How do you write an OS grid reference?
- Start at the left-hand side of the map and go east until you get to the bottom-left-hand corner of the square you want. Write this number down.
- Move north until you get to the bottom-left corner of the square you want.
What is the difference between 4 and 6 figure grid references?
four-figure grid reference, such as ’19 45′, indicates a 1 km by 1 km square on the map; and. six-figure grid reference, such as ‘192 454’, indicates a 100 m by 100 m square on the map.
How accurate is a 8 figure grid reference?
What is the accuracy of an 8 figure grid reference? An 8 figure grid reference will cover an area of 10m by 10m i.e. 100 square meters, the equivalent of less that a quarter of Wimbledon’s centre tennis court.
What’s a 6 figure grid reference?
National Grid reference numbers There are two main types of grid reference: four-figure grid reference, such as ’19 45′, indicates a 1 km by 1 km square on the map; and. six-figure grid reference, such as ‘192 454’, indicates a 100 m by 100 m square on the map.
How many digits make up a grid reference?
A GPS unit commonly gives a ten-digit grid reference, based on two groups of five numbers for the Easting and Northing values. Each successive increase in precision (from 6 digit to 8 digit to 10 digit) pinpoints the location more precisely by a factor of 10.
What is 8 digit grid reference?
In order to obtain an 8 figure grid reference, you need to carry out the exact same procedure to obtain a 6 figure grid reference, dividing your grid square into tenths, but then further sub-divide the 6 figure tenth in which your location lies into further tenths (the 8 figure tenths).
What is a 4 grid reference?
A 4-figure grid reference contains 4 numbers. For example, you might be given the number 3422. The first two numbers are called the easting, which is the number you would look for at the bottom of the map. Your grandfather gives you the 4-figure grid reference 1331.