anchor.diff:  Agency Code,Agency Name,GEOID
   AACCPSP,AACCPSP,
  -AACOPD,Anne Arundel County Police Department,
  +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,
  +BACOPD,Baltimore County Police Department,05000US24005
   BALTIMORE,BALTIMORE,
   BALTIMORESCHOOL,Baltimore City Schools Police,
   BALTOENVIR,Baltimore City Environmental Police,
  
positive.code: HANCOCK,Hancock Police Department,16000US2436600
  HARFORD,Harford County Sheriff's Office,
  HAVREDEGRACE,Havre De Grace Police Department,16000US2437600
  HOCPD,Howard County Police Department,
  HURLOCK,Hurlock Police Department,16000US2441125
  HYATTSVILLE,Hyattsville City Police Department,16000US2441250
  KENT,Kent County Sheriff's Office,
  
negative.code: OCEANPINES,Ocean Pines Police Department,
  OXFORD,Oxford Police Department,16000US2459450
  PERRYVILLE,Perryville Police Department,16000US2461150
  PGCOPD,Prince George's County Police Department,05000US24033
  PGCOSHERIFF,Prince George's County Sheriff's Office,
  PGPARK,PGPARK,
  POCOMOKE,Pokomoke City Police Department,16000US2462475
  