Featuring real-world examples from the ocean trenches, this collection of articles by leading ocean researchers and marine biologists shows some of the many ways that GIS technology is contributing to our understanding of the underwater environment. From improving oil spill response and mapping marine biodiversity to protecting at-risk coastal areas and improving navigation safety in crowded sea-travel corridors, "Marine Geography: GIS for Oceans and Seas" illustrates how digital mapping and spatial analysis can serve as the integrating technology that allows various stakeholders to communicate in a common language.