Question

Study the extract of the Survey of India map sheet no: G4357 - Map 2 and answer the following questions (Eastings 24 to 32, Northings 95 to 05):

1. What are the three types of Scales? Which among them is universally used?
2. 1. What do the black curved lines in four figure grid reference 2400 indicate?
   2. How is this feature formed?
3. 1. What is ‘Sheet Rock’?
   2. Give the four-figure grid reference of a ‘Sheet Rock’ in the map extract.
4. Which quarter of the map extract has the lowest average height above mean sea level? Give reason for your answer.
5. 1. Identify two natural features in grid square in 2904.
   2. Identify two man-made features in grid square in 2998.
6. What is the six-figure grid reference of the following:
   1. Δ 307?
   2. Lined Perennial well with a relative depth of 21 metres?
7. Answer with reference to Sarod N.
   1. What is the nature of the river?
   2. What is the white patch inside the river?
8. What is the direction of Jorapura (2498) from Mahudi Nani (2604) and from Dantiwada (2996), respectively?
9. Name any two types of natural vegetation shown on the map extract.
10. 1. Identify the blue line passing through four figure grid reference 2402.
    2. What type of embankment is built across Sipu River to form the reservoir?

Answer 1

1. The three types of scale are:
   Representative fraction, Statement scale orverbal scale and Graphical or Linear scale.Representative fraction is universally used.
2. 1. They indicate broken ground.
   2. Broken ground is formed by erosion during heavy rainfall due to flooding.
3. 1. Sheet rock - Large areas of rock where theoverlying soil layers have been eroded.
   2. The four-figure grid is 2500.
4. South-West quarter
   Reason: The Sipu River runs toward the southwest, with spot heights decreasing from 194 to 168 and contour heights decreasing from 180 to 160.
5. 1. Seasonal stream, sand dunes, brokenground, seasonal river with perennialwater channel
   2. Temporary hut, cart track
6. 1. 307963
   2. 258019
7. 1. Seasonal river
   2. Island in a river or river island
8. Jorapura from Mahudi Moti is South-West.
   Jorapura from Dantiwada is North-West.
9. Open Jungle, Open Scrub and Scattered trees
10. 1. Perennial canal with Aqueducts.
    2. Earthwork embankment