Refer to the section on the border group data.frames for a detailed discussion on the formats and usage of each of the above data.frame.
In this border group, there are 51 areas (states and DC) and information and names in the areaNamesAbbrIDs data.frame and there boundaries in the areaVisBorders data.frame. The L2VisBorders data.frame contains a copy of the areaVisBorders data.frame to allow heavier overlaying of the state and DC boundaries during mapping. The RegVisBorders data.frame contains the information and boundaries for the 4 U. S. census regions. The L3VisBorders dataset contains the information on the boundaries of the U.S.
Alaska and Hawaii are relocated to below California and Alaska is reduced in size by 50
The names, abbreviations, id, and assigned U. S. regions used in the areaNamesAbbrsIDs data.frame the the 50 U. S. States and DC are as follows:
| name | ab | id |
| region | Alabama | AL |
| 01 | South | Alaska |
| AK | 02 | West |
| Arizona | AZ | 04 |
| West | Arkansas | AR |
| 05 | South | California |
| CA | 06 | West |
| Colorado | CO | 08 |
| West | Connecticut | CT |
| 09 | NorthEast | Delaware |
| DE | 10 | South |
| DC | DC | 11 |
| South | Florida | FL |
| 12 | South | Georgia |
| GA | 13 | South |
| Hawaii | HI | 15 |
| West | Idaho | ID |
| 16 | West | Illinois |
| IL | 17 | MidWest |
| Indiana | IN | 18 |
| MidWest | Iowa | IA |
| 19 | MidWest | Kansas |
| KS | 20 | MidWest |
| Kentucky | KY | 21 |
| South | Louisiana | LA |
| 22 | South | Maine |
| ME | 23 | NorthEast |
| Maryland | MD | 24 |
| South | Massachusetts | MA |
| 25 | NorthEast | Michigan |
| MI | 26 | MidWest |
| Minnesota | MN | 27 |
| MidWest | Mississippi | MI |
| 28 | South | Missouri |
| MO | 29 | MidWest |
| Montana | MT | 30 |
| West | Nebraska | NE |
| 31 | MidWest | Neveda |
| NV | 32 | West |
| New Hampshire | NH | 33 |
| NorthEast | New Jersey | NJ |
| 34 | NorthEast | New Mexico |
| NM | 35 | West |
| New York | NY | 36 |
| NorthEast | North Carolina | NC |
| 37 | South | North Dakota |
| ND | 38 | MidWest |
| Ohio | OH | 39 |
| MidWest | Oklahoma | OK |
| 40 | South | Oregon |
| OR | 41 | West |
| Pennsylvania | PA | 42 |
| NorthEast | Rhode Island | RI |
| 44 | NorthEast | South Carolina |
| SC | 45 | South |
| South Dakota | SD | 46 |
| MidWest | Tennessee | TN |
| 47 | South | Texas |
| TX | 48 | South |
| Utah | UT | 49 |
| West | Vermont | VT |
| 50 | NorthEast | Virginia |
| VA | 51 | South |
| Washington | WA | 53 |
| West | West Virginia | WV |
| 54 | South | Wisconsin |
| WI | 55 | MidWest |
| Wyoming | WY | 56 |
| West | name | ab |
All data must be tagged with the name, abbreviation or id strings to be able to find the associated boundaries information. With the USStatesBG only, the package will accept several variations on the full name for DC. They include: Washington, D.C., District of Columbia, and D. C. All can be with or without punctuation and upper and lower case. When detected, the name is translated to "DC".
The dataRegionsOnly call parameter can be set to TRUE to request the package to limit the mapping to only states in regional areas where data is being mapped and omit states and regions that do not contain data. This allows the caller to focus the micromaps on one of the four (4) census regions: NorthEast, South, Midwest, or West.
The rowNames = alias, rowNames = alt_ab are not support in the USStatesBG border group.