What is Sketch Maps?
Sketch Maps meaning A sketch map is an illustration of a proposed change to the Zoning Map or the City Map that provides a graphic, easy to read version of the change. The sketch map is attached to the Notice of Certification (NOC) when an application for a Zoning Map or City Map change is certified as complete by the Department of City Planning and distributed for public review. Sketch maps are limited in scope and scale to include only the area affected by the proposed action and do not necessarily reflect the final action.
reference: Glossary of Planning Terms – NYC Planning