# What is alphanumeric grid reference?

## 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

1. First, find the four-figure grid reference but leave a space after the first two digits.
2. Estimate or measure how many tenths across the grid square your symbol lies.
3. Next, estimate how many tenths up the grid square your symbol lies.
4. 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.