These are the final versions of the classic USGS 24k topo maps that many people still consider the gold standard. In this video we test 100K US topo maps, 24K US topo maps. Both MS & BC both have their strengths and weaknesses, once you learn what they can and can't fo and how to use them to their fullest, you'll be stoked. GPS City is taking a look at how topo maps display on at outdoor, handheld GPS as opposed to the nuvi series of automotive GPS. It can display your trip in 3D contour maps. BaseCamp is very cool to export your ride from your unit to. Get used to using MapSource & BaseCamp, both avail for free from Garmin's site. Here is one that is snowmobile trails specific for Minnesota: I have the one for Washington and its way more detailed than Garmin's, if you want to get that fine of detail. Here's a good aftermarket TOPO for Minnesota. I tried to do a custom map and overlay my sled trails onto a TOPO Map, but the Rino's wont recognize them.only the Oregon's and Colorado's. You can find out more on these maps at by clicking here. It superimposes terrain shading from Garmin US TOPO 2008. If you want TOPO maps specific to snowmobile trails you need to get those from a local club that had them made for the area or search the web for a company who has made them for it. Note the trail detail in 100k, improved trail detail and stream data in US 24K and no trail or stream in map. TOPO US shows all the Forest Service roads and has the contour lines you are asking about. In MapSource you can also choose which areas you want to send to your Garmin, that way you dont have to load the entire US onto your unit and fill the memory.unless you have a big SD card and then you dont need to worry about it. Your best bet is the get the TOPO US 24K, $100, from Garmin, you can then access/view it in MapSource.
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