Bubble Map / Proportional Symbol Map
Figure 2. in Pathways for Building Fire Spread at the Wildland Urban Interface. Gollner, Michael et.al Available in ResearchGate https://www.researchgate.net/figure/Map-of-structures-lost-to-wildfire-in-the-United-States-between-1999-2011-Data-are_fig2_276276817
Drzyzga, S. (2009).Prevalence of Foodstamp Use. https://www.flickr.com/photos/sadrzy/4154089647 CC BY-NC 2.0
Traffic flow of freight road transport in the USA, 2015. https://ops.fhwa.dot.gov/freight/freight_analysis/nat_freight_stats/nhsavglhft2015.htm. public domain.
Featured Map: Breeze Airways. Great Circle Mapper. http://www.gcmap.com/featured/20210527.
A bivariate dot density map showing the distribution of the African American and Latino populations in the contiguous United States in 2010.
Bplewe. https://commons.wikimedia.org/wiki/File:Dot_map_black_hispanic.png . Creative Commons Attribution-Share Alike 4.0 International.
USDA Plant Hardiness Zone Map. https://planthardiness.ars.usda.gov/PHZMWeb/Default.aspx
Transit Map / Subway map / Tube map
Istanbul Rapid Transit Map with Metrobüs. Maximilian Dörrbecker (Chumwa) . https://commons.wikimedia.org/wiki/File:Istanbul_Rapid_Transit_Map_with_Metrob%C3%BCs_(schematic).png . Creative Commons Attribution-Share Alike 2.5 Generic
Fayetteville Quadrangle, Arkansas. 1:24,000. 7.5 Minute Series. Washington D.C.: USGS, 2011 in Rome of the Ozarks. Sara Burningham. KUAF. https://www.kuaf.com/post/rome-ozarks#stream/0.
pH of rainfall in the USA, 2002 https://www.usgs.gov/media/images/ph-rainfall-usa-2002