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\begin{methoddesc}[FaultSystem]{getCenterOnSurface}{} 
\begin{methoddesc}[FaultSystem]{getCenterOnSurface}{} 
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returns the center point of the fault system at the surfaces. In 3D the calculation of the center is 
returns the center point of the fault system at the surfaces. In 3D the calculation of the center is 
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considering the top edge of the faults and projects the edge to the surface (the $x\hackscore{2}$ component is assumed to be 0}. An \numpyNDA object is returned. 
considering the top edge of the faults and projects the edge to the surface (the $x\hackscore{2}$ component is assumed to be 0). An \numpyNDA object is returned. 
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\end{methoddesc} 
\end{methoddesc} 
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\begin{methoddesc}[FaultSystem]{getOrientationOnSurface}{} 
\begin{methoddesc}[FaultSystem]{getOrientationOnSurface}{} 