When you import data by uploading it to AmigoCloud, the default name for the field in the database that contains the geometry is called 'wkb_geometry'
It is a very common name that is used in Open Source applications to give you a hint that field contains a Well Known Binary. That is, to imply that, you can use any of the postgis wkb operators.
That means that you can use the SQL operators on it, for example:
SELECT st_buffer(wkb_geometry, 0.001) from dataset_<number>;
SELECT st_centroid(wkb_
And any of the hundreds of operators described above.
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