Re: [Gpsbabel-misc] iGO8 .TRK

[Á. K. <xer...@gm...>]

Oh, my goodness...that simple, and I was fighting with the bits :)

I am sitting in Budapest, Hungary. Unfortunately both coordinates are positive.

I will test it during the weekend for the negative values.

br,

aron

On Thu, May 22, 2008 at 1:06 AM, Ron Parker <ro...@pa...> wrote:
> Robert Lipe wrote:
>>
>> If you start with delgpl.c, add the funky 9-bit handling, swap the record
>> order to match,
>> and whack the code dealing with things like heading, speed, and the
>> various unknown
>> fields,  you should be able to have something up pretty quickly.
>
> It's not really all that funky, or at least the example coordinate isn't.
>  Just take the whole DWORD and divide by 0x800000; don't bother messing with
> bits:
>
> Taking Áron's original example, we just take 0x17BE4C91 (398347409 decimal)
> and divide by 0x800000 (8388608 decimal, as mentioned):
>
> 398347409/8388608 = 47.48671162128448486328125, give or take a dozen
> sigfigs.
>
> The question, and this is the important one, is this: is Áron in the eastern
> and northern hemispheres?  What's a negative coordinate look like?  Is the
> entire DWORD in twos complement, or just those first nine bits?  Or is a
> negative number expressed in some other, less intuitive way?
>
>
>



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