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## What is alphanumeric grid reference?

alphanumeric grid. [cartography] A grid of numbered rows and lettered columns (or vice versa) superimposed on a map, used to find and identify features. Alphanumeric grids are commonly used as a reference system on local street maps.

### What is an example of an alphanumeric grid?

As an easy example, one could think about battleship; simply match the number at the top to the number on the bottom, then follow the two lines until they meet in a spot. Algebraic chess notation uses an alphanumeric grid to refer to the squares of a chessboard.

#### What is an alphanumeric grid map?

An alphanumeric grid (also known as an atlas grid) is a simple coordinate system on a grid in which each cell (or square) is identified by a combination of a letter and a number. Each letter-number combination allows the map to be subdivided into many little squares (or boxes).

**How do you write a grid reference?**

Grid references

- First, find the four-figure grid reference but leave a space after the first two digits.
- Estimate or measure how many tenths across the grid square your symbol lies.
- Next, estimate how many tenths up the grid square your symbol lies.
- You now have a six figure grid reference.

**What is the difference between area reference and grid reference?**

The area reference gives a general location, while the grid reference provides an accurate location for a place or feature. Eastings are the lines which increase in number towards the east; they are vertical lines.

## What is an alphanumeric code?

Alphanumericals or alphanumeric characters are a combination of alphabetical and numerical characters. More specifically, they are the collection of Latin letters and Arabic digits. An alphanumeric code is an identifier made of alphanumeric characters.

### What’s a 6 figure grid reference?

6-Figure Grid Reference. A 6-figure grid reference contains 6 numbers which gives us an even more precise location inside the box given by the 4-figure number. Inside each box, imagine 10 tick marks along the eastings and 10 tick marks along the northings. These marks are generally not provided on maps.

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