problems with coordination on GPS Module

Tips and questions relating to the GPS modules from SFE
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williamrdg
Posts: 5
Joined: Fri Aug 13, 2010 6:18 pm
Location: New Jersey

problems with coordination on GPS Module

Post by williamrdg » Sun Dec 18, 2011 10:04 pm

Hey i have a gps module working and i been getting the coordination, but when i go in google maps the map is in the ocean. i was wondering if theres any formula to find the exact coordination

plecharts
Posts: 5
Joined: Sat Oct 30, 2010 6:42 am

Re: problems with coordination on GPS Module

Post by plecharts » Sun Dec 18, 2011 10:44 pm

Well, there are two possibilities:
1) You are getting factory-default coordinates, which are transmitted when the GPS receiver does not have a lock at at least three sattellites.
2) You have dead GPS receiver. This has happened to me too, and you can try to compensate it software-side, but you will only have a precision of about +- 300m. Basically the GPS module sends you your position, but it divides the coordinates by a close-to-1 number and it can cause the coordinates to be off by an order of kilometres.

ALSO: You may be parsing it wrong, but if you are using some libraries that are known to work, it is almost sure the problem is explained in the two reasons above.

skimask
Support Volunteer
Posts: 1077
Joined: Sun Nov 09, 2008 2:11 am
Location: Minot, N.D.

Re: problems with coordination on GPS Module

Post by skimask » Sun Dec 18, 2011 11:04 pm

Guess where a LAT/LONG of 0d0m0s/0d0m0s is located?!?!
I ignore "one post wonders".

plecharts
Posts: 5
Joined: Sat Oct 30, 2010 6:42 am

Re: problems with coordination on GPS Module

Post by plecharts » Mon Dec 19, 2011 1:59 pm

Coordinates 0.0 N 0.0 E would just mean the GPS receiver does not have a fix on the sattellites, in real-life application you would probably never have an exact 0.0 0.0 location with ordinary GPS receiver.

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