The graphic below illustrates what rules apply when a feature falls exactly on a cell boundary.
- If a feature falls on a cell boundary, use the cell above it; if there is not one there, then remain in the cell below.
- If there is a cell to the left, use it; if there is no cell, then remain in the cell on the right.
![Boundary rules illustration Boundary rules illustration](GUID-2A3CD0A5-DD2F-407C-8A5A-CA5868B32F7C-web.png)