G:P:S: query .

Kevin the grey · Jul 22, 2006

Can the co-ordinates from one G

:S: be fed into another G

:S: ?
Can one user tell an owner of another kind of G

:S: the co-ordinates over the phone and meet up with him at those co-ordinates . Do they have other uses that are not immediately evident ?

kr1 · Jul 22, 2006

Yes. The coordinates are not from the GPS. The are the location of a point on the Earth. Providing you use the same coordinate system and datum. One GPS system will match the same coordinates of another one at the same location. Feeding one set of coordinates from one GPS into another would get you to same the location within the limits of accuracy of the system.

KR

Bill Sanders · Jul 22, 2006

Most handheld GPS systems are capable of displaying either latitude and longitude or military style grid coordinates. Both systems being used by the two persons need to be set to the same setting ie: latidude and longitude OR military grid. I use my Garmin Rhino for marking (Setting a waypoint) good fishing spots on the lakes and streams I fish, so I can return to the same spot, time after time. I also used it to mark IED (improvised explosive device) locations so I could send them up to higher over the military radio, while I was in Iraq.
It also has a two way communications capability but only with compatible devices. I can hook it to my laptop and down load new maps (you have to buy them), and use my laptop as the GPS screen (15 in screen versus a 1.5 in screen).

Kevin the grey · Jul 22, 2006

Very interesting Bill . Does this two way communication exist between two G

:S: units ? In other words , could I feed co-ordinates directly from one unit G

:S: to another with a minimum of interface with the user ? Also if the coordinates had been taken in militairy grid can they be translated into lat , long so that two units may communicate in the same language ?

sogguy · Jul 23, 2006

Kevin the grey said:
Very interesting Bill . Does this two way communication exist between two G:S: units ? In other words , could I feed co-ordinates directly from one unit G:S: to another with a minimum of interface with the user ? Also if the coordinates had been taken in militairy grid can they be translated into lat , long so that two units may communicate in the same language ?

Kevin, I have been around GPS's for about 9 years and use them almost everyday. Email me a mailing address and I'll drop a Garmin GPS V manual in the mail, it outlines almost anything you need.

Dick

Kevin the grey · Jul 23, 2006

sogguy said:
Kevin, I have been around GPS's for about 9 years and use them almost everyday. Email me a mailing address and I'll drop a Garmin GPS V manual in the mail, it outlines almost anything you need.

Dick

O:K: I,ll send you my co-ordinates . L:O:L

kr1 · Jul 23, 2006

Kevin the grey said:
Very interesting Bill . Does this two way communication exist between two G:S: units ? In other words , could I feed co-ordinates directly from one unit G:S: to another with a minimum of interface with the user ? Also if the coordinates had been taken in militairy grid can they be translated into lat , long so that two units may communicate in the same language ?

Just using the same coordinates isn't enough. Make sure you use the same datum. The old North American standard was NAD27. The new standard is WGS84/NAD83. If you use one set of coordinates with one datum and set those coordinates into a GPS set with another you are likely to be off up to 100 meters. I have been using GPS for over 20 years and taught land navigation in the army. I also have used a GPS for APRS and teach land nav for the SAR group in my department, etc, etc.

Transferring the data can be done with the simplest interface being your fingers. You can enter the data from the keypad. Depending on what GPS you own there are different types of interfaces that are available.

If I can be of help let me know.

KR

Edward Teach · Jul 23, 2006

With a pair of these, you can send your position info back and forth via GMRS.

Link

Kevin the grey · Jul 23, 2006

Edward Teach said:
With a pair of these, you can send your position info back and forth via GMRS.

Link

Thanks Teach I thought you were going to throw the " Pirates Code " at me which states .

If ye can,t find yer way with an iron needle ye gob

Ye aint fittin fer the Captains job

When the needle wavers then points to North ,

Ye know just how to set your courth

Sorry me wooden dentures slipped their moorings . L:O:L

BrentH · Jul 23, 2006

Warning - do not try to work out your coordinates from a map!!!!
Have tried this, was around 1km out over 30. this was at sea.

Found, apart from using published data, best way was to go there & press 'mark' then save with details. As I recall, 3 decimal places required. Not achievable with manual equipment.

Good fun though

Happy to stand corrected on this..

Kevin the grey · Jul 23, 2006

Brent would this innacuracy generally be different using different maps .

Would the innaccuracy be the same every time ? Could you compensate for it ?

Edward Teach · Jul 23, 2006

Kevin the grey said:
Thanks Teach I thought you were going to throw the " Pirates Code " at me which states .

If ye can,t find yer way with an iron needle ye gob

Ye aint fittin fer the Captains job

When the needle wavers then points to North ,

Ye know just how to set your courth

Sorry me wooden dentures slipped their moorings . L:O:L

I've done it both ways...with a sextant and dead reckoning, and with a GPS slaved into a laptop loaded with bathymetric charts. The electronic charts/GPS sure do take a lot of the guesswork out of the equation, especially when you're doing something like trawling the bottom.

Kevin the grey · Jul 23, 2006

Edward Teach said:
I've done it both ways...with a sextant and dead reckoning, and with a GPS slaved into a laptop loaded with bathymetric charts. The electronic charts/GPS sure do take a lot of the guesswork out of the equation, especially when you're doing something like trawling the bottom.

The G

:S: equipped radios you showed me sure seem the way to go . I have not had time to look them over carefully . I already have a pair of F:R:S: .Either those or a cell phone go into the woods with me and a partner . If I go for your units I can always trade up .

Do you happen to know if there is a comprimise with the units you showed me ? Sometimes when two units are combined they skimp a little on quality of one function . That is a more than a decent price .

What are you trawling for ? Sunken treasure ? Did you ever come across old maps in your travels that claimed that " X marks the spot " ?

jurassicnarc44 · Jul 25, 2006

Your GPS unit talks to at least two (and hopefully three) geosynchronous satellites, NOT to other hand held GPS units. The minor variations in sat position is why your unit's apparent position does not exactly agree with USGS maps....but DOES agree with my GPS unit which is receiving information, angles and distance, at the same time (usually on the same operation or project) and from the same sats yours is using. If we go to the same coordinates, even with cheaper units (relatively speaking), we should not only see each other, but be able to call out and be heard easily by one another. I have done this in the jungle in So. America and S.E. Asia and IT WORKS.

Beware the "do everything" units.....You are better off with a dedicated, exact position device, rather than one which purports to do everything including wipe your.....nose.