Massachusetts and Neighboring State, USA The shapefile contains the following variables: 1. FID - Field identifier 2. OBJECTID - The unique ID for each record in the table 3. STATE_FIPS - Federal Information Processing Standard (state code) 4. STATE_NAME - State name 5. SQMI - State area in square miles 6. SHAPE - Type of coverage (i.e. Polgon) sOURCE: ESRI