A:AnswerHello,
The eTrex 10 doesn't have the option to add more detailed maps to the unit. You can download data like waypoints, routes, and tracks to the unit via BaseCamp.
Thank
Chris
A:AnswerHello,
With eTrex 10 you will not get any city street maps load on the device and unfortunately will not be able to add those maps to this device either.
Thanks
Chris
A:AnswerHi Ventura,
Yes, you could use a Garmin program call BaseCamp. You will be able to manage your data like waypoints, tracks, and route.
http://www.garmin.com/en-US/shop/downloads/basecamp
Thanks,
Chris
A:AnswerThe eTrex 10 is a device that is compatible for paperless geocaching. Most of our outdoor products are compatible. If you want a detailed breakdown between them please contact support in the following link so they can assist you with the device that fits your needs.
www.garmin.com/support
~JH