Surdex is one of largest in a team of ten companies that's assembling this atlas of American agriculture for the USDA. This year, it will process more than a hundred thousand images, covering ten states in the Midwestern and Northwestern United States.

NPR: Crop Cops Take to the Sky

In the United States, Northwestern University's Kellogg and Duke University's Duke Corporate Education are also among the leaders in "open" and "custom" programs devised for the specific needs of companies.

CNN: Costs vary with length, location