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he descubierto algunas cosillas mas:
83 60 FF FF 06 00 02 00 00 55 00

el 83 indica que empieza la coordenada

el 60 es el tiempo que hay entre la coordenada actual y la siguiente, si paso este valor a decimal y lo sumo me da el siguiente tiempo. Sobre los decimales aqui los omite supongo que despues el programa se encarga de ponerlos.

FF FF es la longitud de la coordenada, si la coordenada es la misma que la anterior son todo ceros, por lo tanto este valor en hexadecimal no expresa la longitud tal cual si no una variacion de la longitud anterior o algo parecido. Sobre los decimales aqui diria que tampoco hay porque las variaciones son muy pequeñas y o hacen falta, si lo paso a decimal el numero no es muy descabellado pero de momento no le veo relacion

06 00 indica la latitud y es lo mismo que antes

02 00 indica la altitud, pasandolo a decimal tampoco veo una relacion trivial.

00 55 nidea

00 son los metros recorridos pero no veo la relacion si lo paso a decimal.

¿alguna idea?

tengo un archivo dat donde contiene unas coordenadas en gps con la veolcidad altura etc. con el editor hexadecimal he podido encontrar la linea exacta de cada coordenada y identificar la latitud y longitud pero no se descifrarlo, aqui dejo un ejemplo:
lineas del dat en hexadecimal

Código [Seleccionar] Expandir


00 00 00 00 01 A8 69 BD 02 A0 6A E1 00 01 C9 13 00 00 03 13 60 C2 05 A0 6A E1 00 01 C9 13 00 00 02 68 11 F3 05 A0 6A E1 00 2E 00 00 00 03 39 00 00 00 FC B7 72 02 03 96 11 00 CC 05 00 00 00 00 00 00 00 00
83 58 00 00 00 00 00 00 00 00 00
83 66 00 00 00 00 00 00 00 00 00
83 61 00 00 00 00 00 00 00 00 00
83 64 00 00 00 00 00 00 00 00 00
83 6A 00 00 00 00 00 00 00 00 00
83 5F 00 00 00 00 00 00 00 00 00
83 62 00 00 00 00 00 00 00 00 00
83 69 00 00 00 00 00 00 00 00 00
83 62 00 00 00 00 00 00 00 00 00
83 60 FF FF 06 00 02 00 00 55 00
93 CB 02 00 1C 00 FC FF F1 00 89 01
83 60 02 00 15 00 03 00 FB 28 01
83 67 03 00 17 00 02 00 4B 47 01
83 6B 04 00 16 00 FF FF FF 3C 01
83 5C 06 00 0F 00 04 00 3F ED 00
83 63 06 00 11 00 01 00 99 07 01
93 C9 00 00 00 00 00 00 F2 FE 00 00
83 65 00 00 00 00 00 00 00 00 00
83 66 00 00 00 00 00 00 00 00 00
83 61 00 00 00 00 00 00 00 00 00
83 66 00 00 00 00 00 00 00 00 00
83 C6 FF FF D4 FF B1 FF 00 67 02
83 62 00 00 00 00 00 00 00 00 00
83 67 00 00 00 00 00 00 00 00 00
83 69 00 00 00 00 00 00 00 00 00
83 5E 00 00 00 00 00 00 00 00 00
83 70 00 00 00 00 00 00 00 00 00
83 66 00 00 00 00 00 00 00 00 00
93 B8 07 00 04 00 FB FF B9 00 8D 00
83 65 02 00 06 00 00 00 A6 5C 00
83 64 00 00 00 00 00 00 A1 00 00
83 67 FD FF 04 00 03 00 00 4F 00
83 78 FA FF 01 00 00 00 68 70 00
83 4E FF FF 02 00 FF FF 98 22 00
83 9E FE FF 09 00 00 00 7D 83 00
83 67 00 00 00 00 00 00 83 00 00
83 25 00 00 00 00 00 00 00 00 00
83 63 00 00 00 00 00 00 00 00 00
83 63 00 00 00 00 00 00 00 00 00
83 68 00 00 00 00 00 00 00 00 00
83 62 00 00 04 00 FF FF 00 38 00
83 65 02 00 08 00 00 00 79 75 00
83 64 07 00 00 00 F8 FF 01 82 00
83 6A 0B 00 05 00 00 00 4C D8 00
93 C2 00 00 00 00 00 00 3A FF 00 00

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

aqui las coordenadas reales:

