Topography is the detailed shape and features of the land's surface. When you look at a landscape, topography describes whether it's flat or hilly, where the valleys dip down, where the mountains rise up, and how steep the slopes are.

Geographers and mapmakers study topography to understand and show the physical features of an area. A topographic map uses special lines called contour lines to show elevation: where the lines bunch close together, the land is steep, and where they spread apart, the terrain is gentler. These maps help hikers plan routes, engineers design roads, and scientists understand how water flows across the land.

A region's topography affects everything from which crops farmers can grow to how cities develop. A mountainous topography might mean winding roads and scattered settlements, while flat topography often leads to grid-like streets and sprawling towns. Understanding topography means understanding how the shape of the land influences the way people live on it.