= Sgrav.e =

This takes a shapefile and generates extra data showing gravity info on it, specifically the surface acceleration, potential and laplacian.  This is for a non-rotating body with GM=1.


=== Input - files ===
 * Shapefile - Full path and extension is needed.

=== Input - stdin ===

 * What it asks for  
{{{ 
  input shapefile
  SHAPEFILES/SHAPE.TXT
}}}

=== Output ===
 * ["SHAPE.TXT"] but with extra columns for surface acceleration 
 * ????? 

=== Parallel Conflict ===
 * Minimal conflict
 * Multiple runs in separate directory
 * Shape file (SHAPE.TXT) must remain static.

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