02.08.2013, 17:15
> thank you very much. It helped me to find find some issues in the code.
No problem - I am glad I could contribute something to make the SW better.
> And fixing these issues does not require to write data with more digits.
Well, this was probably not completely clear from my first post, as it's not the main cause for the NMEA parsing problem. My primary wish was to convert between formats without losing any digits of original data. The NMEA parsing problems just poped-up in the process, because I was doing the conversion with the NMEA format in the middle.
The primary problem of rounding errors can be easily demonstrated, if you open the GPX file, save it as NMEA; open the resulting NMEA and save it back to GPX and do the diff. With the increased internal precision this might go away, but I think you'll still need more digits in the GPX and NMEA file for the above process to retain all of the original digits without rounding errors. That's why I introduced additional registry entries for more digits.
No problem - I am glad I could contribute something to make the SW better.
> And fixing these issues does not require to write data with more digits.
Well, this was probably not completely clear from my first post, as it's not the main cause for the NMEA parsing problem. My primary wish was to convert between formats without losing any digits of original data. The NMEA parsing problems just poped-up in the process, because I was doing the conversion with the NMEA format in the middle.
The primary problem of rounding errors can be easily demonstrated, if you open the GPX file, save it as NMEA; open the resulting NMEA and save it back to GPX and do the diff. With the increased internal precision this might go away, but I think you'll still need more digits in the GPX and NMEA file for the above process to retain all of the original digits without rounding errors. That's why I introduced additional registry entries for more digits.