[libreoffice-users] Re: Filter algorithm question

If I create a list of Y-values for the shape boundary for each X-coordinate
in the grid I end up with:

Y-value of the shape boundary             Corresponding X-coordinate of the
grid
9.10,11,12,13,14                                        7
8,15                                                            8
7,16                                                            9
6,17                                                            10
6,17                                                            11
6,11,12,17                                                  12
7,10,13,16                                                 13
8,9,14,15                                                   14

If I now look at my list of bird coordinates and take one example of a birds
X-coordinate being 12, its within the ranges of the shape boundary Y-values
above, but if I check its position (at X=12, Y=19) I can see its not within
the boundary. So I'm still missing something. 



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