anchor.diff:  PH21,277500,801500,57.08834,-4.02169,,Highland,Scotland,SCT,Scotland
   PH22,290900,813400,57.19857,-3.80587,Aviemore,Highland,Scotland,SCT,Scotland
   PH23,291500,823300,57.28761,-3.80028,,Highland,Scotland,SCT,Scotland
  -PH24,294500,819500,57.25419,-3.74891,Boat Of Garten,Highland,Scotland,SCT,Scotland
  +PH24,294500,819500,57.25419,-3.74891,Boat of Garten,Highland,Scotland,SCT,Scotland
   PH25,300700,820200,57.26187,-3.64646,Nethy Bridge,Highland,Scotland,SCT,Scotland
   PH26,303400,827700,57.3298,-3.60464,Grantown-on-Spey,Highland,Scotland,SCT,Scotland
   PH3,294600,713500,56.30228,-3.70355,Auchterarder,Perth and Kinross,Scotland,SCT,Scotland
  
positive.code: AB15,390000,805300,57.13868,-2.16525,Aberdeen,Aberdeen City,Scotland,SCT,Scotland
  AB16,390600,807800,57.16115,-2.15543,Aberdeen,Aberdeen City,Scotland,SCT,Scotland
  AB21,387900,813200,57.2096,-2.20033,Aberdeen Airport,Aberdeen City,Scotland,SCT,Scotland
  AB22,392800,810700,57.18724,-2.11913,Bridge Of Don,Aberdeen City,Scotland,SCT,Scotland
  AB23,394700,813500,57.21242,-2.08776,Aberdeen,Aberdeen City,Scotland,SCT,Scotland
  AB24,393308,808004,57.16284,-2.11228,Aberdeen,Aberdeen City,Scotland,SCT,Scotland
  AB25,393200,806900,57.15311,-2.11241,Aberdeen,Aberdeen City,Scotland,SCT,Scotland
  
negative.code: IV54,183000,843600,57.43101,-5.61538,,Highland,Scotland,SCT,Scotland
  IV55,123500,850300,57.45873,-6.611,,Highland,Scotland,SCT,Scotland
  IV56,133800,839300,57.36636,-6.4279,Isle of Skye,Highland,Scotland,SCT,Scotland
  IV6,252900,851100,57.52634,-4.45682,Muir of Ord,Highland,Scotland,SCT,Scotland
  IV63,249200,828500,57.32228,-4.50465,Lewiston,Highland,Scotland,SCT,Scotland
  IV7,257500,857400,57.58435,-4.38376,,Highland,Scotland,SCT,Scotland
  IV8,264500,853800,57.55419,-4.26477,,Highland,Scotland,SCT,Scotland
  