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| UScensus2000-package | Helper functions for the UScensus2000-suite of packages |
| areaPoly | Area of the polygons in SpatialPolygonsDataFrame |
| city | Selects one or more CDP(s) from a given state |
| county | Selects one or more counties in a given state |
| countyfips | County FIPS codes |
| demographics | Selects a specified demographic meta-data from the sp objects. |
| MSA | Selects one MSA from a given state. |
| MSAfips | MSA FIPS codes |
| MSAnames | MSA Names and FIPS codes |
| poly.clipper | Selects the block, block group, or tracts which are contained within a given CDP. |
| states.names | States Names |
| states.names.cap | States Names Capitalized |
| UScensus2000 | Helper functions for the UScensus2000-suite of packages |