Using a high-tech 3-D printer, a student and his professor created sophisticated braille maps to help blind and visually impaired people navigate a local training center. The new maps — made with state-of-the-art 3-D printers — are a little larger than a small computer tablet. They’re in a binder so people can easily carry them for reference. They also have a legend, or guide, in braille, a feature missing from previous maps.