地图上的长度单位换算Python

在Python中进行地图上长度单位的换算，通常涉及到的是距离单位的转换，比如从公里(km)、米(m)到英里(mi)，或者海里(nautical miles)等。常用的库如`geopy`可以方便地处理这类地理信息操作，包括度数到距离的转换。下面是一个简单的例子：

from geopy.distance import distance

# 定义千米和英里的转换率
KILOMETERS_TO_MILES = 0.621371
METERS_TO_KILOMETERS = 1 / KILOMETERS_TO_MILES

def convert_distance(distance_in_km, to_unit):
    if to_unit == 'mi':
        return distance_in_km * KILOMETERS_TO_MILES
    elif to_unit == 'km':
        return distance_in_km
    else:
        raise ValueError(f"Unsupported unit: {to_unit}")

# 示例
distance_in_meters = 1000
converted_distance_to_km = convert_distance(distance_in_meters, 'km')
converted_distance_to_mi = convert_distance(distance_in_meters, 'mi')

print(f"{distance_in_meters} meters is equivalent to {converted_distance_to_km:.2f} kilometers or {converted_distance_to_mi:.2f} miles.")