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subdivision and within a quarter-quarter section were grouped together into one large parcel. ~he locally maintained road network was also not digitized, but rather, included in the acreage of adjacent parcels. ~his reduced the total ntm~er of parcels to about 2,900. An immediate data output of the digitized parcel base map was acreage measurements. ~he acreage measurements allowed compu- tation of such things as land value per acre, taxes per acre, or aggregated acreages by existing land use type. ~he digi- tized parcel base map also allowed mapping of any of the data in the parcel file IDeally Maintained Roads ~he center lines of the existing and proposed locally main- tained raod network were also digitized by LMIC. A file of parcels within about fifty feet of each center line, and the length of the frontage on each road was developed by LMIC by computer overlay of the road map on the parcel map. Codes were also added to the parcel file indicating whether the road was paved, gravel or proposed, and whether it was eligi- ble for state-aid maintenance or construction funding. Population and.H, o usi n~_.ilni.ts ~he allocation of population and housing units to parcels had several steps. First, the parcel addresses were address- matched to the Council's 1980 geographic base file (GBF), .which yielded the census block number in which the parcel was located. ~he parcel file with census block identifiers was analyzed along with the census files using several SAS pro- grams. Estimating the distribution of housing units was done first, based on the assessor's data for residential uses, fac- toring in unit counts for multi-family and mobile homes, and using tract statistics as oontrol-totals. Next, the population distribution was estimated and corrected using block statistics as control totals. Nearly 29 percent of the City's operating expenditures is for police protection; therefore, the distribution of police calls was a very important data need. Fortunately, the City had relatively good information on police calls by geographic area. Statistics on calls for the several major shopping cen- ters, mobile home parks and schools were individually recorded. For the remainder of the community, calls were re- corder on a quarter-section grid. A statistical analysis sys- tem (SAS) program was written and used to allocate calls to parcels based on attributes such as housing units or valuation, and using the quarter-section call totals as con- trols.