I have two raster layers: One with 56 m resolution and the other has 30 m resolution. Usually, I just use the 'Combine' command in ArcGIS to combine them, getting a single value for each unique combination of values of the 2 rasters. ArcGIS internally controls the resampling, and the resulting raster is 56 m in resolution.
Alternatively, one can split the 56m raster into two (getting two 28m rasters as result), resample the 28m rasters into 30 m rasters and then combine with the other 30 m raster.
Which way is better in terms of being more accurate? Any citations to this extent would be super helpful.