Choropleth maps

• Maps of Oscar nominated movie trailer popularity
• How analysis based on ZIP codes in Flint MI masked clear patterns in lead contamination.
• Compare California counties to this Density plot of California
• Two resources for color scales: Color Brewer and Colorgorical

• Multiple asynchronous data loading.
• Geographic formats.
• Generation of path strings.
• Joining data across formats.

Data from USDA Atlas of Rural and Small-Town America.