I am trying to create a raster by using the TIN Interpolation tool in QGIS. I'm using a 3D polygon shapefile as input. I'm looking to create a raster of square pixels, although despite specifying a square output extent and 0.1m cell size, the resulting tif file contains cell size that are slightly non-square (e.g. 0.09999500000000000055,-0.09999750000000000305).
I've done this process many times before with no issue and can't understand why this is different. Can anyone tell me why this is happening?