"Open Educational Resources" by Ron Mader is licensed under CC BY 2.0
OER are teaching, learning, and research resources that reside in the public domain or have been released under an intellectual property license that permits their free use and re-purposing by others. ~ William & Flora Hewlett Foundation
For a more comprehensive overview on OER, see:
"Plains" by Peter Halling Hilborg is licensed under CC BY 4.0
This is a sample of several OER Land Surveying & Geomatics textbooks and course materials available. Additional OER may be found by searching the resources listed on the ACC Libraries primary Open Educational Resources Guide.
Sample 1: Nature of Geographic Information Systems (Open Textbook Library)
Sample 2: Topographic Change (OER Commons)
Sample 3: Best Practices for Minimizing Errors during GNSS Data Collection (OER Commons)
Sample 4: Land Use History of North America (OER Commons)
Sample 5: Precision and Accuracy in Geodetic Surveying (OER Commons)