@davidhassell commented on this pull request.


> @@ -606,7 +606,7 @@ For the reconstituted coordinates, cell bounds are stored 
> separately for each co
 for the example of 2D bounds. Since the  cell bounds are contiguous, bounds 
points of adjacent cells will coincide and so the full set of bounds points may 
be represented as a grid, comparable to the coordinate points grid. In the 
middle part of <<figure_interpolation_of_cell_boundaries>>
 , both the reconstituted bounds points grid and the reconstituted coordinate 
points grid are shown for a continuous area, where  each bounds point may be 
shared by up to four cells. 
 
-For the purpose of bounds interpolation, a single bounds tie point is created 
for each coordinate tie point, and is selected as the vertex of the tie point 
cell  that is the closest to the boundary of the interpolation subarea with 
respect to each interpolated dimension. For the example of 2D bounds, the 
resulting set of bounds tie points are marked in 
<<figure_interpolation_of_cell_boundaries>>. 
+Bounds interpolation uses the same tie point index variables and therefore the 
same tie point cells as coordinate interpolation. One of the vertices of each 
coordinate tie point cell is chosen as the bounds tie point for the cell. It is 
selected as the vertex of the tie point cell that is the closest to the 
boundary of the interpolation subarea with respect to each interpolated 
dimension. For the example of 2D bounds, the resulting set of bounds tie points 
are marked in <<figure_interpolation_of_cell_boundaries>>, where the selected 
vertices are those closets to the corners of the interpolation subareas. 

closets -> closest

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