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author | Daniel Schadt <kingdread@gmx.de> | 2023-05-31 21:17:03 +0200 |
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committer | Daniel Schadt <kingdread@gmx.de> | 2023-05-31 21:17:03 +0200 |
commit | b1e9c0556eab7faf03ea9d398c2df58f66193220 (patch) | |
tree | e59796dc02c04a9feaf276d33a42903aebaac5bf /fietsboek/convert.py | |
parent | 45f2f09be40aa9f8baa822a6c2502354d27b15d7 (diff) | |
parent | 5db0d6b2f09beed78035cbcc87a6a537f6735673 (diff) | |
download | fietsboek-b1e9c0556eab7faf03ea9d398c2df58f66193220.tar.gz fietsboek-b1e9c0556eab7faf03ea9d398c2df58f66193220.tar.bz2 fietsboek-b1e9c0556eab7faf03ea9d398c2df58f66193220.zip |
Merge branch 'fit-import'
Diffstat (limited to 'fietsboek/convert.py')
-rw-r--r-- | fietsboek/convert.py | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/fietsboek/convert.py b/fietsboek/convert.py new file mode 100644 index 0000000..bf0664a --- /dev/null +++ b/fietsboek/convert.py @@ -0,0 +1,51 @@ +"""Conversion functions to convert between various recording formats.""" +import fitparse +from gpxpy.gpx import GPX, GPXTrack, GPXTrackPoint, GPXTrackSegment + +FIT_RECORD_FIELDS = ["position_lat", "position_long", "altitude", "timestamp"] + + +def semicircles_to_deg(circles: int) -> float: + """Convert semicircles coordinate to degree coordinate. + + :param circles: The coordinate value in semicircles. + :return: The coordinate in degrees. + """ + return circles * (180 / 2**31) + + +def from_fit(data: bytes) -> GPX: + """Reads a .fit as GPX data. + + This uses the fitparse_ library under the hood. + + .. _fitparse: https://pypi.org/project/fitparse/ + + :param data: The input bytes. + :return: The converted structure. + """ + fitfile = fitparse.FitFile(data) + points = [] + for record in fitfile.get_messages("record"): + values = record.get_values() + try: + if any(values[field] is None for field in FIT_RECORD_FIELDS): + continue + point = GPXTrackPoint( + latitude=semicircles_to_deg(values["position_lat"]), + longitude=semicircles_to_deg(values["position_long"]), + elevation=values["altitude"], + time=values["timestamp"], + ) + except KeyError: + pass + else: + points.append(point) + track = GPXTrack() + track.segments = [GPXTrackSegment(points)] + gpx = GPX() + gpx.tracks = [track] + return gpx + + +__all__ = ["from_fit"] |