“as complexity rises, precise
statements lose meaning and
meaningful statements lose
precision.”
Lofti Zadeh
Precision, accuracy and
significance
Not accurate, but precise
Not precise, but accurate
Accurate and precise
Precision Versus Significance
A 1500 kg mass is approaching
your head at 50.2 m/sec..
Watch out!
How to Convert Decimal Degrees (DD) to
Degrees-Minutes-Seconds (DMS)
Example: Converting 42.36824 to Degrees-Minutes-Seconds
1.
The Degrees are simply the numbers to the left of the decimal, so
the degrees would be 42.
2.
To determine the Minutes, multiply the number to the right of the
decimal point by 60 (example: 0.36824 ä 60 = 22.0944)
3.
The Minutes are the numbers to the left of the decimal point (in
this example, 22)
4.
To determine the Seconds, multiply the number to the right of the
decimal point by 60 (example: 0.944 ä 60 = 5.664)
5.
The Seconds are the numbers to the left of the decimal point,
rounded up (in this example, 6)
6.
DD coordinate 42.36824 = 42º 22' 06" in DMS
How to Convert Degrees-Minutes-Seconds
to Decimal Degrees
Example: Converting 42 22 06 to Decimal Degrees
1.
First: Convert the seconds to a fraction.
Since there are 60 seconds in each minute, 42º 22' 06"
can be expressed as 42º 22' 06/60". Convert to 42º
22.10'.
2.
Second: Convert the minutes to a fraction.
Since there are 60 minutes in each degree, 42º 22.10'
can be expressed as 42 22.10/60º. Convert to
42.3683