Enačba pritisnjene površine:
f(x,y) = p00 + p10*x + p01*y + p20*x^2 + p11*x*y + p02*y^2 + p30*x^3 + p21*x^2*y
+ p12*x*y^2 + p03*y^3 + p40*x^4 + p31*x^3*y + p22*x^2*y^2
+ p13*x*y^3 + p04*y^4 + p50*x^5 + p41*x^4*y + p32*x^3*y^2
+ p23*x^2*y^3 + p14*x*y^4 + p05*y^5
Vrednosti koelificientov enačbe (oklepaji predstavljajo območja definiranosti) :
p00 = 0.0008899 (0.0008762, 0.0009036)
p10 = 0.0007889 (0.0007596, 0.0008183)
p01 = -0.000993 (-0.001019, -0.0009674)
p20 = 0.0003464 (0.0003207, 0.0003721)
p11 = -0.000602 (-0.0006188, -0.0005852)
p02 = 0.0006038 (0.0005841, 0.0006235)
p30 = 0.000235 (0.0001936, 0.0002764)
p21 = 8.191e-006 (-1.7e-005, 3.338e-005)
p12 = 9.216e-005 (6.96e-005, 0.0001147)
p03 = -0.0002304 (-0.0002588, -0.0002021)
p40 = -7.77e-005 (-8.81e-005, -6.73e-005)
p31 = 3.052e-006 (-3.5e-006, 9.603e-006)
p22 = -3.362e-005 (-3.972e-005, -2.753e-005)
p13 = 6.83e-005 (6.201e-005, 7.459e-005)
p04 = 1.55e-005 (8.5e-006, 2.251e-005)
p50 = -9.44e-005 (-0.0001076, -8.115e-005)
p41 = -1.01e-007 (-8.444e-006, 8.242e-006)
p32 = 1.908e-005 (1.225e-005, 2.59e-005)
p23 = -3.512e-006 (-1.028e-005, 3.253e-006)
p14 = -3.657e-005 (-4.358e-005, -2.956e-005)
p05 = 1.935e-005 (1.13e-005, 2.74e-005)