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class BaseElevationAPI:
def get_elevation(self, *, longitude, latitude):
raise NotImplementedError
def get_ground_point(self, position):
latitude, longitude, _ = position.position_llh
return (
longitude,
latitude,
self.get_elevation(longitude=longitude, latitude=latitude),
)
def get_groundtrack(self, positions):
return [self.get_ground_point(position) for position in positions]
class ZeroElevation(BaseElevationAPI):
def get_elevation(self, *, longitude, latitude):
return 0.0
def compute_groundtrack(predictor, times, elevation_api=ZeroElevation()):
positions = [predictor.get_position(time) for time in times]
return elevation_api.get_groundtrack(positions)
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