Conformal map projections preserve local angles and shapes. Among the given options:
Transverse Mercator, Stereographic, and Lambert Conformal Conic are all conformal projections.
However, the Sinusoidal projection is an equal-area projection and not conformal—it preserves area but distorts shapes and angles.
In a map based on the UTM projection, the grid distance is in error with respect to the geodetic distance by about one in four thousand. If the map distance is 3 cm and the map scale is 1:25,000, then the geodetic distance is ___________m (rounded off to 2 decimal places).
In a Survey of India topographic map of scale 1:50,000, the contours are drawn conventionally at intervals of __________ m.
Here are two analogous groups, Group-I and Group-II, that list words in their decreasing order of intensity. Identify the missing word in Group-II.
Abuse \( \rightarrow \) Insult \( \rightarrow \) Ridicule
__________ \( \rightarrow \) Praise \( \rightarrow \) Appreciate
Figure below shows the scatterplot of training pixels of water (w), sand (s), forest (f) and commercial (c) in bands 1 and 2. Pixel ‘A’ having digital number 4 and 6 in band 1 and band 2, respectively, is to be classified using k-nearest neighbor classifier having the value of k equal to 5. The assigned class for the pixel ‘A’ is ____________
The error matrix resulting from randomly selected test pixels for a classified image is given below.
The Producer’s accuracy of class 1 is % (rounded off to 1 decimal place).
Reference Data | |||||
---|---|---|---|---|---|
Class 1 | Class 2 | Class 3 | Class 4 | ||
Classified Data | Class 1 | 320 | 8 | 7 | 3 |
Class 2 | 12 | 270 | 6 | 2 | |
Class 3 | 9 | 6 | 410 | 5 | |
Class 4 | 14 | 2 | 3 | 350 |
The brightness values of four pixels in the input image are shown in the table below. The image is rectified using nearest neighbor intensity interpolation, and the pixel at location (5, 4) in the output image is to be filled with the value from coordinate (5.3, 3.7) in the input image. The brightness value of the pixel at location (5, 4) in the rectified output image is 11. (Answer in integer)
Location of pixels in input image (Row, Column) | Brightness Value |
---|---|
(5, 3) | 9 |
(5, 4) | 11 |
(6, 3) | 14 |
(6, 4) | 12 |
The hue, intensity and saturation values for a pixel are \( H = 0.5 \, {rad} \), \( S = 0.5 \), and \( I = 0.3 \), respectively. If the pixel is converted to RGB color model, then the value of the green pixel would be __________ (rounded off to 2 decimal places).