land parcel tier
The lowest tier, holding the individual plot as the land register records it.
The land parcel tier is the bottom of the region hierarchy. It holds the individual plot: one entry in the land register, one owner, one boundary that a survey established.
Nothing is subdivided below it in this model. A building standing on the parcel is a structure rather than a region, and the parcel is where the geography stops and the property begins.
The block containing it is the tier above.
