Cadastral Map
An official legal ID card for land, precisely mapping every parcel's borders and identification numbers.
Definition A cadastral map is an official public map created by the government through precise land surveys to document the exact boundaries, shapes, parcel numbers (lot numbers), and designated land-use categories of every piece of real estate. Just as a birth certificate or ID card verifies a person's legal identity, a cadastral map serves as the foundational document proving the official legal boundaries of every single parcel of land.
How Is It Different from Navigation Maps?
The maps we use every day on smartphones or GPS devices are designed for navigation. They clearly display building exteriors, roads, and points of interest, but they cannot show where legal property lines actually begin and end.
In contrast, a cadastral map divides an entire nation's land into a giant puzzle of individual parcels (called *pilji* in Korea). Each parcel is assigned a unique lot number (*jibeon*) and a designated land-use category (*jimok*), such as farmland, residential lot, or forest.
Even if a fence or wall stands between your yard and your neighbor's property, the true legal standard is not the physical wall you see, but the boundary line drawn on the cadastral map. It is not a snapshot of scenery, but an exact legal blueprint of property ownership.
A Closer Look: Title Deed vs. Cadastral Map
When researching real estate, you are often advised to check both the title registry (deed) and the cadastral map. Each document plays a distinct role. A title registry primarily records legal rightsโsuch as who owns the property and whether there are active bank mortgages or liens against it.
On the other hand, cadastral records reflect physical reality: where the land is located, its shape, and its boundaries. If the surface area listed on a title deed conflicts with the official cadastral survey, the cadastral record takes legal precedence regarding physical facts.
Cadastral maps are also drawn to precise scales, such as 1:500 or 1:1,200. Because the land is reduced mathematically by an exact ratio, measuring lines on the map allows you to calculate the precise real-world dimensions and width of a property.
Why Check It First Before Buying Land or a Home?
Buying countryside land or building a home without checking the cadastral map can lead to costly mistakes. The most famous danger is buying a 'landlocked parcel' (*maengji*). A landlocked parcel has no direct contact with any public road; even if you see a dirt path in person, you cannot legally use it if the cadastral map shows it crosses private land.
It is also surprisingly common to discover that a yard you have used for decades actually belongs to your neighbor according to the cadastral map. Fences and trees can be placed incorrectly by previous owners, but government-registered boundary lines cannot be changed at will.
That is why before signing a real estate contract, you should never rely solely on a visual site visit. Always request a cadastral map through government public record services to ensure that the physical property aligns perfectly with the official survey.
๐ค Common misconceptions
A physical fence on the property always matches the cadastral map's boundary.
Fences are often built in the wrong spot by human error. Legal property boundaries are always judged by the government-certified cadastral map, not by existing fences on site.
๐งบ Where you meet it
A cadastral map is an official identity document for land, precisely recording the shape, lot number, use category, and legal boundaries of every parcel.