List of top Geo Informatics Engineering Questions asked in GATE Geomatics Engineering

The spectral reflectance curves of three materials (A, B, and C) are shown, along with three wavelength bands X, Y, Z. Which of the following statement(s) is/are CORRECT?

As shown in the following figure, let $d_1, d_2, d_3$ denote three uncorrelated clockwise directions, observed at point $P$ with equal standard errors for each direction, i.e., $\sigma_{d_1} = \sigma_{d_2} = \sigma_{d_3} = \pm \sqrt{2}''$. Let $\alpha_1$ and $\alpha_2$ be two included angles formed by these three directions. The covariance matrix (in arcsecond$^2$) for these included angles will be given as: 
 

Here, the covariance matrix would typically be presented in a LaTeX format, but for now we are using a placeholder.

In the following figure, A and B are fixed points with known plane rectangular coordinates. C and D are the new points in the control survey whose coordinates are to be determined. For this network, the surveyor has measured all 8 internal angles (1 to 8) and 5 sides BC, CD, DA, AC and BD. The value of redundancy (r) for the given figure will be equal to ................. (In integer). 

To visually distinguish between a river channel and a canal on an image, having similar widths and located in the same area, the most important parameter used is _______________

In active remote sensing of Earth objects from a satellite-borne sensor, the source of the energy used for sensing, lies at the _____________