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What Is The Standard Hdd Hh Mmm Format? Should be easy? I couldn't find answer.

#1 User is offline   Tiki_Guy 

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  Posted 25 July 2004 - 08:04 PM

I finally figured out that I can enter a waypoint on my Father's Garmin Etrax.

However I think I did something wrong because I was about 1/2 a mile off when I tested it today.

The Garman has about 50 different settings for GPS numbers.

I think I had it set for min.sec

What format at the standard GEOcatching numbers in?
HDD MMM SSS etc.
for a number that looks like this?

N 42 50.485 W 070 55.481

#2 User is offline   Morock & Miss C 

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Posted 25 July 2004 - 08:31 PM

I set our Garmin Rino 120's for hddd* mm.mmm'

Map Datum at WGS 84. You'll get more info when the really smart people sign in.

Have a blast geocaching and be careful out there. :(

#3 User is offline   AtoZ 

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  Posted 26 July 2004 - 05:35 AM

Actually there is DD MM SS or DD DM or Dec D
DDMMSS is degrees minutes seconds
DD DM is degrees decimal minutes
Dec D is decimal degrees

Also you need to insure you have the correct DATUM as stated above.

Get a good GPS book to really understand what is going on here.
cheers

#4 User is offline   welch 

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Posted 26 July 2004 - 01:32 PM

Tiki_Guy, on Jul 25 2004, 08:04 PM, said:

I finally figured out that I can enter a waypoint on my Father's Garmin Etrax.

However I think I did something wrong because I was about 1/2 a mile off when I tested it today.

The Garman has about 50 different settings for GPS numbers.

I think I had it set for min.sec

What format at the standard GEOcatching numbers in?
HDD MMM SSS etc.
for a number that looks like this?

N 42 50.485 W 070 55.481

Coords off of cache pages are given in degrees minutes decimal minutes. it should look like HDDD.MM.MM or HDDD.MM.MMM in the options.

#5 User is offline   AndyCr15 

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Posted 30 July 2004 - 10:45 AM

Right, if the co-ords are given as - N 51 39.216 W 000 08.905

But I need to enter in the format - XXXo XX'XX" W and XXXo XX'XX" N

Can I just multiply .905 by 60 to get the seconds or are they completely different formats?

#6 User is offline   Smitherington 

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Posted 30 July 2004 - 11:04 AM

You can do the multiplication thing.

You can also change the way your GPSr displays the coords.

My Etrex Legend can be changed but it is not with me so I cannot tell you how right now.

#7 User is offline   EraSeek 

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Posted 30 July 2004 - 12:25 PM

hddd* mm.mmm'
This literally means,
Hemisphere, degrees, minutes, decimal minutes

So N 47 45.122'
W122 23.883'

Would be HDD MM.mmm HDDD MM.mmm
Or degrees, minutes, decimal minutes


HDD MM SS would be degrees, minutes, seconds. You cannot have MMM or SSS as how there are only 60 seconds in a minute, and 60 minutes in a degree. But there are 360 degrees.

You can input coords in what every format you have them in, into your GPS by switching the setup to that format. AND then you can switch to whaterever other format you wish and the coords will be translatated to that format by your GPS.

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