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Teacher_Book - General - Draft 23 - 2015

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ACTIVITY 12<br />

AREA & GRID REFERENCING & DIRECTION<br />

PART D: How humans are interacting positively<br />

with this environment<br />

Watch the IAPF School Video Blog 11<br />

AREA AND GRID REFERENCING SKILL (and a 16-point-compass)<br />

INTRODUCTION: Area Referencing is an important and useful geographical concept used by game rangers to inform their peers of their<br />

location or spoor found in the savanna. It is abbreviated as AR and consists of FOUR (4) digits (eg AR 0319). There is a general rule when<br />

calculating AR coordinates from a map: the first set of numbers in the coordinate are the Eastings, the second set are the Northings. However,<br />

AR coordinates are not very helpful, they only get rangers to within a hundred meters squared of a location which puts rangers in danger,<br />

maybe someone has been injured and need assistance to evac out, maybe a wire snare or evidence has been located and needs an ambush<br />

and / or police for a crime scene. Given a savanna is full of vegetation, it makes it very difficult to quickly locate an object across a few hundred<br />

metres.<br />

Hence, Grid Referencing is better. Grid Referencing is abbreviated as GR and has SIX (6) digits (up to TEN 10 digits with a GPS) (eg GR037197).<br />

These coordinates get a ranger to within a few meters of their target which is much more accurate and efficient. Again, the general rule when<br />

calculating GR coordinates from a map: the first set of numbers in the coordinate are the Eastings, plus ONE MINOR NUMBER; the second<br />

set of coordinates are the Northings, plus ONE MINOR NUMBER. The minor numbers are calculated by dividing a box up into 10 equal parts.<br />

Attempt the samples below.<br />

EASTINGS<br />

EASTINGS<br />

7<br />

12 3 45 6 8<br />

12 3 45 6 789<br />

NORTHINGS NORTHINGS<br />

AR 0216<br />

GR 027164<br />

AR 0318<br />

GR 031189<br />

AR 0319<br />

GR 037197<br />

WNW<br />

W<br />

WSW<br />

NNW<br />

NW<br />

SW<br />

AR 0516<br />

GR050163<br />

N<br />

NNE<br />

NE<br />

E<br />

SE<br />

SSW SSE<br />

S<br />

THIS IS CALLED<br />

A 16-POINT-<br />

COMPASS<br />

ENE<br />

ESE<br />

Page 43

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