1. A method of generating linkcells for use in retrieving site data pertaining to one or more sites of a plurality of sites in a site set, wherein each site in said site set is located in a location space, wherein site data pertaining to sites in said site set is contained in a site data repository, and wherein said method comprises the steps of: (a) partitioning said location space into a plurality of cells; (b) associating each site in said site set with one of said plurality of cells; (c) defining a plurality of linkcells, wherein said plurality of linkcells is a subset of cells in said plurality of cells, and wherein each of said plurality of linkcells has at least one site associated therewith; (d) assigning a cell identifier to each of said plurality of linkcells; (e) linking a data table to each of said plurality of linkcells; and (f) for each of said plurality of linkcells, storing site data pertaining to all sites associated therewith in the data table linked thereto.