Is there any resource online for determining exact latitude & longitude?
It depends upon the clarity of the satellite photo over your location. For example, with Google Earth’s download, I can get the exact lat. & long. of my front porch with the pointer. The photo details are so clear, you can even tell that my wife was sunning herself in the back deck lounge chair. But that’s just my property. I’ve used Google Earth for other locations, and cannot get a view “low” enough or detailed enough to do that. It sounds like that might be your issue. If you haven’t downloaded it, and just used online-hosted sites, download Google Earth. Details below. I’ve used it for mapping out routes for kiteboarding, etc. You can see the differences I am talking about by looking at some pictures from my web site. Some locations are fuzzy and indistinct beaches. Others, you can see the details of the sand dunes on. It just depends. I am not sure if it is cost prohibitive or not, but you could always get a handheld, cheapo GPS and stand by the door. I carry 2 cheap Magellan GPS’
