The data would be extracted based on user specified coordinates. One complication with this approach involves providing complete and accurate metadata for uniquely defined areas of multiresolution data. One potential solution is to include detailed individual headers for each subcomponent of the data set with a generic header, perhaps describing nothing more than the geographic extent and minimum accuracy for the composite data set. As this modernization effort matures, this issue will be resolved. Other mapping organization data can be used.
Current users are accustomed to the present format.