anchor.diff:  SBFZ,,82398,Fortaleza/Pinto,,BR,-3.76666666667,-38.5166666667,25,6,823980
   KIPL,IPL,,Imperial,CA,US,32.84,-115.57,-17,6,kipl
   MMCZ,CZM,76648,Cozumel,,MX,20.53,-86.93,5,6,mmcz
  -KANJ,ANJ,72734,Sault Ste Marie/Sanderson Field,MI,US,46.485,-84.366,218,0,anj
  +KANJ,ANJ,72734,Sault Ste Marie,MI,US,46.485,-84.366,218,0,anj
   CYOC,YOC,,Old Crow Airport,YK,CA,67.57,-139.84,251,6,cyoc
   KHFD,HFD,,Hartford,CT,US,41.73,-72.65,4,4,khfd
   CYYT,YYT,71801,St. Johns/Torbay,NF,CA,47.62,-52.75,140,5,cyyt
  
positive.code: ,,,000237,,,34.34,-117.4,923,7,000237
  EGVN,,3649,Brize Norton RAF,,GB,51.75,-1.58,88,7,003649
  KFRI,FRI,72455,Junction City,KS,US,39.055,-96.765,325,6,fri
  KOQU,OQU,,N. Kingston/Quon,RI,US,41.61,-71.42,6,7,koqu
  ,,,c28,,,34.5,-82.5,244,7,c28
  ,,,000277,,,38.49,-121.22,33,7,000277
  MGSJ,,78647,San Jose,,GT,13.9166666667,-90.8333333333,9,6,mgsj
  
negative.code: ,,,723070,,,36.82,-72.1,7,7,723070
  ,,,443850,,,43.2,107.17,914,7,443850
  ,,,000732,,,41.43,-121.46,1603,7,000732
  KBDL,BDL,72508,Windsor Locks,CT,US,41.94,-72.68,60,6,kbdl
  KLAF,LAF,,Lafayette/Purdue,IN,US,40.43,-86.93,182,4,klaf
  ,,,000255,,,46.7,-48.0,0,7,000255
  ,,,915005,,,5.3,132.2,0,7,915005
  