"HippoCampus is a project of the Monterey Institute for Technology and Education (MITE). The goal of HippoCampus is to provide high-quality, multimedia content on general education subjects to high school and college students free of charge.
HippoCampus was designed as part of Open Education Resources (OER), a worldwide effort to improve access to quality education for everyone. HippoCampus content has been developed by some of the finest colleges and universities in the world..."
"...the latest National Atlas includes electronic maps and services that are delivered online. We are using information presentation, access, and delivery technologies that didn't exist 30 years ago to bring you a dynamic and interactive atlas. But we have held fast to our tradition of producing the finest maps in the world. We think nationalatlas.gov™ is more useful than any bound collection of paper maps."
Work with multiple map layers