Missing speed values

[jimbo8]

Thanks for the reply. I have attached below the results of the list of positions as shown in RouteConverter (1.33), and the NMEA sentances that form the input for this portion. Comparison of the two sets of data shows missing positions (i.e. not consecutive seconds), missing speeds and missing height. Note that the NMEA sentances have been created by me from other data and therefore may not be syntactically correct!
I think that there are 'filters' which eliminate consecutive positions which are within a tolerance?

Code:

1/1/10 1:27:11 PM          -1.676403     55.1630966     99 m
1/1/10 1:27:12 PM          -1.676408     55.1630966     99 m
1/1/10 1:27:15 PM          -1.676471     55.1631049     99 m
1/1/10 1:27:17 PM          -1.676548     55.1631083     99 m
1/1/10 1:27:18 PM          -1.676596     55.1631133     99 m
1/1/10 1:27:20 PM          -1.676711     55.1631233     99 m
1/1/10 1:27:23 PM          -1.676925      55.1631316     99 m
1/1/10 1:27:24 PM    19 Km/h      -1.677004     55.163135     99 m
1/1/10 1:27:25 PM    20 Km/h      -1.677091     55.163135     99 m
1/1/10 1:27:26 PM    21 Km/h      -1.677179     55.16314     
1/1/10 1:27:27 PM    21 Km/h      -1.67727      55.16314     99 m
1/1/10 1:27:28 PM    21 Km/h      -1.677361     55.1631433     99 m
1/1/10 1:27:30 PM    22 Km/h      -1.677549     55.1631466     


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$GPRMC,132711,A,5509.7858,N,00140.5842,W,0.3,275.6,010110,,*9
$GPGGA,132712,5509.7858,N,00140.5845,W,1,07,1.0,98.9,M,,M,,*76
$GPRMC,132712,A,5509.7858,N,00140.5845,W,1.1,276.9,010110,,*2
$GPGGA,132713,5509.7861,N,00140.5854,W,1,07,1.0,98.9,M,,M,,*7d
$GPRMC,132713,A,5509.7861,N,00140.5854,W,2.1,278.3,010110,,*e
$GPGGA,132714,5509.7861,N,00140.5866,W,1,07,1.0,98.9,M,,M,,*7b
$GPRMC,132714,A,5509.7861,N,00140.5866,W,3.0,277.5,010110,,*1
$GPGGA,132715,5509.7863,N,00140.5883,W,1,07,1.0,98.9,M,,M,,*73
$GPRMC,132715,A,5509.7863,N,00140.5883,W,3.8,275.7,010110,,*1
$GPGGA,132716,5509.7863,N,00140.5904,W,1,07,1.0,98.9,M,,M,,*7e
$GPRMC,132716,A,5509.7863,N,00140.5904,W,4.7,275.9,010110,,*a
$GPGGA,132717,5509.7865,N,00140.5929,W,1,07,1.0,98.9,M,,M,,*76
$GPRMC,132717,A,5509.7865,N,00140.5929,W,5.5,276.9,010110,,*2
$GPGGA,132718,5509.7868,N,00140.5958,W,1,07,1.0,98.8,M,,M,,*73
$GPRMC,132718,A,5509.7868,N,00140.5958,W,6.3,276.7,010110,,*d
$GPGGA,132719,5509.7872,N,00140.5991,W,1,07,1.0,98.8,M,,M,,*7c
$GPRMC,132719,A,5509.7872,N,00140.5991,W,7.1,275.9,010110,,*c
$GPGGA,132720,5509.7874,N,00140.6027,W,1,07,1.0,98.7,M,,M,,*78
$GPRMC,132720,A,5509.7874,N,00140.6027,W,7.7,274.5,010110,,*c
$GPGGA,132721,5509.7877,N,00140.6067,W,1,07,1.0,98.7,M,,M,,*7e
$GPRMC,132721,A,5509.7877,N,00140.6067,W,8.4,275.3,010110,,*1
$GPGGA,132722,5509.7879,N,00140.6109,W,1,07,1.0,98.7,M,,M,,*7a
$GPRMC,132722,A,5509.7879,N,00140.6109,W,9.0,273.1,010110,,*4
$GPGGA,132723,5509.7879,N,00140.6155,W,1,07,1.0,98.6,M,,M,,*73
$GPRMC,132723,A,5509.7879,N,00140.6155,W,9.6,272.8,010110,,*2
$GPGGA,132724,5509.7881,N,00140.6203,W,1,07,1.0,98.6,M,,M,,*73
$GPRMC,132724,A,5509.7881,N,00140.6203,W,10.3,270.2,010110,,*37
$GPGGA,132725,5509.7881,N,00140.6255,W,1,07,1.0,98.6,M,,M,,*71
$GPRMC,132725,A,5509.7881,N,00140.6255,W,10.7,272.9,010110,,*38
$GPGGA,132726,5509.7884,N,00140.6308,W,1,06,1.0,98.6,M,,M,,*7f
$GPRMC,132726,A,5509.7884,N,00140.6308,W,11.1,272.0,010110,,*39
$GPGGA,132727,5509.7884,N,00140.6362,W,1,06,1.0,98.6,M,,M,,*72
$GPRMC,132727,A,5509.7884,N,00140.6362,W,11.2,271.3,010110,,*37
$GPGGA,132728,5509.7886,N,00140.6417,W,1,07,1.0,98.5,M,,M,,*78
$GPRMC,132728,A,5509.7886,N,00140.6417,W,11.4,270.8,010110,,*33
$GPGGA,132729,5509.7886,N,00140.6473,W,1,07,1.0,98.5,M,,M,,*7b
$GPRMC,132729,A,5509.7886,N,00140.6473,W,11.6,271.4,010110,,*3f
$GPGGA,132730,5509.7888,N,00140.6530,W,1,07,1.0,98.4,M,,M,,*7a
$GPRMC,132730,A,5509.7888,N,00140.6530,W,11.8,270.3,010110,,*37