We live on a blue planet, with oceans and seas that cover more than 70% of the Earth's surface. The oceans feed us, regulate our climate, and generate most of the oxygen we breathe. Approximately 37% of the world's population lives within 100 km of the coast. (UNEP)

CWAs are "...collections of digital maps and datasets with supplementary tables, illustrations, & information that systematically illustrate the coast, oftentimes with cartographic & decision support tools, all of which are accessible via the Internet."  O'Dea et al., 2007