Area Measurement made easier
with GPS
Many Garmin GPS have a
special area measurement function. Simply walk, ride, drive or
fly around the perimeter,
and press a button. Simple. You can use it on land or water. When
you purchase a Garmin GPS for this purpose, we also supply special
instructions for this and other rural, land and aquatic operations.
Ph 1800 666477. 
Mathematical
considerations of area measurement.
Quarry and extractive industries
In assessment of possible mineral or gravel
deposits, a Garmin GPS could be most useful. And when extraction
is underway, you can keep a pretty reliable record of what
work has been done over a period. At a low level of accuracy,
volumes can be calculated to assist in planning, finances and
projections. Ask
for special instructions from Johnny Appleseed GPS.
Water bodies, dams and lakes
You can measure volumes of water by
using the area and the average depth. By subtracting
the water area from the total paddock area, you can
also get the arable or grazing area. Water may also
be used for valuation purposes. Ask
for special instructions from Johnny Appleseed GPS.
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Crops, tillage, and unimproved
land
There are always important consideration
for crops. Valuations for financial management, assessment
of risk, and documentation of crop damage (pest, weather
or fire) are made simpler and more reliable with an
area capable Garmin GPS. Ask
for special instructions from Johnny Appleseed GPS.
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Creeks and watercourses
Sometimes
it is important to understand how much land there is between
the highest flood banks of a watercourse. This may be used
for valuation purposes, or assist in planning how much
arable land you have in the balance of a paddock. Ask
for special instructions from Johnny Appleseed GPS.
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Pastures and range country
Actual land area is measured, not the
area projected to a plane surface. So the whole slope
is calculated. In steep country, this can make quite
a difference. Sometimes it is more practical to traverse
small sections, and then add them together. Or even
do a large area, then subtract a smaller measured section.
Ask for special instructions from Johnny Appleseed
GPS.
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Mathematical
Considerations
It is not possible for us to claim a particular
accuracy for area measurements using a Garmin GPS. As you know,
Garmin GPS (and the civilian GPS system accuracy) is 15 metres.
In the space of half an hour, what you lose on the roundabout,
you'll gain on the merry-go-round. So area measurements can be
surprisingly accurate. We can advise on methods of test, and
ways to satisfy yourself about the results you are getting. To
purchase an area capable Garmin GPS, simply phone 1800 666477. |
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Johnny Appleseed GPS