anchor.diff:  DFLO,Observatorio met. 1939, Flores,,,intl,-425,20,-169,20,81,20,38,41,-33,-30,0,0,0,0,default,
   DFOT,Fort thomas 1955, Leeward Is.,,,clrk80,-7,25,215,25,225,25,16,19,-64,-61,0,0,0,0,default,
   DGAA,Gan 1970, Rep. of Maldives,,,intl,-133,25,-321,25,50,25,-2,9,71,75,0,0,0,0,default,
  -DGEO,Geodetic datum 1949, NZ,,,intl,84,5,-22,3,209,5,-48,-33,165,180,0,0,0,0,default,
  +DGEO,Geodetic datum 1949, NZ,New_Zealand_Geodetic_Datum_1949 ,EPSG:6272,intl,84,5,-22,3,209,5,-48,-33,165,180,0,0,0,0,default,
   DGIZ,Dos 1968, Gizo Island,,,intl,230,25,-199,25,-752,25,-10,-7,155,158,0,0,0,0,default,
   DGRA,Graciosa base sw 1948, Azores,,,intl,-104,3,167,3,-38,3,37,41,-30,-26,0,0,0,0,default,
   DGUA,Guam 1963,,,,clrk66,-100,3,-248,3,259,3,12,15,143,146,0,0,0,0,default,
  
positive.code: DQAT,Qatar national,,,,intl,-128,20,-283,20,22,20,19,32,45,57,0,0,0,0,default,
  DQUO,Qornoq, South Greenland,,,intl,164,25,138,25,-189,32,57,85,-77,-7,0,0,0,0,default,
  DREU,Reunion, Mascarene Is.,,,intl,94,25,-948,25,-1262,25,-27,-12,47,65,0,0,0,0,default,
  DSAE,Santo (dos) 1965,,,,intl,170,25,42,25,84,25,-20,-11,163,172,0,0,0,0,default,
  DSAO,Sao braz, Santa Maria Is.,,,intl,-203,25,141,25,53,25,35,39,-27,-23,0,0,0,0,default,
  DSAP,Sapper hill 1943, E Falkland Is,,,intl,-355,1,21,1,72,1,-54,-50,-61,-56,0,0,0,0,default,
  DSAN-M,South american 1969, Mean,,,GRS67,-57,15,1,6,-41,9,-65,-50,-90,-25,0,0,0,0,default,
  
negative.code: DING-B,Indian 1960, Con Son Island,,,evrst30,182,25,915,25,344,25,6,11,104,109,0,0,0,0,default,
  DINH-A,Indian 1975, Thailand,,,evrst30,209,12,818,10,290,12,0,27,91,111,0,0,0,0,default,
  DINH-A1,Indian 1975, Thailand,,,evrst30,210,3,814,2,289,3,0,27,91,111,0,0,0,0,default,
  DIRL,Ireland 1965,,Geodetic_Datum_of_1965,EPSG:6300,ELLAM,506,3,-122,3,611,3,50,57,-12,-4,0,0,0,0,default,
  DISG,Ists 061 astro 1968, S Georgia,,,intl,-794,25,119,25,-298,25,-56,-52,-38,-34,0,0,0,0,default,
  DIST,Ists 073 astro 1969, Diego Garc,,,intl,208,25,-435,25,-229,25,-10,-4,69,75,0,0,0,0,default,
  DJOH,Johnston island 1961,,,,intl,189,25,-79,25,-202,25,15,19,-171,-168,0,0,0,0,default,
  