| # utils.py | |
| import numpy as np | |
| from config import EARTH_RADIUS_KM | |
| def deg_to_rad(degrees): | |
| return degrees * (np.pi / 180) | |
| def distcalculate(lat1, lon1, lat2, lon2): | |
| d_lat = deg_to_rad(lat2 - lat1) | |
| d_lon = deg_to_rad(lon2 - lon1) | |
| a = np.sin(d_lat / 2)**2 + np.cos(deg_to_rad(lat1)) * np.cos(deg_to_rad(lat2)) * np.sin(d_lon / 2)**2 | |
| c = 2 * np.arctan2(np.sqrt(a), np.sqrt(1 - a)) | |
| return EARTH_RADIUS_KM * c | |