anchor.diff:  ANAU,CG,no,Anaura Bay,-38.268212852,178.291223348,229.304,WGS84,2010-10-18T00:00:00Z,9999-01-01T00:00:00Z
   ARTA,CG,no,Aratiatia Dam,-38.61758168,176.136412112,369.723,NZGD2000,2008-11-05T00:00:00Z,9999-01-01T00:00:00Z
   ATIA,XX,no,Aratiatia Dam,-38.61757094,176.1364247,369,NZGD2000,2006-10-12T00:00:00Z,2006-11-08T00:00:00Z
  -AUCK,LI,yes,Whangaparaoa No 3,-36.60284461,174.8343855,132.6823,NZGD2000,1995-09-18T00:00:00Z,9999-01-01T00:00:00Z
  +AUCK,LI,yes,Whangaparaoa No 3,-36.602844642,174.834385456,132.6823,NZGD2000,1995-09-18T00:00:00Z,9999-01-01T00:00:00Z
   AUKT,GN,no,Auckland Tide Gauge,-36.8437546,174.7704204,40.1,WGS84,2009-09-22T00:00:00Z,9999-01-01T00:00:00Z
   AVLN,CG,no,Avalon Sound Stage,-41.196440847,174.932860198,39.552,NZGD2000,2006-02-24T00:00:00Z,9999-01-01T00:00:00Z
   BHST,CG,no,Black Hill Station,-39.489184001,176.063174364,882.479,NZGD2000,2008-06-12T00:00:00Z,9999-01-01T00:00:00Z
   BIRF,CG,no,Birch Farm,-40.67976734,176.24610828,308.983,NZGD2000,2005-01-26T00:00:00Z,9999-01-01T00:00:00Z
  -BLUF,LI,no,Bluff,-46.58506441,168.2920867,124.6399,NZGD2000,2004-03-05T00:00:00Z,9999-01-01T00:00:00Z
  +BLUF,LI,no,Bluff,-46.58506442,168.292086628,124.6403,NZGD2000,2004-03-05T00:00:00Z,9999-01-01T00:00:00Z
   BM8A,XX,no,8A Balmoral Lane,-43.557364295,172.732502262,37.65,WGS84,2013-01-29T00:00:00Z,2016-05-06T00:00:00Z
   BNET,SA,no,Burnett Rock,-43.862486612,170.190142352,757.772,NZGD2000,2005-02-15T00:00:00Z,9999-01-01T00:00:00Z
   BTHL,CG,no,Battery Hill,-41.340489746,175.136541284,78.839,NZGD2000,2009-01-13T00:00:00Z,9999-01-01T00:00:00Z
   CAST,CG,no,Castlepoint Station,-40.90981771,176.20155589,173.636,NZGD2000,2006-02-08T00:00:00Z,9999-01-01T00:00:00Z
  -CHAT,LI,yes,Chatham Island,-43.95578687,-176.5658389,57.98,NZGD2000,1995-10-04T00:00:00Z,2012-05-23T00:00:00Z
  -CHTI,LI,yes,Chatham Island North,-43.73547649,-176.6171102,75.6782,NZGD2000,2007-12-10T00:00:00Z,9999-01-01T00:00:00Z
  +CHAT,LI,yes,Chatham Island,-43.955786909,-176.56583897,57.9744,NZGD2000,1995-10-04T00:00:00Z,2012-05-23T00:00:00Z
  +CHTI,LI,yes,Chatham Island North,-43.735476523,-176.617110212,75.6784,NZGD2000,2007-12-10T00:00:00Z,9999-01-01T00:00:00Z
   CKID,CG,no,Cape Kidnappers,-39.65787439,177.07635309,234.903,NZGD2000,2006-05-23T00:00:00Z,9999-01-01T00:00:00Z
   CLIM,CG,no,Mt. Climie,-41.14466931,175.14547309,830.724,NZGD2000,2005-10-18T00:00:00Z,9999-01-01T00:00:00Z
   CLRR,CG,no,Clarence River,-42.144605449,173.815394015,922.9363,WGS84,2017-02-12T00:00:00Z,9999-01-01T00:00:00Z
  
positive.code: PRTU,CG,no,Paparatu,-38.814193241,177.697878483,634.663,NZGD2000,2009-08-17T00:00:00Z,9999-01-01T00:00:00Z
  PTOI,CG,no,Puketoi,-40.60106131,175.99926884,511.639,NZGD2000,2006-03-21T00:00:00Z,9999-01-01T00:00:00Z
  PUKE,CG,no,Puketiti,-38.07141492,178.257359581,468.075,NZGD2000,2004-02-16T00:00:00Z,9999-01-01T00:00:00Z
  PYGR,LI,no,Puysegur Point,-46.16617668,166.680735,253.2414,NZGD2000,2006-12-04T00:00:00Z,9999-01-01T00:00:00Z
  QUAR,SA,no,Quarry,-43.53167985,169.815818961,58.0333,NZGD2000,2000-02-05T00:00:00Z,9999-01-01T00:00:00Z
  RAHI,CG,no,Arahi,-38.916179094,177.086052871,467.092,NZGD2000,2008-05-15T00:00:00Z,9999-01-01T00:00:00Z
  RAKW,CG,no,Raukawa,-39.747201862,176.621161167,334.823,WGS84,2011-02-16T00:00:00Z,9999-01-01T00:00:00Z
  
negative.code: NIUM,GN,yes,Niue Meteorological Station,-19.076565719,-169.927066765,90.121,WGS84,2005-09-14T00:00:00Z,9999-01-01T00:00:00Z
  NLS1,XX,no,Nelson Landslide 1,-41.278281772,173.255763078,66.573,NZGD2000,2011-12-19T00:00:00Z,2013-11-14T00:00:00Z
  NLS2,XX,no,Nelson Landslide 2,-41.278147,173.254006,35,WGS84,2011-12-20T00:00:00Z,2013-11-14T00:00:00Z
  NLSN,LI,no,Nelson,-41.183508553,173.433730356,302.1239,NZGD2000,2004-02-06T00:00:00Z,9999-01-01T00:00:00Z
  NMAI,CG,no,Naumai,-39.09704167,176.806622735,857.565,NZGD2000,2008-04-07T00:00:00Z,9999-01-01T00:00:00Z
  NPLY,LI,no,New Plymouth,-39.1825575,174.118174061,416.9242,NZGD2000,2003-03-20T00:00:00Z,9999-01-01T00:00:00Z
  NRRD,CG,no,North Range Road,-40.385438526,175.761337945,500.701,NZGD2000,2008-03-27T00:00:00Z,9999-01-01T00:00:00Z
  NRSW,CG,no,Norsewood,-40.113323422,176.200037533,364.054,NZGD2000,2011-01-18T00:00:00Z,9999-01-01T00:00:00Z
  OHIN,CG,no,Ohingaiti,-39.918289832,175.790675494,530.658,NZGD2000,2008-09-03T00:00:00Z,9999-01-01T00:00:00Z
  