To view the locations of resources as well as neighboring bases and zombies on the world map you need to tap the 'World' button that is situated on the lower right corner of your screen. The main resources in Last Shelter Survival are Food, Water, Fuel, Wood, Iron, and Electricity and they are required in building, researching, marching, and upgrading. The following list tells you where you can get each of these resources.
Food
Farm (near rich soil)
Water
Water Filter (near water source)
Iron
Refinary (near iron deposit)
Fuel
Oil Well (near Oil deposit)
Electricity
Wind Turbine, Power Plants
Lumber or Wood
Lumber Mill (near logging site)
These production facilities cannot be built freely on the base, you have to build them near the indicated source. A lumber mill for example can only be built near a logging site.