matt on 08 Aug, 2018 02:44 AM
The OSM dataset does have a number of wilderness areas marked and those show up in the MapBuilder layer. The wilderness.net dataset may be more comprehensive, but it's a fair amount of extra work to take out-of-band info like that and patch it in every time I pull an OSM update.
Depending on where you live, the question of where snowmobiles are allowed is probably more complex than just national parks and wilderness areas, and subject to change from year to year. To get an accurate answer you really need to search for the USFS OSV (over-snow vehicle) use map for the area you're interested in.
You guys are great! Good info, thanks. The MapBuilder layer has a lot of good stuff, and I'll explore it more, but it appears to mostly not have the wilderness area boundaries in the areas I'm looking. The Wilderness.net data seems to be exactly what I want, and the source for kmz files is a great tip. I completely sympathize if it is extra work to try to get that into the Caltopo options. It does seem a little funky, or maybe just big, and more than my limited computer capacity can handle. I've crashed Caltopo a few times importing those files. But used judiciously, those files are the perfect answer to my question--just a couple of clicks and I can match up the boundaries with my existing waypoints, trail maps and so on in Caltopo. I'll check out the OSV maps sometime, too, for further info.
One thing you could try with the KMZs is to split them apart using Google Earth so each individual KMZ files have fewer areas. That should help get them imported into Caltopo. Then, once in Caltopo, resample them to have fewer points - no need to have that much detail.
BTW – Gaia exposes some of their layers as "map tiles", meaning they can be displayed in Caltopo using the “Add Custom Source” feature.
You would need to find the proper URL Template, which I won't share as I'm not sure if it would violate the terms of service...but it would look something like this (I found it using the "developer mode" in my web browser):