1.5 A grid network

Geography

Grade 4

Map work

Module 6

A grid network

• To indicate the location of a specific place or characteristic is much easier if there is a grid network. These are lines drawn on the map, which divide the map into small squares. At the top of the map, each square is then numbered 1, 2, 3, and so on. In the left and/or right margins, you find the letters A, B, C, etc.

We then use these letters and numbers to give each square a name.

Example:

	1	2	3
A				A
B				B
C				C
	3	2	3

If now you want to indicate where the aeroplane is, we say it is in block B2 .

Activity 1

To indicate location by means of a grid network [lo 1.3, 1.4]

Indicate the location of the following objects as they appear in the example:

1. man …………………………………………………………………………………

2. tree …………………………………………………………………………………

3. dog ………………………………………………………………………………….

4. house ………………………………………………………………………………

Study this grid:

Now study the following coded message that has been written according to the grid network code and decipher it. A semi-colon (;) indicates the end of a word.

D4; A5 D4 D5 A1; D4 A2; D1 E5 B5 A1; B4 D3 C1 A2; C1 E1 A1 A3 A1; C5 D3; D2 D3 B2; A5 D4 D5 A1

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Now write your own secret message by using the grid network code. Swap your secret message with a classmate and decipher each other’s messages.

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Assessment

Learning outcome 1: geographical enquiry

The learner will be able to use enquiry skills to investigate geographical and

environmental concepts and processes.

Assessment standard

We know this when the learner:

1.3 identifies symbols used in different kinds of maps (including plan view, grids and map keys) [works with sources].

1.4 locates places using a simple grid referencing system and directions [works with sources].

Memorandum

1. C3
2. A3
3. B3
4. B1