aviation_gis_tools: Polar coordinates

First, we need import classes that will be useful:

from aviation_ellipsoid_calc_tools import vincenty_direct_solution
from aviation_bearing_tools import MagVar, Bearing
from aviation_coordinate_tools import CoordinatesPair

Constructor of LocalOriginPoint class:

class LocalOriginPoint(CoordinatesPair):
    def __init__(self, src_lat, src_lon, src_mag_var, origin_id='', origin_name=''):
        CoordinatesPair.__init__(self, src_lat, src_lon)
        self.mag_var = MagVar(src_mag_var)
        self.origin_id = origin_id
        self.origin_name = origin_name
        self.check_init_data()

Definition of check_init_data() function:

def check_init_data(self):
    if self.mag_var.is_valid is False:
        self.is_valid = False
        self.err_msg += self.mag_var.err_msg

Constructor of LocalPolarEndPoint class:

class LocalPolarEndPoint:
    def __init__(self, origin_point: LocalOriginPoint, brng: Bearing, dist_m):
        self.origin_point = origin_point
        self.brng = brng
        self.dist_m = dist_m
        self._ep_lon_dd = None
        self._ep_lat_dd = None
        self.calc_ep()

Definition of calc_ep() function:

def calc_ep(self):
    self.brng.calc_tbrng(self.origin_point.mag_var.dd_value)
    self.ep_lat_dd, self.ep_lon_dd = vincenty_direct_solution(self.origin_point.dd_lat,
                                                              self.origin_point.dd_lon,
                                                              self.brng.dd_tbrng,
                                                              self.dist_m,
                                                              WGS84_A, WGS84_B, WGS84_F)