Therefore, in order to address these concerns, the current committee carefully analyzed the logical flow of parcel data in a nationwide federated model (Figure 6.1).

This model provides the core of the committee’s vision of how a unified and nonredundant parcel system would operate. It recognizes that parcel data are created and maintained by several public entities. Each of these organizations has a recognized legal mandate to produce parcel data and a set of related attributes. For example, local governments produce parcel data to support the administration of property taxes while other levels of government need an accurate representation of their interests and rights relating to property they own or manage. While private firms involved in real estate and insurance may produce parcel data for their own internal business needs, these data are not considered part of a national system. In fact, one of the goals of the national system would be to encourage private firms to utilize and financially support the public sector parcel data system.

The model identifies an important role for parcel data coordinators at the state and federal government levels and a coordinator to deal with the special needs associated with Indian lands. These coordinators would assemble and reconcile parcel data from the relevant parcel data producers. For example, a state coordinator would deal with edge-matching parcel boundaries along county boundaries and inserting and reconciling state-owned lands with privately owned land. In fact, several states already have such coordination offices. The federal land parcel coordinator would specifically deal with inventorying and managing the geographical representation of all property managed by the federal government. The Indian lands coordinator would work with tribal governments, Bureau of Indian Affairs, and Office of the Special Trustee to reconcile the parcel data for tribal and Native lands. This position will be particularly tasking because it will often require determining which of the above organizations’ data to use, since there is a great amount of duplication and variation between organizations. There is also a need for a national land parcel coordinator, who would have the ultimate responsibility of creating wall-to-wall coverage of land parcel data across the United States. The national coordinator would be the conduit for a diverse user community to access a trusted and authoritative representation of all land parcels. Technically, all adjustments to parcel data made by coordinators at any level would be maintained with appropriate digital time stamps that

FIGURE 6.1 Flow of parcel data from producers to a national system. NOTE: BIA = Bureau of Indian Affairs; GSA = General Services Administration.



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