通过GeoCoder webservice 获取美国地址经纬度，邮编等，计算Google地图距离-GeoCoder webservice access through the latitude and longitude of the United States address, postcode and so on, calculate the map distance

基于vc++编程实现经纬度之间的距离求值，并按照范围输出符合条件的经纬度-Vc++ programming based on latitude and longitude values ​ ​ of the distance between the demand and output in line with conditions in accordance with the latitude and longitude range

由已知的经纬度求球面距离（采用UTM投影）(The distance of the sphere by the latitude and longitude)