Código [Seleccionar] Expandir

total time,total time unit,real time,distance,distance unit,total distance,total distance unit,latitude,longitude,altitude,altitude unit,speed,speed unit,pace,pace unit,fix quality
00:00:00.57,"HHMMSSSS",2010-08-03 15:27:13.74,0.00,"km",0.00,"km",41.1210600000,1.2541916667,148,"m",0.0,"km/h",0:00,"min/km",3
00:00:01.45,"HHMMSSSS",2010-08-03 15:27:14.62,0.00,"km",0.00,"km",41.1210600000,1.2541916667,148,"m",0.0,"km/h",0:00,"min/km",3
00:00:02.47,"HHMMSSSS",2010-08-03 15:27:15.64,0.00,"km",0.00,"km",41.1210600000,1.2541916667,148,"m",0.0,"km/h",0:00,"min/km",3
00:00:03.44,"HHMMSSSS",2010-08-03 15:27:16.61,0.00,"km",0.00,"km",41.1210600000,1.2541916667,148,"m",0.0,"km/h",0:00,"min/km",3
00:00:04.44,"HHMMSSSS",2010-08-03 15:27:17.61,0.00,"km",0.00,"km",41.1210600000,1.2541916667,148,"m",0.0,"km/h",0:00,"min/km",3
00:00:05.50,"HHMMSSSS",2010-08-03 15:27:18.67,0.00,"km",0.00,"km",41.1210600000,1.2541916667,148,"m",0.0,"km/h",0:00,"min/km",3
00:00:06.45,"HHMMSSSS",2010-08-03 15:27:19.62,0.00,"km",0.00,"km",41.1210600000,1.2541916667,148,"m",0.0,"km/h",0:00,"min/km",3
00:00:07.43,"HHMMSSSS",2010-08-03 15:27:20.60,0.00,"km",0.00,"km",41.1210600000,1.2541916667,148,"m",0.0,"km/h",0:00,"min/km",3
00:00:08.48,"HHMMSSSS",2010-08-03 15:27:21.65,0.00,"km",0.00,"km",41.1210600000,1.2541916667,148,"m",0.0,"km/h",0:00,"min/km",3
00:00:09.46,"HHMMSSSS",2010-08-03 15:27:22.63,0.00,"km",0.00,"km",41.1210600000,1.2541916667,148,"m",0.0,"km/h",0:00,"min/km",3
00:00:10.42,"HHMMSSSS",2010-08-03 15:27:23.59,0.00,"km",0.00,"km",41.1210583333,1.2542016667,148,"m",0.0,"km/h",0:00,"min/km",3
00:00:12.45,"HHMMSSSS",2010-08-03 15:27:25.62,0.00,"km",0.00,"km",41.1210616667,1.2542483333,148,"m",8.7,"km/h",6:54,"min/km",3
00:00:13.41,"HHMMSSSS",2010-08-03 15:27:26.58,0.00,"km",0.01,"km",41.1210650000,1.2542833333,148,"m",8.5,"km/h",7:03,"min/km",3
00:00:14.44,"HHMMSSSS",2010-08-03 15:27:27.61,0.00,"km",0.01,"km",41.1210700000,1.2543216667,148,"m",11.2,"km/h",5:21,"min/km",3
00:00:15.51,"HHMMSSSS",2010-08-03 15:27:28.68,0.00,"km",0.01,"km",41.1210766667,1.2543583333,148,"m",11.2,"km/h",5:22,"min/km",3
00:00:16.43,"HHMMSSSS",2010-08-03 15:27:29.60,0.00,"km",0.02,"km",41.1210866667,1.2543833333,149,"m",13.4,"km/h",4:28,"min/km",3
00:00:17.42,"HHMMSSSS",2010-08-03 15:27:30.59,0.00,"km",0.02,"km",41.1210966667,1.2544116667,149,"m",9.7,"km/h",6:10,"min/km",3
00:00:19.43,"HHMMSSSS",2010-08-03 15:27:32.60,0.00,"km",0.02,"km",41.1210966667,1.2544116667,149,"m",0.0,"km/h",0:00,"min/km",3
00:00:20.44,"HHMMSSSS",2010-08-03 15:27:33.61,0.00,"km",0.02,"km",41.1210966667,1.2544116667,149,"m",0.0,"km/h",0:00,"min/km",3
00:00:21.46,"HHMMSSSS",2010-08-03 15:27:34.63,0.00,"km",0.02,"km",41.1210966667,1.2544116667,149,"m",0.0,"km/h",0:00,"min/km",3
00:00:22.43,"HHMMSSSS",2010-08-03 15:27:35.60,0.00,"km",0.02,"km",41.1210966667,1.2544116667,149,"m",0.0,"km/h",0:00,"min/km",3
00:00:23.45,"HHMMSSSS",2010-08-03 15:27:36.62,0.00,"km",0.02,"km",41.1210966667,1.2544116667,149,"m",0.0,"km/h",0:00,"min/km",3
00:00:25.43,"HHMMSSSS",2010-08-03 15:27:38.60,0.01,"km",0.03,"km",41.1210950000,1.2543383333,141,"m",0.0,"km/h",0:00,"min/km",3
00:00:26.41,"HHMMSSSS",2010-08-03 15:27:39.58,0.00,"km",0.03,"km",41.1210950000,1.2543383333,141,"m",0.0,"km/h",0:00,"min/km",3
