By Jay Bowen - GIS Specialist, The Digital Scholarship & Publishing Studio, The University of Iowa Libraries The BTAA Geoportal has a wealth of interesting and beautiful historic scanned maps available to the public to download. Recently, I discovered John Henry Renshawe's shaded relief maps of US national parks from the early 1900s. Using his Panoramic View of the Yosemite National Park, California from 1914, I wanted to demonstrate an open-source technique for adding three dimensionality to these fantastic relief maps. Download and Georeference the JPG File The first step is to download the map here and load it into a georeferencer tool in your favorite GIS software. While I find georeferencing in ArcGIS Pro to be an intuitive breeze, I used the Georeferencer tool in QGIS to keep with an open-source and MacOS-oriented workflow. You can do a lot of amazing GIS work in the comfort of your home with a MacBook! As shown in the screenshot above, I rubbersheeted the ...
By Danny Dotson, Head - Orton Memorial Library of Geology & Gardner Family Map Room; Mathematical Sciences Librarian & Science Education Specialist at The Ohio State University Earlier this year, the University Libraries was presented with a need for maps of an Appalachian region. The goal was to find maps of parts of this region over a period of time to see how the topography changed due to mining. Information and visual representations derived from these maps were integrated into the exhibition Jonas N.T. Becker: A Hole is not a Void . This project involved identifying maps that could meet the artist’s needs. This involved first identifying items in the catalog that could potentially fit and pull these maps. Since many of the maps were USGS maps, there were quite a number of maps pulled for further review. The artist worked with staff and student workers at the Orton Memorial Library of Geology to give them specifics of their need, and some of our student wo...