anchor.diff:  HANCOCK,Hancock Police Department,16000US2436600
   HARFORD,Harford County Sheriff's Office,
   HAVREDEGRACE,Havre De Grace Police Department,16000US2437600
  -HOCPD,Howard County Police Department,
  +HOCPD,Howard County Police Department,05000US24027
   HURLOCK,Hurlock Police Department,16000US2441125
   HYATTSVILLE,Hyattsville City Police Department,16000US2441250
   KENT,Kent County Sheriff's Office,
  
positive.code: OCEANPINES,Ocean Pines Police Department,
  OXFORD,Oxford Police Department,16000US2459450
  PERRYVILLE,Perryville Police Department,16000US2461150
  PGCOPD,Prince George's County Police Department,
  PGCOSHERIFF,Prince George's County Sheriff's Office,
  PGPARK,PGPARK,
  POCOMOKE,Pokomoke City Police Department,16000US2462475
  
negative.code: Agency Code,Agency Name,GEOID
  AACCPSP,AACCPSP,
  AACOPD,Anne Arundel County Police Department,05000US24003
  AACOSHERIFF,Anne Arundel County Sheriff's Office,
  ABERDEEN,Aberdeen Police Department,16000US2400125
  ALLEGANY,Allegany County Sheriff's Office,
  ANNAPOLIS,Annapolis Police Department,16000US2401600
  BACOPD,Baltimore County Police Department,05000US24005
  BALTIMORE,BALTIMORE,
  BALTIMORESCHOOL,Baltimore City Schools Police,
  BALTOENVIR,Baltimore City Environmental Police,
  