00:00:27.44,"HHMMSSSS",2010-08-03 15:27:40.61,0.00,"km",0.03,"km",41.1210950000,1.2543383333,141,"m",0.0,"km/h",0:00,"min/km",3
00:00:28.49,"HHMMSSSS",2010-08-03 15:27:41.66,0.00,"km",0.03,"km",41.1210950000,1.2543383333,141,"m",0.0,"km/h",0:00,"min/km",3
00:00:29.43,"HHMMSSSS",2010-08-03 15:27:42.60,0.00,"km",0.03,"km",41.1210950000,1.2543383333,141,"m",0.0,"km/h",0:00,"min/km",3
00:00:30.55,"HHMMSSSS",2010-08-03 15:27:43.72,0.00,"km",0.03,"km",41.1210950000,1.2543383333,141,"m",0.0,"km/h",0:00,"min/km",3
00:00:31.57,"HHMMSSSS",2010-08-03 15:27:44.74,0.00,"km",0.03,"km",41.1210950000,1.2543383333,141,"m",0.0,"km/h",0:00,"min/km",3
00:00:33.41,"HHMMSSSS",2010-08-03 15:27:46.58,0.00,"km",0.03,"km",41.1211066667,1.2543450000,140,"m",6.7,"km/h",9:00,"min/km",3
00:00:34.42,"HHMMSSSS",2010-08-03 15:27:47.59,0.00,"km",0.03,"km",41.1211100000,1.2543550000,140,"m",3.4,"km/h",17:32,"min/km",3
00:00:35.42,"HHMMSSSS",2010-08-03 15:27:48.59,0.00,"km",0.03,"km",41.1211100000,1.2543550000,140,"m",0.0,"km/h",0:00,"min/km",3
00:00:36.45,"HHMMSSSS",2010-08-03 15:27:49.62,0.00,"km",0.03,"km",41.1211050000,1.2543616667,141,"m",0.0,"km/h",0:00,"min/km",3
00:00:37.65,"HHMMSSSS",2010-08-03 15:27:50.82,0.00,"km",0.03,"km",41.1210950000,1.2543633333,141,"m",3.7,"km/h",16:01,"min/km",3
00:00:38.43,"HHMMSSSS",2010-08-03 15:27:51.60,0.00,"km",0.03,"km",41.1210933333,1.2543666667,140,"m",0.0,"km/h",0:00,"min/km",3
00:00:40.01,"HHMMSSSS",2010-08-03 15:27:53.18,0.00,"km",0.03,"km",41.1210900000,1.2543816667,140,"m",4.5,"km/h",13:19,"min/km",3
00:00:41.04,"HHMMSSSS",2010-08-03 15:27:54.21,0.00,"km",0.03,"km",41.1210900000,1.2543816667,140,"m",0.0,"km/h",0:00,"min/km",3
00:00:41.41,"HHMMSSSS",2010-08-03 15:27:54.58,0.00,"km",0.03,"km",41.1210900000,1.2543816667,140,"m",0.0,"km/h",0:00,"min/km",3
00:00:42.40,"HHMMSSSS",2010-08-03 15:27:55.57,0.00,"km",0.03,"km",41.1210900000,1.2543816667,140,"m",0.0,"km/h",0:00,"min/km",3
00:00:43.39,"HHMMSSSS",2010-08-03 15:27:56.56,0.00,"km",0.03,"km",41.1210900000,1.2543816667,140,"m",0.0,"km/h",0:00,"min/km",3
00:00:44.43,"HHMMSSSS",2010-08-03 15:27:57.60,0.00,"km",0.03,"km",41.1210900000,1.2543816667,140,"m",0.0,"km/h",0:00,"min/km",3
00:00:45.41,"HHMMSSSS",2010-08-03 15:27:58.58,0.00,"km",0.03,"km",41.1210900000,1.2543883333,140,"m",0.0,"km/h",0:00,"min/km",3
00:00:46.42,"HHMMSSSS",2010-08-03 15:27:59.59,0.00,"km",0.03,"km",41.1210933333,1.2544016667,140,"m",4.4,"km/h",13:46,"min/km",3
00:00:47.42,"HHMMSSSS",2010-08-03 15:28:00.59,0.00,"km",0.03,"km",41.1211050000,1.2544016667,140,"m",4.4,"km/h",13:39,"min/km",3
00:00:48.48,"HHMMSSSS",2010-08-03 15:28:01.65,0.00,"km",0.04,"km",41.1211233333,1.2544100000,140,"m",7.1,"km/h",8:25,"min/km",3
00:00:50.42,"HHMMSSSS",2010-08-03 15:28:03.59,0.00,"km",0.04,"km",41.1211233333,1.2544100000,140,"m",0.0,"km/h",0:00,"min/km",3



lo que he podido deducir es lo siguiente:
-Las dos primeras lineas indica la coordenada incial ni idea de como sacarla ni si hay mas informacion.
- si una coordenada tiene la siguiente forma: 83 60 FF FF 06 00 02 00 00 55 00  
las FF FF son la latitud y 06 00 la longitud.
-La parte que hay despues del 83 diria que tiene algo k ver con el tiempo
-las lineas que empiezan por 93 indican que se ha pasado del reposo a una velocidad x y viceversa.
archivo dat en cuestion http://www.megaupload.com/?d=I3RT98CE