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Old 05-25-2010, 03:20 AM   #1
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Default question about GPS

This may be a dumb question, but I am going to ask any way.

I was just given a hand held gps, so I am testing it out. Well I marked my house and walked way down the road, found my way home lol, before I got all the way home it beeped to let me know I was close, all is well I made it home.

So I then look at the cords. it gave me, then I went on google earth and typed in my address.

This is what google earth gave me

N30.33 50.09

w87.15 26.52

This is what the GPS gave me

N30.33.840

W87.15.450

Why are the last sets of numbers different? As in N30.33 50.09 compaired to N30.33.840???

I want to make sure I have a good understanding before I try to find a spot and get frustrated wasting a lot of time.

If you have any suggestions, please let me know. It would be much appreciated!

Thanks

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Old 05-25-2010, 03:36 AM   #2
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Default RE: question about GPS

<a href="http://www.google.com/search?hl=en&amp;source=hp&amp;q=understanding+gps +coordinates&amp;aq=0&amp;aqi=g9g-s1&amp;aql=&amp;oq=understanding+gp&amp;gs_rfai">h ttp://www.google.com/search?hl=en&amp;source=hp&amp;q=understanding+gps +coordinates&amp;aq=0&amp;aqi=g9g-s1&amp;aql=&amp;oq=understanding+gp&amp;gs_rfai</a>=

Here is some reading for ya...........
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Old 05-25-2010, 03:41 AM   #3
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Default RE: question about GPS

I would say your Gps is probablly right. I'm sure Google earth is done with some type of overlay and could be off that far. When you start to launch just ask someone else who is at the dock for there coords. at the current location and compare. I bet there real close.
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Old 05-25-2010, 04:46 AM   #4
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Default RE: question about GPS

That article is great, explains it to the T. GREAT INFO FOR ANYONE THAT IS NEW TO GPS.

Thanks, now I need to polish up on my math lol!
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Old 05-25-2010, 11:46 AM   #5
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Default RE: question about GPS

Quote:
lighttackle2fun (25/05/2010)That article is great, explains it to the T. GREAT INFO FOR ANYONE THAT IS NEW TO GPS.

Thanks, now I need to polish up on my math lol!
You don't have to polish up on your math just get the GPS converter and put the numbers into it.

http://boulter.com/gps/
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Old 05-25-2010, 05:11 PM   #6
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Default RE: question about GPS

Quote:
sealark (25/05/2010)
Quote:
lighttackle2fun (25/05/2010)That article is great, explains it to the T. GREAT INFO FOR ANYONE THAT IS NEW TO GPS.

Thanks, now I need to polish up on my math lol!
You don't have to polish up on your math just get the GPS converter and put the numbers into it.

<a href="http://boulter.com/gps/">http://boulter.com/gps/</a>
The link is giving me this error

Not Found</h1>The requested URL /gps/ was not found on this server.

could you check the link and repost, I would REALLY like to check that GPS converter out. Thanks
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Old 05-25-2010, 08:25 PM   #7
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Default RE: question about GPS

The first set of numbers from Google Earth is displaying the Latitude and Longitude as Degree, Minutes and Seconds and reads as follows: 30 degrees, 33 minutes, 50.09 seconds North by 87 degress, 15 minutes, 26.52 seconds West.

Your GPS set of numbers is displaying the Latitude and Longitude as Degrees and Decimal Minutes and reads as follows: 33 Degress and 33.840 minutes North by 87 Degrees and 15.450 minutes West.

60 seconds = 1 minute
60 minutes = 1 degree

To get a decimal minute divide seconds value by 60 and add it to the minutes value and if you divide that number by 60 again and add it to the degree you get a decimal degree reading.

Clear as mud?


You can change Google Earth to display same as your GPS is displaying by selecting -&gt; Tools -&gt; Options. Under the first Tab (3D View) in the middle left side you will see a box called "Show Lat/Long" if you select Degrees, Decimal Minutes and Click OK. The coordinates in Google Earth will match your GPS readings.

[img]file:///C:/Users/JEFFOR%7E1/AppData/Local/Temp/moz-screenshot-1.png[/img]
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Old 05-27-2010, 04:49 AM   #8
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Default RE: question about GPS

You can probably change the GPS to read the same as Google earth in the setup menu. I changed my magellan sportrak to decimal and it's pretty old.
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