I am thinking of buying an etrex Venture HC, with the built in 24M bytes of memory. Also, the 24K US Topo DVD for the Southwest US.
What I need to know is how many square miles worth of 24K map will this unit hold? I may want to download the topos for an area 50 miles x 50 miles (that's 2500 square miles). Is the 24 M bytes big enough for that? How much memory does each square mile of map require?
I am trying to be a cheapskate and not buy a unit that you can add more memory to.
Thanks for any help.