converting between the 3 latitude and longitude formats

Converting Between the 3 Latitude and Longitude Formats

But… before we talk about Lat/Long… lets talk about Time!

Time… we understand it

• An hour is made up of 60 minutes

• A minute is made up of 60 seconds

• We can do the math!• What do I mean by that?• ……

Time… we understand itImagine you just hit the button of a

stop watch at…

5:45 (and 30 seconds) • 5 hours, 45 minutes, 30 seconds• 5 hours, 45.5 minutes• 5.7583333333333 hours• We can do the math!

(at least roughly for the last one)

Lat/Long calculations are similar!

• There are 360 degrees in a circle (the globe)

• A degree is made up of 60 minutes

• A minute is made up of 60 seconds

• We can do this math too!

Remember…Three Ways To Express Latitude / Longitude

(for the Same Location)

hddd° mm’ ss.s”Degrees-Minutes-Seconds (Decimal Seconds)N 43° 40’ 55.8”, W 116° 17’ 14.1”

hddd° mm.mmm’Degrees-Minutes (Decimal Minutes)N 43° 40.930’, W 116° 17.235’

hddd.ddddd°Degrees (Decimal Degrees)N 43.68216°, W 116.28725°

Lat/Long Format ConversionLat/Long Format Conversion

hddd0 mm’ ss.s”: N 430 40’ 55.8” X W 1160 17’ 14.1”

(55.8” / 60 = .93’)

Do the Math!

hddd0 mm.mmm’: N 430 40.93’ X W 1160 17.235’(40.93’ / 60 = .682160)

hddd.ddddd0 : N 43.682160 X W 116.287250