i was messing around with a bunch of astronomy planetarium and mapping software this evening and most of them needed exact latitude and longitude of your home to accurately map out the night sky. since i don’t own a gps unit i googled around and after forever and a day i found map o rama. you would think that most mapping sites would simply display the latitude and longitude of the source and destination but that would make to much sense. anyhow, just enter your address into map o rama and bam, you get the maps like the rest of the sites along with your latitude and longitude, enjoy.