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AREA AND GRID REFERENCING

AREA AND GRID REFERENCING. Grid lines. Grid lines on a map allow us to locate places. On a topographic map, vertical lines are called eastings . The horizontal lines are called northings . You can remember this by: CRAWL BEFORE YOU CLIMB!. AREA REFERENCE.

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AREA AND GRID REFERENCING

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  1. AREA AND GRID REFERENCING

  2. Grid lines • Grid lines on a map allow us to locate places. • On a topographic map, vertical lines are called eastings. • The horizontal lines are called northings. • You can remember this by: CRAWL BEFORE YOU CLIMB!

  3. AREA REFERENCE

  4. LEN – A * AT AR3380, A ? AT AR3177, A  AT AR3480, A @ AT AR7832, A $ AT AR 3280

  5. GRID REFERENCES • Grid References allow us to find a specific point on a topographic map. They contain six (6) digits. The first three digits refer to the easting while the second three digits refer to the northing. Grid References start with a GR. • Example: GR353567 • What is the extra number?

  6. What are the first two digits called? • What are the 4th and 5th digits called?

  7. The remaining digits are the TENTHS

  8. Breaking it down

  9. tenths • To work out the tenths, you need to divide each grid square into ten equal parts.

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