1. Book -1
Std -10

2. Relative Location Absolute Location Location expressed using landmarks
Behind Big Bazaar
Opposite Shiv Temple
Near Patel Pan
Absolute Location
Location expressed using known
grid system
19° N; 78° E

3. Latitudes and longitudes
Eastings and Northings

5. Value increases towards east Value increases towards north
Eastings
Northings
Vertical Lines
Horizontal Lines
North to South
East to West
Numbered 00 to 99
Placed 2 cm (1 km) apart
Value increases towards east
Value increases towards north

6. Eastings and Northings Latitudes and Longitudes
Parallel and Equidistant
Longitudes not Parallel and equidistant
Distance between successive eastings or northings is
2 cm
Distance between two degrees of latitude may be as large as 222 cm
Conclusion
Both grid systems do not overlap
System of Eastings and Northings is more accurate
System of Eastings and Northings is simpler

8. First two digits are eastings
Next two digits are northings
By convention, lesser value is always taken

9. PAMERA
MALGAON
1520
GULABGANJ
1820 OR 1920
Eastings
Northings 1 6 2

10. First two digits are eastings
3rd digit is the 10th division of eastings
Next two digits are northings
6th digit is the 10th division of northings
Eastings
10th division of eastings
Northings
10th division of northings 1 6 5 2 7

11. EXPRESSING THE LOCATION AS A SIX FIGURE GRID REFERENCE25 26
4 figure grid reference
is 2577
Six figure grid reference of temple is 1 2 3 4 5 6 7 8 9 78 2 5 7 3 1 77

12. 4 figure grid reference
6 figure grid reference

13. EXPRESSING THE LOCATION AS A SIX FIGURE GRID REFERENCE25 77 78 26
4 figure grid reference
is 2577
Six figure grid reference
A –
B –

14. x y 6 figure reference of G is x = a / 2 y = b / 2
Truncate the decimals
If a = 13 mm; b = 11 mm
6 figure grid reference is
256775 25 77 78 26 2 5 x 7 y
20 mm G a b

15. Start working on the assignment sheet
Guided practice
Start working on the assignment sheet

16. End of Presenattion