The ARC/INFO data transmitted to the Office of Planning contain information on the ahupua`a (traditional land division's) of O`ahu. The GIS representation of O`ahu ahupua`a is derived from information in an article by L. Snakenberg named "O`ahu Pre-Mahele Moku and Ahupua`a" published in "Historic Hawaii" Vol. 16, No. 6 (June, 1990). Earlier, in 1987 the Hawaiian Studies Institute of the Kamehameha Schools published a map illustrating the same material.
These are all unedited, draft versions current to January 1995. The projection is the Universal Transverse Mercator (zone 4), originally referenced to the Old Hawaiian Datum (Clarke 1886 Ellipsoid). (Note: converted to NAD83 datum in 2002). The USGS 7.5' quadrangle maps are the primary references for the lines used in the development of this data.