HMR said:
...On my computer I have 3-4 different waypoint databases (a MapSource file with only waypoints). One holds local POI's, another contains all Alp passes, etc.
HMR:
Why don't you just use the 'categories' feature of MapSource to assign each waypoint to a different category? If you do that, then you can choose to view only waypoints from each category on both your GPSR and when using MapSource.
I do exactly that - I have 5 categories of waypoints: North America, Europe, Africa, Asia, and Motorcycle. If I am in Africa (as I am now), only the African waypoints show up when I do a find or construct a route, because I select the 'Africa' category as the active one. When I go back to Europe, I switch over to the Africa category. This way, I can keep everything in one place (one file), and I don't have to worry about duplicates, getting out of date, not having the waypoints loaded, etc.
Concerning routes - if you frequently and repetitively use the same routes over and over, maybe it might make sense to keep multiple files. However, I think most of us ride a route once, and then file it away for future reference (historical record). This can be done by just downloading the contents of the GPSR (waypoints, routes, maps and tracks) and saving them in a file called 'GPSR Download May 23 2006' or similar. Once we have done that, we can then erase the route from the GPSR itself if we don't plan to use it again in the near future - but we still have it on our computer if we want to either re-use it or refer to it again.
If you do have a need to store many routes on your GPSR (for example, off-road routing), just preface the route name with a number or a letter that will cause both MapSource and the GPSR to sort the routes alphabetically. For example, if you have a library of 30 favourite off-road routes that you want to have available, preface each route name with N, S, E, or W, followed by a space, to indicate where it is in reference to your home base. Both MapSource and your GPSR will then sort them for you alphabetically (E-N-S-W) when you display the route list - that will help you find the one you want faster, and avoid confusion.
I cannot figure out the reason why you state
'Never store anything whatsoever (except maps & POI's) in the unit itself.' Do you mean 'Don't use your GPSR for long term (archival) storage of routes and tracks? If so, that makes sense, because if the route memory becomes cluttered with routes you don't need, it will slow you down when you try to find the route you want. But, there is no valid engineering reason to support your statement... from purely an engineering point of view, you can store as much crap as you want on your GPSR. Heck, I sometimes transfer pictures (JPEGs) from my Sony camera into my GPSR just to empty out the memory of the camera when it gets full!
Michael