Coordinates conversions

There doesn't seem to be a standard on how the gps coordinates are given when i consult the guides and internet
some
36° 5' N 115° 10' W

some
N42 09.762 W78 17.779

How do i convert to the standard
-xx.xxxxx,xx.xxxx that i use to create my POI files
Is there a software that can help me

Thanks

Extra POI Editor

 I use the Extra POI Editor. It uses Google to find the location then you just press the Grab button to capture the coordinates and save them to your file. I always use Google Street View to confirm the exact location.
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Rich Nuvi 255W, 2597LMT

You can try here

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Nüvi 255WT with nüMaps Lifetime North America born on 602117815 / Nüvi 3597LMTHD born on 805972514 / I love Friday’s except when I’m on holidays ~ canuk

Doesn'work how would you go

 Doesn'work how would you go about converting N42 09.762 W78 17.779 or 36° 5' N 115° 10' W that i have in a guide

 camping rivopom wrote: Doesn'work how would you go about converting N42 09.762 W78 17.779 or 36° 5' N 115° 10' W that i have in a guide There are numerous conversion programs available on the internet. Some are down loadable and others can be used right on the internet.
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Nuvi 2460LMT.

you can use a simple calculator

 camping rivopom wrote: …. how would you go about converting N42 09.762 W78 17.779 or 36° 5' N 115° 10' W that i have in a guide You could do it with a simple calculator: You have it in the form degrees and fractional minutes. Divide the minutes by 60 and add to the degrees. Example: 9.762 divided by 60 is .1627 Add to 42 and you have N42.1627 And 5 minutes divided by 60 is .0833 Add that to the 36 degrees and you have 36.0833N which is the same as N36.0833

Thanks Evert for the

 Thanks Evert for the explanation helps to understand canuk gave me a site which helps in the conversion Thanks canuck

Try here

 Sorry, didn't understand what you wanted. Thought you were just creating csv files. Sounds like you have coordinates in a book or magazine you want to be able to enter into a csv file. Try this site, pretty straightforward http://boulter.com/gps/
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Rich Nuvi 255W, 2597LMT

FizzyCalc

 Google for fizzycalc, it's free and it doesn't have to be installed. You enter a coordinate in any format and it will give you all possible conversions. If you do have trouble finding it, let me know and I'll zip the exe and send it to you.
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Anytime you have a 50-50 chance of getting something right, there's a 90% probability you'll get it wrong.

GPS Sway

 I use a program called GPS Sway. You can get it here: http://www.gpsfiledepot.com/tools/gpssway.php