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Commit 8fa7d31c authored by Kien Le's avatar Kien Le
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Fix converting GPS longitude unint

parent 7774e9bb
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......@@ -49,9 +49,12 @@ class GPSWidget(QtWidgets.QWidget):
latitude_range = max_latitude - min_latitude
longitude_range = max_longitude - min_longitude
longitude_range = convert_longitude_degree_to_meter(longitude_range,
latitude_range)
latitude_range = convert_latitude_degree_to_meter(latitude_range)
# Use the average latitude as the latitude in the longitude conversion
# to find the average range of longitude.
longitude_range = convert_longitude_degree_to_meter(
longitude_range, (max_latitude + min_latitude) / 2
)
self.ax.plot(all_longitudes, all_latitudes, 'ws', markersize=4,
markeredgecolor='black', picker=True, pickradius=4)
......@@ -219,7 +222,7 @@ def convert_longitude_degree_to_meter(long: float, lat: float) -> float:
long_degree_length_in_meter = EQUATORIAL_CIRCUMFERENCE / 360
# The length of a longitude degree varies with the latitude, being greatest
# around the equator and approaching 0 near to the poles.
adjustment_for_latitude = math.cos(lat)
adjustment_for_latitude = math.cos(math.radians(lat))
return long * long_degree_length_in_meter * adjustment_for_latitude
......
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