cadastral map; plat map; lot map
A map showing land parcels, boundaries, and lot numbers, used in real estate, surveying, and municipal records.
A cadastral map is required for real estate registration.
You can view the plat map at the city hall.
公図 is an official cadastral map kept by the Legal Affairs Bureau, often used interchangeably with 区画図 in legal contexts.
Compound of 区画 (くかく, 'division, section') and 図 (ず, 'map, drawing').