Topographic map

http://www.mapsofworld.com/usa/topographic-maps/california-topo-map.html

This map is a topographic map of the state of California and is very helpful because it gives more than just the simple x-y coordinate system of most two dimensional maps, it actually shows relief and elevation throughout the state. In this specific map, it is seen that California has a very large range of elevations, probably ranging from high mountain tops, to low lands near the shore. There are a number of reasons why topographic maps are important but a few reasons include plans for building, military operations, mining, and for general use of the land.