Unit times and unit costs for initial and ongoing property mapping and parcel indexing have been established from time/task and expenditure records at the regional office of LRIS in Bathurst from June 1, 1979, the date it was opened, to March 31,1986. During the first five years of this period, the initial property mapping and parcel indexing for the 108 000 parcels in Restigouche, Gloucester, and Northumberland counties was completed; during the latter two years of the period the property mapping and parcel indexing were kept up-to-date by incorporating the results of the 24 953 changes that occurred. Person time was normalized to the Property Mapper I level, and expenditures were converted to 1981 Canadian dollar equivalents. The time, 93 minutes, required to make each change was somewhat less than the time, 108 minutes, for the initial property mapping and parcel indexing; similarly, the unit cost per change, 1981C$17.63, was less than the cost, 1981 C$26.95, for the initial compilation.