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Geodetic Services

In 1993 the geodetic control network of Sri Lanka was upgraded by using precise baselines meassured using global positioning system. The transformation parameter were computed from the local datum called Everest 1830 to global datum called WGS84. Hence Global Positioning System receivers can be used to obtain the national grid system centimeter level accuracy.

Issue of Geodetic Information to Licensed Surveyors and Outside the Department

Following type of geodetic information will be issued only from the Geodetic Survey Unit, ISM, Diyatalawa, at the rates given below.

(a) Bench mark information of primary and Secondary level lines. Only the ‘C” type bench mark will be issued unless the      survey is supervised by the dept.
(b) All triangulation points, coordinates and route sketches.
(c) GPS Primary Control points, coordinates and sketches.
(d) First Order traverse control point, coordinates and sketches.
(e) GPS data.

Type of Information Rate (Rs.)
BM height with the diagram 260.00
Coordinates of 1ndorder and 2nd order EDM traverse control points with diagrams 260.00

Coordinates of a GPS primary control point with diagrams


Coordinates of Trigonometrical station with observed bearings and descriptions


Note:- All applicable tax to be added to above rates

Other services are available in Geodetic Survey Unit.
1. Calibration of Total station instrument. Rs 2500 + all applicable tax to be added.
2. Consultancy Services
3.Establishing of (GPS) control points.
4.Precise Levelling.

தகவல் விழிப்பு
Survey Department Of Sri Lanka

Three awards received by the Survey Department in National Productivity Award Competition in 2015.

1.Provincial Surveyor General Office-North Western - 3rd Place

2.Surveyor Generals Office - Special Commendation

3.Institute of Surveying & Mapping - Special Commendation

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