Excerpt from sheet 1 of USGS Open-File Report 2014–1214 produced by the California Seafloor and Coastal Mapping Program. This view shows color shaded-relief bathymetry (seafloor depth) offshore of Half Moon Bay, California, approximately 30 kilometers (20 miles) south of San Francisco.

Relief Shading

Caitlin Dempsey

There are different methods for achieving a shaded relief map and resources for understanding this cartographic technique are listed here.

Mapping the Earth – the Shuttle Radar Topography Mission

Caitlin Dempsey

Space Shuttle Endeavour lifted off on February 11, 2000 and one of its missions is an ambitious mapping of the earth.