FIGURE 3.1 Relationship of the National Spatial Data Infrastructure (NSDI), the enhanced National Atlas, The National Map, and other components. The NSDI provides the umbrella of data standards, prototcols, partnership arrangements, interagency cooperation, and data. Within this lie the enhanced National Atlas and The National Map. Their overlap represents the processing (generalization) of the large-scale information into the enhanced National Atlas and the filling of “holes” in the patchwork quilt National Map with atlas data when no local data exist.

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