A measure of the intensity of land use within the CBD. The total floor area of all storeys of a building is compared with the ground-floor area of the building under consideration. The higher the index, the more intensive the urban land use. The index can also be used to delimit the CBD. Nahm (1999) GeoJournal 49, 3 notes that the CBHI increased fourfold in Seoul, 1953–98.