Maps

*These maps are centered on active runways instead of roads.  Do not enter an active runway.

**Coordinates generated by GPS Visualizer's Quick Geocoder

°  = Degrees
' = Minutes
" = Seconds
+ values indicate Northern or Eastern Hemisphere
- values indicate Southern or Western Hemisphere

To convert decimal minutes to Minutes and Seconds

Example: N29° 41.3439', W095° 10.1564' (La Marque Armory)

1. We only need to work with the numbers to the right of the decimals in the minute field.  The degrees and whole number minutes are still valid.  For the longitude, N29° 41' is good.  We will be converting .3439' to seconds.

2. Multiply .3439 times 60 to arrive at seconds. 
.3439' x 60 = 20.634" which rounds to 21" if your GPS unit does not accept decimals.  So the longitude in degrees, minutes, and seconds is N29° 41' 21"

3. Then do the same for the latitude. 
.1564' x 60 =  09.384" which rounds down to 09" if your GPS unit does not accept decimals.  So the latitude in degrees, minutes, and seconds is W095° 10' 09".  It is always a good idea to precede single digit numbers with leading zeroes in order to minimize errors.

4. The completed coordinates for this location in degrees, minutes, and seconds is N29° 41' 21", W095° 10' 09".

To convert decimal degrees to Degrees Minutes Seconds

Example: 29.36341, -94.98848 (La Marque Armory)

1. We'll begin with the order.  Longitude is listed first.  Latitude is listed second. 

2. Positive longitude values are in the Northern Hemisphere.  Negative longitude values are in the Southern Hemisphere.  North American longitudes are positive (N for North).

3. Positive latitude values are in the Eastern Hemisphere.  Negative values are in the Western Hemisphere. North American latitudes are negative (W for West).

4. The whole numbers are valid as degrees. So the longitude is 29°.  N29°, that is. 

5. To determine minutes, we multiply the decimal remainder by 60. 
.36341° x 60 = 21.8046'
If your GPS accepts decimal minutes then you're done.

6. if your GPS requires seconds, then we'll need to multiply the decimal remainder of the minutes by 60 to arrive at seconds. 
.8046' x 60 = 48.276" - or you can round it to 48 if your machine requires it.

7. So the Longitude is one of the following (depending on the requirements of your machine):
N29° 21.8046'
N29° 21' 48.276"
N29° 21' 48" (rounded)

Repeating the process for the Latitude

1. The value (-94.98848) is negative so we're in the Western Hemisphere (W).  And we know the degrees from the whole number.  So we begin with W94°.

2. Multiplying the decimal remainder by 60 gives us our minutes. 
.98848° x 60 = 59.3088'

3. If you need seconds, multiply the decimal remainder by 60.
.3088' x 60 = 18.528"

4. So the Latitude is one of the following (depending on the requirements of your machine):
W94° 59.3088'
W94° 59' 18.528"
W94° 59' 19" (rounded)

5. So the completed coordinates are as follows (depending on the requirements of your machine):
N29° 21.8046', W94° 59.3088'
N29° 21' 48.276", W94° 59' 18.528"
N29° 21' 48", W94° 59' 19"

Just to be thorough, I'll also cover converting Minutes and Seconds to decimal degrees.

To convert minutes and seconds to decimal degrees you simply need to begin at your smallest unit (seconds first, then minutes) and divide by 60 until you arrive at the decimal value of the next highest unit.

Example: N29° 21' 48.276", W94° 59' 18.528" (La Marque Armory)

1. Starting with longitude, divide 48.276" by 60 to arrive at .8046' which you add to the 21' to arrive at 21.8046'.

2. To convert 21.8046' to decimal degrees, divide it by 60 to arrive at .36341° which you then add to the N29° to arrive at N29.36341° which can be simplified to 29.36341.  Positive longitude values are in the Northern Hemisphere.  Negative longitude values are in the Southern Hemisphere.  North American longitudes are positive (N for North).

3. Continuing with latitude, divide 18.528" by 60 to arrive at .3088'.  Added to the 59' we get 59.3088'.

4. To convert 59.3088' to decimal degrees, divide it by 60 to arrive at .98848°.  Adding it to W94°, we get W94.98848° which can be simplified to -94.98848. Positive latitude values are in the Eastern Hemisphere.  Negative values are in the Western Hemisphere. North American latitudes are negative (W for West).

5. So our new coordinates are 29.36341, -94.98848

-2LT Berlin