Point
to Point
To measure the distance between two points accurately, set the wheel
on the beginning point, push the reset button and walk to the end
point. With the handle in the same position as it was when measurement
started, read the distance directly from the counter.
Wall
to Point
To measure the distance between a wall and a point accurately, start
the wheel with the back end against the wall, push the reset button
and walk to the end point. With the handle in the same position as
it was when measurement started, read the distance from the counter
and add the radius of the measuring wheel.
Wall
to Wall
To measure the distance between two walls, start the wheel with the
back end against the wall, push the reset button and walk to the end
wall. With the handle in the same position as it was when measurement
started, read the distance from the counter and add the diameter of
the measuring wheel.
To find the
area multiply the length times the width.
Measure
distance from point A to point B (length)
Measure
distance from point B to point C (width)
To find
area multiply the distance in step 1 by the distance in step 2.
The formula
for finding the area of a triangle is Length x Height ÷2.
Measure
the distance from A to B (length)
Measure
the distance from the base of the triangle to its highest point
(height)
To find
area multiply the distance in step 1 by the distance in step 2.
Divide area
found in step 3 by 2.
An irregularly
shaped field can be divided into a series of squared, rectangles or triangles.
The area can be calculated for each segment. Add area for all segments
to determine total area.
An acre is 43,560
square feet. Using the measurements from figure 1, length times width
= total square feet. Divide total square feet by 43,560 to find acres.
By using the formula
L x W divided by 43,560, acres in any square or rectangular field can
be calculated.
The Meter-Man model
79C Measuring Wheel measures in chains and hundredths of a chain. To
determine the area simply multiply the length times the width and move
the decimal
point one place to the left. No division is necessary.
A contour with parallel
sides can be treated as a rectangle. It is most accurate if the linear
dimension is taken by walking down the middle of the strip. If the
contour
strip is uneven in width, treat the area as a rectangle and a triangle.
Divide total area
by 10,000 to determine hectares. Move decimal point four places to the
left