GPS application - Part I

diego

Member
Licensed User
thanks Mike for your reply. I tried the GPS4ppc tool
http://www.basic4ppc.com/forum/open-source-projects/5208-gps4ppc-v2-0-a.html
from Erel / Ariel and same result (variable position).

Surely the internal GPS of my chinese phone isn't very good...

The average seems to be a good way to solve it, works fine?

I am thinking in another possible solution, rounding the lat/lon to 4 decimals, and it would have a precission about +-4 mt (I guess it would)
 

mjcoon

Well-Known Member
Licensed User
I tried the GPS4ppc tool http://www.basic4ppc.com/forum/open-source-projects/5208-gps4ppc-v2-0-a.html from Erel / Ariel and same result (variable position).

Yes, it is only my version that has the averaging function option! It's a fairly simple bit of code...

Surely the internal GPS of my chinese phone isn't very good...

I think the problem is inherent in the physics and is only partly cured by WAAS, differential GPS or expensive survey-grade or military devices.

The average seems to be a good way to solve it, works fine?

Yes, provided you don't average bearings like I did!

I am thinking in another possible solution, rounding the lat/lon to 4 decimals, and it would have a precission about +-4 mt (I guess it would)

That will help only so long as the variability happens to be in the rounding slack. If it keeps crossing the rounding boundary it may be worse.

Mike.
 

mjcoon

Well-Known Member
Licensed User
I run the ComPorts.sbp on my device and this is what I get:...

I've Googled for ComPorts.sbp and this is the only hit I get. If it's "the" ComPorts.sbp, where would I find it?

Mike.

Edit: Ah, found it by Googling for just ComPorts (when it shows up as a ZIP archive).
 
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