expkain how four figure grid references are used to find places on map
to be able to draw 4 figure grid reference
22
-3
8
There are 4 squares in a 2 x 2 grid.
The disadvantages of four figure grid references are 1 grid reference is 10 2 is 10 3 is 30 and 4 goes to 400..
to be able to draw 4 figure grid reference
The difference is that the 4 figure grid map is used for roughly the place that is located in the map while a 6 figure grid is used to find the exact location on the map. So when there's a need to find the exact location use the 6 figure grid instead of the 4 figure grid map.(:
a 4 figure grid refrence of old harry rock
Because it is much more accurate (long distances) Larger the figures the greater the accuracy- (very accurate)
say the grid reference was 038441 the four grid referecne would be 0344 which is taking of the 3rd and last number
4 squares in a 2 by 2 grid 9 squares in a 3 by 3 grid 16 squares in a 4 by 4 grid 25 squares in a 5 by 5 grid 36 squares in a 6 by 6 grid 49 squares in a 7by 7 grid 64 squares in a 8 by 8 grid 81 squares in a 9 by 9 grid 100 squares in a 10 by 10 grid
There are three varieties of pentagrids. Initial type - 6A7 type (converter). Grid 1 - oscillator grid, Grid 2 - oscillator anode, Grid 3 - screen grid, Grid 4 - signal grid, Grid 5 - screen grid. Development - 6SA7/1R5 type (converter). Grid 1 - oscillator grid, Grid 2 - screen grid, Grid 3 - signal grid, Grid 4 - screen grid, Grid 5 - suppressor grid. Development - 6L7 (mixer). Grid 1 - signal grid, Grid 2 - screen grid, Grid 3 - oscillator injection grid, Grid 4 - screen grid, Grid 5 - suppressor grid.
These are used In grid's. For an example - Grids on A computer - Map's and other. how to use these are VERY Simple. Notice on a map you follow the contor lines's which are the Numbers - Example 1 |_| |_| 2 |_| 3 |@| 4 |_| 5 |_| 6 7 1 2 3 4 5 6 8 9 10 - These numbers are an example, In a map these will go all the way around. Notice the square with the @ symbol in it, the 4 figure grid reference for that is - 43. In normal maps These are in double numbers. like 10. 4-3 - would be 4030, the "4" is the Bottom easting. ( bottom number) that is in that row of squares. and 3 is the HEIGHT. every number like 1-2-3-4-5-6 will Have a row of squares above them. so Tell me the Grid Reference Between 41 ( or 4010) Answer: It is in the "4 " Row, and at the top. of the row. a 6 grid reference Is More presice. these have more numbers than 4- Like 4030 - that cordinate, would have more numbers. Example : ( a 6 figure grid reference is only used to PINPOINT AN exact location of an Object -and the 6 grid reference would be - ( 1 |_| |_| 2 |_| 3 |._| 4 |_| 5 |_| 6 7 1 2 3 4 5 6 8 9 10 I wanna get the location of the Dot It would be "4-7-3-2" - 4 for the coloum, Picture the square from the bottom. was divided into 10' |-|-|-|-|-|-|-|-| you just work how many Lines the Dot is across, which is 7. 4-7. the 3- as the middle row. and the 2 is 2 across. but on the Last 2 numbers. You Work across, on the side go to the LEft or the right side ( left side) and count 10 up from the -->|_| Side notice thr arrow - so it would look like -|- this, this is one side of the square - the left -|- -|- -|- |-|-|-|-|-|-|-|-|-|
MGR4 (Map Grid Reference, 4) Four Grid Reference
As it is 100 times more precise - a place could be anywhere in a big square, but dividing horizontal into 10 smaller lines, and same for vertical, makes 10 x 10 = 100 smaller squares. So aplace can be found more easily.
1.North Grid 2.North - East Grid 3.South Grid 4.West Grid