wget -r -A.tiff url

sed 's/^/http:\/\/www.cs.toronto.edu\/~vmnih\/data\/mass_roads\/train\/sat\/&/g' test.txt

vim list.txt

:

%s/^/http:\/\/www.cs.toronto.edu\/\~vmnih\/data\/mass_buildings\/train\/sat\/&/g

%s/^/http:\/\/www.cs.toronto.edu\/\~vmnih\/data\/mass_buildings\/train\/map\/&/g

%s/^/http:\/\/www.cs.toronto.edu\/\~vmnih\/data\/mass_buildings\/valid\/sat\/&/g

%s/^/http:\/\/www.cs.toronto.edu\/\~vmnih\/data\/mass_buildings\/valid\/map\/&/g

%s/^/http:\/\/www.cs.toronto.edu\/\~vmnih\/data\/mass_buildings\/test\/sat\/&/g

%s/^/http:\/\/www.cs.toronto.edu\/\~vmnih\/data\/mass_buildings\/test\/map\/&/g

:wq