https://www.bostonplans.org/3d-data-maps/map-library/zoning-maps
Zoning Maps | Bostonplans.org
Find traditional maps and links to dynamic GIS applications.
zoning maps
https://opendata.cityofnewyork.us/projects/customizing-zoning-maps/
NYC Open Data - Customizing Zoning Maps
NYC Open Data helps New Yorkers use and learn about City data
nyc open datazoning mapscustomizing