The 7SDD has two GPX file types that could helps with this.
1. Ride Command calls them areas, GPX standards call it geofence.
It takes a 2 dimensional form, that does not cross over itself, and uses Latitude and Longitude pairs to define that geofence. Polaris limits these areas to having no more than 24 pairs / corners. It shades the inside of this area, when presenting them on the screen.
2. Ride Command calls these Routes / planned rides, GPX standards call them tracks.
There is no practical limit to how many Latitude and Longitude pairs / corners these may have, but all pairs are connected by a track line, in the same order that the pairs are in the file. The first and last locations can touch, or just be a big crooked line that can cross itself.
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When creating or editing, I would suggest turning off in the Layers or Tools option of Ride Command, Trail Conditions, Heatmap and Snow Depth, and unless you need it, turn off Satellite and Landowner Info also. It will make the screen less busy and improve response time, as you move around. I use a distinctive color, such as yellow so they will not be confused with trails or recorded rides, or the current ride.
Ride Command can create/edit Areas and Planned Rides/routes with a Web Browser running on a PC, or by a Smartphone using the Ride Command app with an internet connection. It is MUCH easier to do it on a PC, then on a Smartphone. If creating a route, turn off the option for Snapping to a trail, unless the trail IS on the boundary that you want.
The 7SDD can either be synchronized thru internet access after logging in to the Ride Command cloud, and downloal or all, or selected areas or routes. The Areas and/or Planned Routes can be placed onto USB flash drive, via a PC. A USB flash drive can also import export from the Ride Command cloud thru a Smartphone using a Web Browser, and a hybrid Flash Drive with USB and Smartphone plugs on it.
I have attached a Collection of 3 Areas created by Ride Command, of the Southern half of Deschutes National Park.
Due to forum limits, I named it a .txt file extension, you will need to rename it to a .gpx file extension before importing/uploading it to your Ride Command cloud or putting it on a USB flash drive to load into the 7SDD, with the Feb. 2024 version of Software.