Was having a read on the lowrance site and they offer a service to be able to create maps based on your sounder log. Apparently you can cruise around on a nice day, and the upload your sonar logs and it maps out the bottom. Just wondering what level of detail it returns?

I figure it would be useful to identify the boundaries of several offshore reefs we like to fish, making it much easier to set up a drift along the edge.

Any thoughts?