fix post process function was using wrong dataset dimensions

drivers/intake_geokube/afm.py

@@ -21,10 +21,10 @@ def postprocess_afm(ds: xr.Dataset, post_process_chunks) -> xr.Dataset:
     ds = ds.drop('lon')
     ds = ds.drop('certainty')
     deduplicated = ds.expand_dims(dim={"latitude": latitude, "longitude": longitude}, axis=(1, 0))
-    for dim in ds.dims:
+    for dim in deduplicated.dims:
         indexes = {dim: ~deduplicated.get_index(dim).duplicated(keep='first')}
         deduplicated = deduplicated.isel(indexes)
-    return add_projection(deduplicated.sortby('time').chunk(post_process_chunks))
+    return add_projection(deduplicated.sortby('time').sortby('latitude').sortby('longitude').chunk(post_process_chunks))
 
 def add_projection(dset: xr.Dataset, **kwargs) -> xr.Dataset:
     """Add projection information to the dataset"""