Layers:

92_1.2D
carthage-1991-mmp
grid-100-mmp
lake-1991-mmp
modern-1991-mmp
mounds-1938-mmp-1m
mounds-1969-usgs-1m
mounds-1991-mmp-1m
mounds-1995-vjk-1m
ponds-1991-mmp
river-1991-mmp
swamp-1991-mmp
topo-1969-usgs-1m-x
topo-1969-usgs-3m
topo-1969-usgs-3m-b
topo-1991-mmp-1m-all
topo-1991-mmp-1m-plaza
trails-1970-mmp
trees-1991-mmp
