LESSION 3

1. What is understood by the distance between two points in surveying?

The distance between 2 points is understood to maen the horizontal distances.

2. What is horizontal distance reduced to in geodetic surveying?

In geodetic surveying, horizontal distance is reduced to the equivalent at sea level.

3. Why is such reduction unnecessary in plane surveying?

4. What are slope distances reduced to?

They are reduced to there equivalent on the horizontal projection for use in plotting maps, calculating land area, ECT.

5. State some advantages of electronic distance measurement?

6. Describe briefly structure of total station?

Total station instrument combine an EDM instrument, electronic digital theodolite and computer in one unit.

7. Mention some advantages of total station?

Total station instrument simultaneous measure distance, as well as direction, and transmit the results automatically to a build-in computer.