Advanced Surveying - Section 1 (4)

Pick up the correct statement from the following. The difference between the longitudes of the places is obtained.

The relief displacement of a minar 72 m high on photograph is 7.2 mm and its top appears 10 cm away from principal point. The flying height of the camera, is

The station which is selected close to the main triangulation station, to avoid intervening obstruction, is not known as

If the general ground level of any area is 10% of the flying height, the principal points may be used as the centres of radial directions for small scale mapping even in tilted photograph up to

The scale of a vertical photograph of focal length f taken from height of H metres above M.S.L., at a point of reduced level h, is

The difference in longitude of two places expressed in time is equal to the difference in their

The relation between the air base (B), photographic base (b), flying height (H) and the focal length (f) of a vertical photograph, is

Places having same latitude