Garmin FIT Course (Flexible and Interoperable Data Transfer)
Open BetaFIT is Garmin's binary fitness protocol that powers Forerunner watches, Edge bike computers, Fenix multisport devices, plus Wahoo, Polar and Bryton gear. On osm2cdr we write FIT in the Course profile: the roads and paths of your selected area are chained by nearest endpoints into connected runs — segments follow the ways that touch instead of the order they were read in, and the chaining works at any density, with no cut-off. To be honest about the content: this is the road network of your bbox, not one planned route — where two ways do not meet, the track moves to the next run in a straight line. Those transfers are not counted as distance: lap.total_distance is the length of the ways themselves, not the sum of the jumps between them. Every point carries coordinates (in semicircles, Garmin's integer units), cumulative distance and a timestamp derived from a nominal speed; the file holds a header, file_id, course and lap messages, start/stop events and CRC-16 checksums — fields laid out strictly per the FIT profile and verified with an independent parser. Honest about the data too: this is an export of geometry, not a recorded workout — there is no heart rate, cadence, power or elevation in the file, because those come from sensors during the ride, not from the map. Very long exports are downsampled to 10,000 points — thinning happens inside the runs, and both ends of every run are kept.
Características principales
Acerca del formato FIT
FIT es el protocolo binario de ANT y Garmin con el que los dispositivos deportivos almacenan y transmiten datos. Es más compacto que los formatos de texto y no solo lo entiende Garmin: FIT lo leen Wahoo, Bryton y Polar, además de servicios como Garmin Connect, Strava y TrainingPeaks.
Dentro del protocolo hay varios perfiles, y dos de ellos se confunden con facilidad. Activity es un entrenamiento que ya ha ocurrido, con las lecturas de los sensores. Course es la ruta por la que el dispositivo debe guiarle. De un mapa solo se puede obtener lo segundo, así que escribimos precisamente Course.
The file contains route vertices with coordinates and timestamps, packed by FIT's rules: a header, definition and data messages, and a checksum. Coordinates are stored in Garmin semicircles — as integers rather than fractional degrees. The course is assembled from the roads and paths of the area you selected, not from one planned route: segments are chained by nearest endpoints into connected runs, but where two ways do not meet, the track moves to the next run in a straight line. Those transfers are not counted in the lap distance — it shows the length of the roads themselves, not the sum of the jumps between them. Long exports are thinned down to 10,000 points evenly inside each run, with both ends of every run kept.
En el archivo no hay ni puede haber frecuencia cardiaca, cadencia, potencia ni altitud barométrica: esas magnitudes las miden los sensores durante la actividad, no el mapa.
Programas para abrir archivos FIT
Los siguientes programas y aplicaciones pueden abrir, editar y procesar archivos Garmin FIT Course (Flexible and Interoperable Data Transfer) (.fit) exportados desde OSM2CDR:
Format specifications
- Proprietary format
- 2D only
- Lossless (no quality loss)
- No attributes
- Output: 1 file
- A Garmin FIT Course file: route vertices as trackpoints (lat/lon/time) in semicircles with CRC-16; route geometry only (no HR/cadence/power), downsampled to 10,000 points.
Quién usa los mapas FIT
Cómo exportar a FIT
Cómo abrir tras la exportación
- Garmin Edge, Forerunner, Fenix — conecte el dispositivo por USB y copie el .fit en la carpeta Garmin/Courses (en algunos modelos, NewFiles); al desconectarlo, la ruta aparecerá en la sección de recorridos.
- Garmin Connect Mobile — «Entrenamiento → Recorridos → Importar» y, a continuación, envío al reloj o al ciclocomputador por Bluetooth, sin cables.
- Strava — súbala como ruta a «Mis rutas»; desde ahí el track llegará al dispositivo si tiene configurada la sincronización.
- Wahoo ELEMNT, Bryton, Polar — importación desde la aplicación oficial o copia en la carpeta de rutas del dispositivo: estos aparatos leen FIT Course.
- GPSBabel — gpsbabel -i garmin_fit -f route.fit -o gpx -F route.gpx convierte el recorrido en GPX, si necesita un formato que se pueda leer a simple vista.
Mapas populares en FIT
Exportar mapas a Garmin FIT Course (Flexible and Interoperable Data Transfer)
Descarga mapas FIT profesionales desde OpenStreetMap. Generación instantánea, cualquier área.