How are the map images created on my Neighborhood NFT?

The map image on your Neighborhood NFT is custom designed by Mapstone. The exact border shape is provided by the U.S. Census Bureau and is defined as a ZIP Code Tabulation Areas or ZCTA. A ZCTA is a geographic product of the U.S. Census Bureau created to allow mapping, display, and geographic analyses of the United States Postal Service (USPS) Zone Improvement Plan (ZIP) Codes dataset.