Answer to Question #268344 in Python for Bayernmunich

Question

Find latitude and longitude of first 20 countries with a population greater than or equal to the population limit given below. Use the country details from this dataset.

Your task is to find the sum of the length of all lines (in kms) that can be drawn between co-ordinates of these countries.

Assume radius of earth: 6371 km

Round length of each line and final result to 2 decimal points

If co-ordinates are missing for any country use 0.000 N 0.000 E

Population limit: 300

Note: Population limit will change at random intervals.

Answer:

Answer 1

from math import radians, asin, sqrt, cos, sin


def distance(lt1, lt2, lg1, lg2):
	lon1 = radians(lg1)
	lg2 = radians(lg2)
	lt1 = radians(lt1)
	lt2 = radians(lt2)
	dist_lon = lg2 - lg1
	dist_lat = lt2 - lt1
	res = sin(dist_lat / 2)**2 + cos(lt1) * cos(lt2) * sin(dist_lon / 2)**2
	ct = 2 * asin(sqrt(res))
	
	radius = 6371
	return(ct * radius)
	


lt1 = eval(input("Enter first latitude: "))
lt2 = eval(input("Enter second latitude: "))
lg1 = eval(input("Enter first longitude: "))
lg2 = eval(input("Enter second longitude: "))
print(distance(lt1, lt2, lg1, lg2), "KM")