When using the ocad measure tool there is a listing for both azimuth and gradian...what's the difference? Is the azimuth the actual degree reading? ...talking about a straight line.
The first number is the normal degrees you are used to, ie, out of 360 degrees. Gradians are 400 divisions per circle. If you check and n/s or e/w line it's probably easiest to see, for example:
180 degrees, and then 200 gradians.
Anyone who has worked seriously on implementing trig functions in a modern cpu, in either hw or sw, knows that the only correct angle measurement is fraction of circles, i.e. either [0-1> for a full circle, or you can also use half-circles, so that [0-2> is a full circle.
BTW, all Garmin GPSs calculate angles as a 32-bit fixed-point value, i.e. 0:32 format.