US Geological Survey
Usgs: Pacific Seafloor Mapping Project
This site describes the details of a project to map the seafloor of the Pacific Ocean. Includes images, movies, links to related information, and more.
Stanford University
Stanford University Library: Hart Project
Explore the collection of 364 photographs which are plotted within this 3-D map experience recreating Alfred A. Hart's journey along the Central Pacific Railroad. The goal of his 1860s expedition was to solicit investment in the...
TeachEngineering
Teach Engineering: Air Pollution in the Pacific Northwest
Students are introduced to measuring and identifying sources of air pollution, as well as how environmental engineers try to control and limit the amount of air pollution. In Part 1, students are introduced to nitrogen dioxide as an air...
Curated OER
Educational Technology Clearinghouse: Maps Etc: The Isthmus of Tehuantepec, 1852
A map from 1852 of the Isthmus of Tehuantepec in Mexico, showing the proposed railroad route connecting the Gulf of Mexico and the Pacific. This was an alternative proposal to the construction of the Panama or Nicaragua canals, and was...
Curated OER
Etc: Proposed Isthmian Canal Routes, 1848 1884
A map of the proposed isthmian canal routes in Nicaragua and Panama between 1848-1884. The map shows the two chief proposals, the Nicaraguan from Greytown on the Caribbean to Lake Nicaragua and Brito on the Pacific, and the Panama...