This post also has a nice rule of thumb that 111,111 * cos(latitude) meters is 1 degree of longitude. I like the correction! In practice you can use some simple

This post also has a nice rule of thumb that 111,111 * cos(latitude) meters is 1 degree of longitude. I like the correction! In practice you can use some simple constants; 25° is about 100,000 meters. 44° is about 80,000 meters. 57° is about 60,000 meters.