s for the first 
                     coordinate of the first logical record 
 
                     the coefficients for the second coordinate 
 
                     the coefficients for the third coordinate 
 
                     the coefficients for the first coordinate for 
                     the second logical record, ... 
 
                     and so on. 
                    
                  The logical data records are stored contiguously:

                     +----------+
                   