Some NMEA file parsing problems

[mrihtar]

> Please provide me with a test file that shows the problem.

Code:

$GPZDA,100436,29,07,2013,,*44
$GPRMC,100436,A,4300.898329,N,00948.227878,E,0.0000,,290713,,A*4F
$GPGGA,100436,4300.898329,N,00948.227878,E,1,,,203.0821,M,,M,,*4B
$GPWPL,4300.898329,N,00948.227878,E,Position 1*60
$GPVTG,,T,,M,0.0000,N,0.0000,K,A*23
$GPZDA,100436,29,07,2013,,*44
$GPRMC,100436,A,4300.898328,N,00948.227878,E,0.0216,,290713,,A*4B
$GPGGA,100436,4300.898328,N,00948.227878,E,1,,,203.0060,M,,M,,*47
$GPWPL,4300.898328,N,00948.227878,E,Position 2*62
$GPVTG,,T,,M,0.0216,N,0.0400,K,A*22
$GPZDA,100437,29,07,2013,,*45
$GPRMC,100437,A,4300.898328,N,00948.227878,E,0.0000,,290713,,A*4F
$GPGGA,100437,4300.898328,N,00948.227878,E,1,,,203.0317,M,,M,,*45
$GPWPL,4300.898328,N,00948.227878,E,Position 3*63
$GPVTG,,T,,M,0.0000,N,0.0000,K,A*23
$GPZDA,100441,29,07,2013,,*44
$GPRMC,100441,A,4300.888168,N,00948.241986,E,10.4306,,290713,,A*79
$GPGGA,100441,4300.888168,N,00948.241986,E,1,,,203.0079,M,,M,,*48
$GPWPL,4300.888168,N,00948.241986,E,Position 4*63
$GPVTG,,T,,M,10.4306,N,19.3175,K,A*2B
$GPZDA,100446,29,07,2013,,*43
$GPRMC,100446,A,4300.887436,N,00948.263022,E,11.0955,,290713,,A*71
$GPGGA,100446,4300.887436,N,00948.263022,E,1,,,203.0009,M,,M,,*4E
$GPWPL,4300.887436,N,00948.263022,E,Position 5*64
$GPVTG,,T,,M,11.0955,N,20.5489,K,A*28

This file has 5 points with the following characteristics:
- first two points compared have the same time, but a slightly different positions
- second two points compared have the same position, but 1 second difference in time
- last two points are normal points (different position and time)

Official version of RouteConverter (v2.10) reads this file as 4 points only with some points/data (time, elevation) lost and duplicated time on last two points. Even if you feed the official version with a simpler NMEA file, it will behave the same (1. point problem, last points duplicated).

Of course there are much more combinations of entries in NMEA files which I didn't test, but at least with this fix I can process NMEA files that I got hands on.