Explain four - grid reference
Answers
Answer:
Grid references define locations in maps using Cartesian coordinates. Grid lines on maps define the coordinate system, and are numbered to provide a unique reference to each location on the map. This reference is normally based on projected eastings and northings.
Grid systems vary, but the most common is a square grid with grid lines intersecting each other at right angles and numbered sequentially from the origin at the bottom left of the map. The grid numbers on the east-west (horizontal) axis are called Eastings, and the grid numbers on the north-south (vertical) axis are called Northings.
Numerical grid references consist of an even number of digits. Eastings are written before Northings. Thus in a 6 digit grid reference 123456, the Easting component is 123 and the Northing component is 456, i.e. if the smallest unit is 100 metres, it refers to a point 12.3 km east and 45.6 km north from the origin..
Answer:
Grid Reference:-
A grid is a set of lines used to find the exact location of places on a map.
- A national grid reference is a system of rectangular co-ordinates.
- The origin of the grid reference lies at a point in the South-West corner of the map.
- Vertical lines are called Eastings as they are numbered from West to East.
- Horizontal lines are called Northings as they are numbered from South to North.
Explanation: