P  1 = (M =  11 , N =  12 , NAME='(11,12)')
 P  2 = (M =  11 , N =  71 , NAME='(11,71)')
 P  3 = (M =  11 , N = 131 , NAME='(11,131)')
 P  4 = (M =  22 , N =  70 , NAME='Monding')
 P  5 = (M =  44 , N =  70 , NAME='Rivier_1')
 P  6 = (M =  69 , N =  70 , NAME='Rivier_2')
 P  7 = (M = 109 , N =  70 , NAME='Rivier_3')
 P  8 = (M = 232 , N =  70 , NAME='Rivier_4')
 P  9 = (M = 306 , N =  70 , NAME='Rivier_5')
 P 10 = (M = 332 , N =  70 , NAME='Rivier_6')
 P 11 = (M =  49 , N =  73 , NAME='Maasluis')
 P 12 = (M =  73 , N =  73 , NAME='Lekhaven')
 P 13 = (M = 171 , N =  73 , NAME='Brienenoord')
#   for U-cross-sections:
 P 21=(M= 21, N= 66)    P 22=(M= 21, N= 73)
 P 23=(M= 42, N= 66)    P 24=(M= 42, N= 73)
 P 25=(M= 43, N= 66)    P 26=(M= 43, N= 73)
 P 27=(M=340, N= 66)    P 28=(M=340, N= 73)
 P 29=(M=167, N= 66)    P 30=(M=167, N= 73)
 P 31=(M= 64, N= 66)    P 32=(M= 64, N= 73)
 P 33=(M= 51, N= 66)    P 34=(M= 51, N= 73)
# randvoorwaarden punten
 P101 = (M =   2 , N =   2 , NAME='zee(2,2)')
 P102 = (M =   2 , N = 137 , NAME='zee(2,137)')
 P103 = (M = 421 , N =  66 , NAME='riv(421,66)')
 P104 = (M = 421 , N =  73 , NAME='riv(421,73')
# Neststations
P1001 = (M =  21 , N =  66 , NAME='(M,N) = (  21,  66)')
P1002 = (M =  21 , N =  67 , NAME='(M,N) = (  21,  67)')
P1003 = (M =  21 , N =  68 , NAME='(M,N) = (  21,  68)')
P1004 = (M =  21 , N =  69 , NAME='(M,N) = (  21,  69)')
P1005 = (M =  21 , N =  70 , NAME='(M,N) = (  21,  70)')
P1006 = (M =  21 , N =  71 , NAME='(M,N) = (  21,  71)')
P1007 = (M =  21 , N =  72 , NAME='(M,N) = (  21,  72)')
P1008 = (M =  21 , N =  73 , NAME='(M,N) = (  21,  73)')
P1009 = (M =  22 , N =  66 , NAME='(M,N) = (  22,  66)')
P1010 = (M =  22 , N =  67 , NAME='(M,N) = (  22,  67)')
P1011 = (M =  22 , N =  68 , NAME='(M,N) = (  22,  68)')
P1012 = (M =  22 , N =  69 , NAME='(M,N) = (  22,  69)')
P1013 = (M =  22 , N =  70 , NAME='(M,N) = (  22,  70)')
P1014 = (M =  22 , N =  71 , NAME='(M,N) = (  22,  71)')
P1015 = (M =  22 , N =  72 , NAME='(M,N) = (  22,  72)')
P1016 = (M =  22 , N =  73 , NAME='(M,N) = (  22,  73)')
P1017 = (M =  49 , N =  66 , NAME='(M,N) = (  49,  66)')
P1018 = (M =  49 , N =  67 , NAME='(M,N) = (  49,  67)')
P1019 = (M =  49 , N =  68 , NAME='(M,N) = (  49,  68)')
P1020 = (M =  49 , N =  69 , NAME='(M,N) = (  49,  69)')
P1021 = (M =  49 , N =  70 , NAME='(M,N) = (  49,  70)')
P1022 = (M =  49 , N =  71 , NAME='(M,N) = (  49,  71)')
P1023 = (M =  49 , N =  72 , NAME='(M,N) = (  49,  72)')
P1024 = (M =  49 , N =  73 , NAME='(M,N) = (  49,  73)')
P1025 = (M =  50 , N =  66 , NAME='(M,N) = (  50,  66)')
P1026 = (M =  50 , N =  67 , NAME='(M,N) = (  50,  67)')
P1027 = (M =  50 , N =  68 , NAME='(M,N) = (  50,  68)')
P1028 = (M =  50 , N =  69 , NAME='(M,N) = (  50,  69)')
P1029 = (M =  50 , N =  70 , NAME='(M,N) = (  50,  70)')
P1030 = (M =  50 , N =  71 , NAME='(M,N) = (  50,  71)')
P1031 = (M =  50 , N =  72 , NAME='(M,N) = (  50,  72)')
P1032 = (M =  50 , N =  73 , NAME='(M,N) = (  50,  73)')
P1033 = (M =  21 , N =  65 , NAME='(M,N) = (  21,  65)')
P1034 = (M =  21 , N =  74 , NAME='(M,N) = (  21,  74)')
P1035 = (M =  48 , N =  66 , NAME='(M,N) = (  48,  66)')
P1036 = (M =  48 , N =  67 , NAME='(M,N) = (  48,  67)')
P1037 = (M =  48 , N =  68 , NAME='(M,N) = (  48,  68)')
P1038 = (M =  48 , N =  69 , NAME='(M,N) = (  48,  69)')
P1039 = (M =  48 , N =  70 , NAME='(M,N) = (  48,  70)')
P1040 = (M =  48 , N =  71 , NAME='(M,N) = (  48,  71)')
P1041 = (M =  48 , N =  72 , NAME='(M,N) = (  48,  72)')
P1042 = (M =  48 , N =  73 , NAME='(M,N) = (  48,  73)')