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"""Location utility functions."""
import math
# Radius of the Earth in miles
EARTH_RADIUS = 3959.0
class LocationUtils: # pylint: disable=too-few-public-methods
"""Location utility functions."""
@staticmethod
def shift_location(
latitude: float, longitude: float, latitude_delta: float, longitude_delta: float
) -> tuple[float, float]:
"""Calculates a new (latitude, longitude) pair by shifting the location
given by (`latitude`, `longitude`) by (`latitude_delta`, `longitude_delta`).
Args:
latitude: Latitude (in degrees).
longitude: Longitude (in degrees).
latitude_delta: Latitude delta (in miles).
longitude_delta: Longitude delta (in miles).
Returns:
New (latitude, longitude) pair.
"""
# Convert latitude and longitude from degrees to radians
latitude_rad = math.radians(latitude)
longitude_rad = math.radians(longitude)
# Calculate angular distance in radians
angular_latitude_delta = latitude_delta / EARTH_RADIUS
angular_longitude_delta = longitude_delta / EARTH_RADIUS
# Calculate new latitude
new_latitude_rad = latitude_rad + angular_latitude_delta
# Calculate new longitude
new_longitude_rad = longitude_rad + angular_longitude_delta / math.cos(
latitude_rad
)
# Convert new latitude and longitude from radians to degrees
new_latitude = math.degrees(new_latitude_rad)
new_longitude = math.degrees(new_longitude_rad)
return new_latitude, new_longitude
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