I go hunting here and someone put up all kinds of "No Tresspassing" signs, I think this is public land and it is just some other hunter trying to keep competioion out but I want to make sure. The property lines are key. The place is in Webster County, Iowa
First one that shows me the map I will give you "Best Answer"
Go to your city’s website and find out if it has a zoning ordinance map. Usually in the planning department websites in California cities. This will help to map the property line.