Advance Surveying Sheet 7

The height distorsion on a truly vertical photograph is                                                              

The point vertically below the perspective centre on the ground is called :

The cause of gaps between the photographs is due to :                                                           

The value of geo-centric parallax to be added to the observed altitude of sun is

The elevation of the star at elongation is obtained by                                                                

If $\delta$ is the declination of the star and $\varphi$ is the latitude of the observer, then the azimuth of the star at elongation is given by

If $\delta$ is the declination of the star and $\varphi$ is the latitude of the observer then the hour angle of the star at elongation is given by

A star is said to elongate                                                                                                 

The altitudes of a circumpolar star at culminations are ${70}^0$ and ${10}^0$, both culminations being of zenith.The latitude of the place,is

If a star whose declination is ${60}^0$ N culminates at zenith,its altitude at the lower culmination, is