Presentation Links

Academic Research

• Google Scholar
• Microsoft Academic Search
• ERIC

Symbols and Icons

• AutoDraw
• AIGA symbols and icons (free use)
• Unicode characters
• The Noun Project (icons)
• ISO safety signs
• Amp-What (Unicode and other character search)

Images

• Library of Congress
• Library of Congress: Free to use/public domain
• Library of Congress: Historic American Engineering Record
• Getty public domain images
• National Park Service: Heritage Documentation Programs
• National Map
• National Map viewer
• Iowa Geographic Map Server
• Internet Archive: Images
• Library of Congress: Classic maps
• Archive.org: Images
• Chronicling America (historic newspaper search)
• Smithsonian Open Access
• British Library (out of copyright)

Data Sources

• USDA aerial mapping
• Census Bureau: American Fact Finder
• Census Bureau: Community facts
• CIA World Factbook
• FRED
• Iowa Data Center
• OECD data
• PubChem (chemicals, hazards, etc.)
• World Bank
• National Historical Geography Information System
• Atlas of Historical Geography of the United States

Color codes

• ◩ Safety orange: #ff5f15
• ◩ Safety yellow: #eed202
• ◩ Safety green: #006b46
• ◩ Safety fluorescent yellow: #edff00
• ◩ Safety neon green: #99ff00
• ◩ Ivory: #fffff0
• ◩ Pearl: #fcfcf7
• ◩ Marble: #f2f8fc
• ◩ Off-white: #faf9f6
• ◩ Lavender: #f4f1f8
• ◩ Alice blue: #f0f8ff
• ◩ Parchment: #fbf5df
• ◩ Cold steel: #f8f7f4
• ◩ Eggshell: #fdfdfd