This class can be used to calculate the air distance between two cities. It calls the Google Maps API to obtain the latitude and longitude of the cities given their names. The class uses the retrieved locations to compute the air distance between the cities. Thi class can be used to calculate the air distance between cities. It uses the Google Maps API to find the geographical points of the city and calculates the distance between them. For multiple calculations, you can define a center city and then calculate the distance around this. This minimizes the access of the Google MAps API There is also a method to find if a city in question is within a certain distance arounda center city. The distance results may be retrieved in .