I use both Topo and City Navigator with my eTrex Vista Cx. I would assume that it works the same as for the 60csx. Although Topo has many streets and roads, it is not as detailed. Also, you cannot locate specific addresses with Topo, which you can do with City Navigator. And that comes in very handy sometimes!
Originally Posted by DEEZER
If you use autorouting with Topo maps loaded, you will get weird results, as it will try to take you on major roads the whole way. For example, when I was driving to the Conway County Event on Saturday morning, although I knew the way, I decided to see what auto-routing with Topo would come up with. Well, coming from Russellville, it wanted me to continue on I-40 to Conway, take Rt. 65 north, and then turn west somewhere along the way! Definitely not the short route! However, if I use City Navigator, auto-routing works great and the displayed route seems logical.
For the maps, I use 2 micro SD cards: one 2 GB card with City Navigator maps for the entire lower 48 states on it and one 64 MB card with topo maps for all of Arkansas, most of Mississippi, and the northern half of Louisiana. If I travel somewhere else, I will reprogram the 64 MB card with maps of the area I am going to. Then I swap cards depending on what I'm doing and what the area is like. I prefer the topo maps for geocaching, but I will use the City Navigator maps if I'm in an unfamiliar area.
Old River Runner
"Wildness is a necessity." -- John Muir
"When you go to hide a geocache, think of the reason you are bringing people to that spot. If the only reason is for the geocache, then find a better spot." – briansnat