fixed start date for Rockford, IL, added railroads using usgs topo
added segment of US 31 using Bing imagery, Wikipedia
extended, added railroads, highways in MN using Bing, USGS Topo, USGS 3DEP
extended, added railroads, highways in MN using Bing, USGS Topo, USGS 3DEP
added places in Wisconsin using USGS Topo, Wikipedia
extended, added railroads, places in MN using Bing, USGS Topo, USGS 3DEP
extended, added railroads, places in MN using Bing, USGS Topo, USGS 3DEP
extended, added railroads in MN using Bing, USGS Topo, USGS 3DEP
extended, connected up railroads in MN using Bing imagery, USGS 3DEP, USGS Topo
extended railroad using bing, usgs 3dep
connected up railroads using usgs topo
extended railroad using usgs topo, usgs 3dep
extended railroad in WI using Bing
extended railroad in WI using Bing
extended railroad in WI using Bing
cleaning up inadvertently double added rail lines
extended, connected up railroads in IL using Bing imagery