GPS Co-ordinates
Submitted: Tuesday, Jul 24, 2007 at 21:05
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Col88
I know this has probably been asked before, but please humour me.
Alot of the GPS co-ordinates I find are in decimal degress (141.153481) and my GPS uses degree minutes seconds, which is fine because there are plenty of converters out there.
My question is, my GPS gives it like this - E141degrees 09minutes 12.0 seconds but none of the converters show a decimal of the seconds - just 12 seconds. I know this difference is tiny, but am I reading this right.
Thanks for any help.
Col
Reply By: Richard Kovac - Tuesday, Jul 24, 2007 at 21:09
Tuesday, Jul 24, 2007 at 21:09
col
check out this site by AdrianLR (VIC)
post 47992
Site Link
or may be do a search
AnswerID:
254298
Follow Up By: Col88 - Tuesday, Jul 24, 2007 at 21:17
Tuesday, Jul 24, 2007 at 21:17
Thanks Richard,
I had done a search and tried that link a few times but it was down. Appears to be working now??
Thanks for your reply, it is giving me exactly what I wanted.
Col.
FollowupID:
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Reply By: Member - Ian F (WA) - Tuesday, Jul 24, 2007 at 21:17
Tuesday, Jul 24, 2007 at 21:17
Col,
It may be a long way but multiply 0.153481 by 60 = 9.20886
then Multiply 0.20886 by 60 = 12.5316
ie answer is 141degrees 9 mins 12.5 seconds
Ian
AnswerID:
254301
Reply By: Skippy In The GU - Tuesday, Jul 24, 2007 at 21:20
Tuesday, Jul 24, 2007 at 21:20
There is
Degress : E141.153333°
which I think is the same as
Degrees Minutes E141° 09.200'
and
Degrees Minutes seconds E141° 09' 12.0"
AnswerID:
254302
Follow Up By: Skippy In The GU - Tuesday, Jul 24, 2007 at 21:22
Tuesday, Jul 24, 2007 at 21:22
my degrees symbol didn't work. that extra number 1 shouldn't be there
FollowupID:
515355
Reply By: swampy66 - Tuesday, Jul 24, 2007 at 22:39
Tuesday, Jul 24, 2007 at 22:39
Col,
in answer to you actual question,
Yes, I think your reading it OK. The converter your using must be rounding off to the second. Probably not not an issue - unless your Surveying.
Cheers
AnswerID:
254324
Follow Up By: Col88 - Tuesday, Jul 24, 2007 at 23:26
Tuesday, Jul 24, 2007 at 23:26
Yeah, I thought so.
I imagine that the decimal makes so little difference that if I can't see what I'm looking for, I shouldn't be there! :-)
Cheers
FollowupID:
515380
Reply By: Graeme - Wednesday, Jul 25, 2007 at 10:25
Wednesday, Jul 25, 2007 at 10:25
Col,
What you are looking at when your GPS truncates the co-ordinate to whole seconds is the limit of diplay accuracy of the device. At any latitude above [or below] zero the distance represented by 0.1 seconds is less than 3 metres ie 1 second is less than 30 metres.
Therefore your GPS is accurate to plus or minus 30 metres per screen output.
In fact they are accurate to less than this distance, usually around 3 to 6 metres, but the software does not display that as an output.
Cheers
AnswerID:
254359
Follow Up By: Col88 - Wednesday, Jul 25, 2007 at 16:53
Wednesday, Jul 25, 2007 at 16:53
Thanks Graeme,
My GPS actually does display down to decimals of a second, it was the converters I was using that weren't .
I have since found one from a link on a previous post that is more accurate. I know it is pedantic, but might as
well get it right.
Cheers
FollowupID:
515472
Follow Up By: Graeme - Thursday, Jul 26, 2007 at 15:01
Thursday, Jul 26, 2007 at 15:01
Col,
Thanks for your reply, my mistake..........I read your initial post wrongly.
I have written a converter into an excel spreadsheet, use it mainly for AGD to GDA conversions, but it also includes decimal to degrees/minutes/seconds and vice versa.
Happy to send you a copy if you like, as it will give you the accuracy you are looking for.
Cheers
FollowupID:
515632
Follow Up By: Col88 - Thursday, Jul 26, 2007 at 20:00
Thursday, Jul 26, 2007 at 20:00
Graeme,
Thanks mate, but I won't trouble you. I have found a link that does the job.
I never thought about a converter in Excel ! Good idea.
Col
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