task 1 and 2

III/Ovodas/task2_4.py

@@ -0,0 +1,40 @@
+#!/usr/bin/python3
+
+import csv
+from math import sin, cos, acos, radians, degrees, atan
+
+from consts import phi_1, lambda_1, phi_2, lambda_2
+
+
+# krasovskio
+kr = {}
+with open("krasovskio.csv") as f:
+    for row in csv.DictReader(f):
+        kr[float(row['phi'])] = {k: float(v) for k, v in row.items()}
+
+
+def sec(x):
+    return 1/cos(x)
+
+
+# konstantos/radianai
+midphi = (phi_1+phi_2)/2
+rphi_1, rphi_2 = radians(phi_1), radians(phi_2)
+rlambda_1, rlambda_2 = radians(lambda_1), radians(lambda_2)
+
+# ortodroma
+rdelta = acos(sin(rphi_1)*sin(rphi_2) + cos(rphi_1)*cos(rphi_2)*cos(rlambda_2-rlambda_1))
+delta = degrees(rdelta)
+R = 6366255.58  # rutulio spindulys iš pavyzdžio
+ortodromos_ilgis = rdelta * R
+
+# loksodroma
+D_1 = kr[phi_1]["D"]
+D_2 = kr[phi_2]["D"]
+ralpha_loks = atan(60*(lambda_2 - lambda_1) / (D_2 - D_1))
+
+loksodromos_ilgis = (rphi_2 - rphi_1) * kr[midphi]["R"] * sec(ralpha_loks)
+
+if __name__ == '__main__':
+    print("Ortodromos ilgis (m): %d" % round(ortodromos_ilgis))
+    print("Loksodromos ilgis (m): %d" % round(loksodromos_ilgis))