13    'nports' = number of boundary port sections
   1    'kdport' = port orientation (1=N, 2=S, 3=E, 4=W)
   2    'ifport' = first i-index
  88    'ilport' = last  i-index (=ifport for east/west port)
 436    'jfport' = first j-index
 436    'jlport' = last  j-index (=jfport for north/south port)
   1    'kdport' = port orientation (1=N, 2=S, 3=E, 4=W)
  90    'ifport' = first i-index
 153    'ilport' = last  i-index (=ifport for east/west port)
 436    'jfport' = first j-index
 436    'jlport' = last  j-index (=jfport for north/south port)
   1    'kdport' = port orientation (1=N, 2=S, 3=E, 4=W)
 262    'ifport' = first i-index
 275    'ilport' = last  i-index (=ifport for east/west port)
 436    'jfport' = first j-index
 436    'jlport' = last  j-index (=jfport for north/south port)
   1    'kdport' = port orientation (1=N, 2=S, 3=E, 4=W)
 279    'ifport' = first i-index
 313    'ilport' = last  i-index (=ifport for east/west port)
 436    'jfport' = first j-index
 436    'jlport' = last  j-index (=jfport for north/south port)
   1    'kdport' = port orientation (1=N, 2=S, 3=E, 4=W)
 342    'ifport' = first i-index
 370    'ilport' = last  i-index (=ifport for east/west port)
 436    'jfport' = first j-index
 436    'jlport' = last  j-index (=jfport for north/south port)
   1    'kdport' = port orientation (1=N, 2=S, 3=E, 4=W)
 373    'ifport' = first i-index
1063    'ilport' = last  i-index (=ifport for east/west port)
 436    'jfport' = first j-index
 436    'jlport' = last  j-index (=jfport for north/south port)
   2    'kdport' = port orientation (1=N, 2=S, 3=E, 4=W)
 315    'ifport' = first i-index
 618    'ilport' = last  i-index (=ifport for east/west port)
   2    'jfport' = first j-index
   2    'jlport' = last  j-index (=jfport for north/south port)
   2    'kdport' = port orientation (1=N, 2=S, 3=E, 4=W)
 638    'ifport' = first i-index
 639    'ilport' = last  i-index (=ifport for east/west port)
   2    'jfport' = first j-index
   2    'jlport' = last  j-index (=jfport for north/south port)
   2    'kdport' = port orientation (1=N, 2=S, 3=E, 4=W)
 641    'ifport' = first i-index
1063    'ilport' = last  i-index (=ifport for east/west port)
   2    'jfport' = first j-index
   2    'jlport' = last  j-index (=jfport for north/south port)
   3    'kdport' = port orientation (1=N, 2=S, 3=E, 4=W)
1064    'ifport' = first i-index
1064    'ilport' = last  i-index (=ifport for east/west port)
   2    'jfport' = first j-index
 435    'jlport' = last  j-index (=jfport for north/south port)
   4    'kdport' = port orientation (1=N, 2=S, 3=E, 4=W)
   2    'ifport' = first i-index
   2    'ilport' = last  i-index (=ifport for east/west port)
  317   'jfport' = first j-index
  377   'jlport' = last  j-index (=jfport for north/south port)
   4    'kdport' = port orientation (1=N, 2=S, 3=E, 4=W)
   2    'ifport' = first i-index
   2    'ilport' = last  i-index (=ifport for east/west port)
 391   'jfport' = first j-index
 394   'jlport' = last  j-index (=jfport for north/south port)
   4    'kdport' = port orientation (1=N, 2=S, 3=E, 4=W)
   2    'ifport' = first i-index
   2    'ilport' = last  i-index (=ifport for east/west port)
 397   'jfport' = first j-index
 435   'jlport' = last  j-index (=jfport for north/south port)