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Question
The area is measured by grid square method?
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Solution
To find the area by the grid square method: The grid square on toposheet measures 2 cm × 2 cm., or 1 km., × 1 km., since 2 cm., is equal to 1 km. Therefore, the area of each square is 1 sq. km. To find particular area on a topographical map:
No .of. complete squares : 4 = 4.0 sq.km
No.of 1/2 squares : 2 = 1.0 sq. km
No.of 2/3 squares : 5 = 3.3 sq.km
No.of 1/3 squares : 4 = 1.3 sq .km
__9.6 sq.km. ___
Note the number of complete grid square within the area and the number of squares lying within the area are not complete.
(i) Square covered half are taken as 1 /2 squares.
(ii) Square covered more than half are taken as 2/3 squares.
(iii) Square covered less than half are taken as 1/3 squares.
Add all the squares thus, the area which has to be found out is calculated.
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What is a Watershed?
The distance is measured on the topographic map. There are two methods of measuring distance on the toposheets,
(i) Direct-method,
(ii) Indirect method.
Measuring straight distance is a direct method and measuring through a winding course is an indirect method. Explain both the methods.
What is Concave Slope and Convex Slope? Explain?
Study the extract for topographical sheet 63K/12 shown in the figure below and answer the following questions.
- Give the height of the highest point on the map.
- River Jamtihwa Nadi is flowing through which quarter of the map?
- Which is the major settlement located in the east of the Kuardari Nala?
- What type of settlement does the area have?
- Name the geographical feature represented by white patches in the middle of Sipu Nadi.
- Name the two types of vegetation shown on part of the topographical sheet.
- What is the direction of the flow of the Kuardari?
- In which part of the sheet area is Lower Khajuri Dam located?
R. F. 1: 50,000
Part of the Topographical Sheet No 63K/12
Identify the survey sheet of your city. Make a list of the important features both man-made and natural.
