Hi Chris,
Thanks for your interest in syncfusion products.
We can get the relative position of Tiles. We have prepared the small workaround sample to achieve this requirement and have attached here. We have used DragMouseMove event with TransformToVisual to get the relative position of tiles.We hope it would satify your needs.
Please let us know if you have any queries.
Regards,
David C
TileViewSample_868d0310.zip