35
GSM19 Series Magnetometers - Version 7
GEM Systems, Inc. Advanced Magnetometers
For more technical information, visit www.gemsys.ca
5.3.4 Understanding the X / Y Positioning System
N
↑
+y
x=-600.00 x=-587.50
x=587.50
x=600.00
W
E
If you walk East from x=-600.00
If you walk West from x=600.00
(or any other point), you must use
(or any other point), you must use
+12.50 x increment and 0 y increment.
-12.50 x increment and 0 y increment.
↓
-y
S
For clarity, in the above diagram
x
-axis is aligned EW, and
y
-axis NS but they could also represent
any other grid.
The x increment is used in a mathematically correct way and also indicates the direction in which
you are walking.
Similar rules apply for walking in y direction.
•
Walking north or east requires a positive increment regardless of where you stand.
•
Walking south or west requires a negative increment.
The x increment must be zero if you walk along y lines.
NOTE:
All the numbers shown above are just examples, the range of numbers which can
be used are: