Iowa is certainly different, then again all States can and are different in some ways.
Canada makes it easy and while you can download free maps I have tons of paper maps and also pay for the software version of iHunter Ontario. It keeps you off the Reservations and private land and on Crown and public land.
The US for the most part uses Public Land Survey System and land is broken up in one mile squares. "Sections" of 640 acres. When I first moved here the first thing that struck me is that anything other than North\South and East\West roads upset the sensibilities of the good people of the Midwest. In South Dakota all section roads are public. And 21 yards to each side of the center line is public land, why many call pheasants ditch chickens in SD they hunt them along the ditches on section roads. Helps when the State doesn't cut the grass along the roads which most years they do not so it provides cover for birds. If it is a private offshoot from a section road they aren't usually shy about letting you know it.
That road leads into a full section, 1 mile x 1 mile (640 acres) and got to know Scott well he let us hunt there after getting to know him.
North Dakota isn't so generous and if posted a road is private. Until 2 years ago they are the first State in the Country to do electronic posting. And the system doesn't work as promised yet and I'll just leave it at that. And don't hunt ND anymore because of it. The other side of the Missouri is the start of the sagebrush sea and spent enough time in it no desire to go back.
Wi. is open if not posted. Well usually you have to use common sense just like any other place.
Mn. is open if not posted unless it is agriculture land. And tree farms count as ag lands. Not a problem in the Northern part of the State as most of it is public. Superior National Forest is 4 million acres alone and there is as much State and County public lands in the Arrowhead.
Entrance to a 10 mile long "road" that starts on County but crosses and turns into NF and State land. And they are serious about not suitable for passenger vehicles LOL.
If a State road is not open they let you know
Otherwise it is open for business
Many of those roads don't have signs anymore and some that do you can't even drive down them. I carry an electric chainsaw with me and will cut my way open if it isn't too bad. But I'm usually out to kill birds not play lumberjack. If there are enough downed trees I move on or head in on foot with the dog if I can park out of the way enough.
onX app works well for all States that I am aware for private\public land ownership. But Scout and Hunt Maps win by a mile for drilling down to any and all GIS data that is available. Down to moose trails which many of the old spur roads have turned into in the Arrowhead. Doesn't take mother nature long to claim back what was once and still is hers.