
  11. Measurement of narrow fields both in the triangle and offset system and also in the base line system and the advantage of the latter over the former method.
  12. Preparation of eye-sketches:- Sketches in the rough note-book and also recording of important features and topographical details seen in the field in the rough notebook
  13. Explanation of methods for fixing the missing survey marks on the survey boundaries, creating new subdivisions within surveyed blocks to the given areas.
  14. Survey of a block of 40 acres of land containing several survey fields each field containing a number of subdivisions, running of purtal lines and offsetting of all the nearest junction points.
  15. Plotting of survey-fields to prescribed scales and preparation of plotted sketches, preparation of demarcation sketches on scale 1/2000 and map on scale 1/5000 with the aid of the purtal lines and offsets records and also plotted sketches of the survey fields.
  16. Finding area with area square paper and computing scales both from the plotted sketches and from the group sketch.
  17. Comparison of area as per the above two results and adjustments.
  18. Explanations of the several provisions of the Kerala Survey and Boundaries Act, 1961 (act 37 of 1961), the L.R.M. rules and also the duties of various officers under the rules. Explanation on the different methods of survey such as Khasra, Base line and offset system, Tak system and triangles and offset system. Explanation of the correction of measurements in the records where errors are recovered