Graphics from Charlie Leonard (Boise Interagency Dispatch Center, Boise Id.) powerpoint presentation (INTROGPS
Used without permission
10º
20º N
10º N 10º 690 miles
0º N 10º 690 miles
10º S 10º 690 miles
powerpoint presentation (INTROGPS).
10º
690 miles
690 miles
690 miles
Graphics from Charlie Leonard (Boise Interage
Used without permission
10º
240 mi
460 miles
690 miles
120º W
from Charlie Leonard (Boise Interagency Dispatch Center, Boise Id.) powerpoint presentation (INTROGPS).
out permission
10º
240 mi
10º
460 miles
10º
690 miles
0º W 110º W
Cheatsheet for GPS implication of position
WORK IN PROGRESS:
Necessary Conversions Use at your own discretion.
Worksheet: Some interesting conversions and stats.
1 Nautical Mile = 6076.12 feet 6076.12
Enter your Latitude and see what the coordinates
1 Nautical Mile = 1852 meters 1852
imply in terms of "on ground distance"
Formulas and Examples
LATITUDE - No matter where you are on the planet, these distances apply!
One Degree of Latitude = 60 Nautical Mile = 364,567.2 feet = 111,120 meters
One Minute of Latitude = 1 Nautical Mile = 6076.12 feet = 1852 meters
One Second of Latitude = 0.016666 Nautical Miles = 101.27 feet = 30.87meters
LONGITUDE - the "on earth" distance of a unit of Longitude along a parallel depends on the latitude of that parallel
One Degree of Longitude corresponds to 111,120 meters multiplied by the cosine of the latitude For Anchorage at 62 degrees N latitude this corresponds to 111,120*(cos(62)) = 52167.68 meters
One minute of Longitude corresponds to 1852 meters multiplied by the cosine of the latitude For Anchorage at 62 degrees N latitude this corresponds to 1852*(cos(62)) = 869.46 meters
One second of Longitude corresponds to 30.86666 meters multiplied by the cosine of the latitude For Anchorage at 62 degrees N latitude this corresponds to 30.866*(cos(62)) = 14.49 meters
Meters
Therefore a Screen reading on a PLGR carried out to 1 hundredth of a second for Longitude(eg. 149 23 43.33) = 0.13 In East West
Therefore a Screen reading on a PLGR carried out to 1 hundredth of a second for Latitude(eg. 62 23 12.33) = 0.31 In North South
In Meters
A PLGR screen reading out to 7 decimal places(Longitude) = 0.005 In East West
A PLGR screen reading out to 7 decimal places(Latitude) = 0.011 In North South
A GPS screen reading out to 5 decimal places(Longitude) = 0.470 In East West
A GPS screen reading out to 5 decimal places(Latitude) = 1.111 In North South
Enter your Latitude as a Degree here=> 65
Longitude In Meters In Feet Latitude
A degree of Longitude in your area implies=>> 46961.34 154072.65 A degree of Latitude in your area implies=>>
A Minute of Longitude in your area implies=>> 782.69 2567.88 A Minute of Latitude in your area implies=>>
A Second of Longitude in your area implies=>> 13.04 42.80 A Second of Latitude in your area implies=>>
ns and stats.
ordinates
NorthSouth
In Meters In Feet
111120.00 33869.37
1852.00 564.49
30.87 9.41