Detailed boundaries for Maryland counties from Maryland iMap.
Format
A data frame with 24 rows and 6 variables:
statefpState FIPS code for Maryland
countyfpCounty FIPS code
nameCounty name
geoidUnique county GeoID (concatenation of state and county FIPS codes)
namelsadConcatenated variable length geographic area name and legal/statistical area description (LSAD)
geometryMultipolygon with the county boundary