anchor.diff:  Beta-20786,520,50,0,Charcoal,Moanda Gare,GAB,,,,-1.5556,13.1806,Clist 2004/05
   Beta-20787,560,50,0,Elaeis guineensis,Okala 1,GAB,,,,0.490556,9.4125,Clist 2004/05
   Beta-20788,2250,60,0,Elaeis guineensis,Okala 1,GAB,,Pit,,0.490556,9.4125,Clist 2004/05
  -Beta-20789,4810,80,0,,Riviere Denis,GAB,1,,,0.322222,9.347778,Clist 1989
  +Beta-20789,4810,80,0,,Riviere Denis,GAB,1,,0,0.322222,9.347778,Clist 1989
   Beta-20790,2230,60,0,Elaeis guineensis,Okala 1,GAB,,Pit,,0.490556,9.4125,Clist 2004/05
   Beta-20791,2300,100,0,,Djambala,COG,,,,-2.54472,14.75333,Pincon 1991
   Beta-22081,5420,120,0,,Lac Noir de Ndende,GAB,,,,-2.233,11.333,Clist 1989
  
positive.code: Ly-9350,150,30,,,Ngweu,CMR,,,,5.597071,11.35586,Delneuf et al. 2003; Garcin et al. 2018
  Ly-957,2335,55,0,,Ngoume PK 36,CMR,,Pit,0,5.4833,11.4,Delneuf et al. 2003
  Ly-958,3730,55,0,,Kong,CMR,,Trench,,5.69,12,Delneuf et al. 2003
  MC-2377,6430,130,0,Shell (River/Ocean),Port a Bois,GAB,,,,,,Clist 2004/05
  MC-2517,500,80,0,Charcoal,Mucucu,RWA,I,,,-1.533333,30.566667,de Maret 1985
  MC-2518,1951,80,0,Charcoal,Mucucu,RWA,I,,,-1.533333,30.566667,de Maret 1985
  MC-2519,2350,80,0,Charcoal,Mucucu,RWA,I,,,-1.533333,30.566667,de Maret 1985
  
negative.code: TH-1175,2040,130,0,Charcoal,Bafounda,CMR,,,0,5.543333,10.326944,Hori et al. 1986
  TO-8172,3460,200,0,Pennisetum glaucum,Birimi,,,,,10.561541,-0.392823,Manning 2010
  TO-8173,2960,370,0,Pennisetum glaucum,Birimi,,,,,10.561541,-0.392823,Manning 2010
  Tx-5956,2880,90,0,,Tchissanga,COG,West,,0,-4.538866,11.798009,Denbow 2012
  Tx-5957,1720,80,0,,Madingo-Kayes,COG,,,,-4.43167,11.69611,Denbow 1990
  Tx-5958,1810,60,0,,Madingo-Kayes,COG,,,,-4.43167,11.69611,Denbow 1990
  Tx-6183,2110,60,0,,Tandou-Youmbi,COG,,Pit,,-4.41639,11.69056,Denbow 1990
  