So recorded span is 15 meters (half a pixel) smaller than actual span.
The usual error of incorrectly computing bounding box in Lon/Lat domain that assumes that projecting bounding box to Lon/Lat is the same as computing bounding box after projecting the whole shape into Lon/Lat with extra points added and then computing the bounding box
https://github.com/opendatacube/datacube-dataset-config/blob/5d20cf63db9cf02db1d12b45860cec216c835d38/scripts/index_from_s3_bucket.py#L78-L84
So recorded span is 15 meters (half a pixel) smaller than actual span.
https://github.com/opendatacube/datacube-dataset-config/blob/5d20cf63db9cf02db1d12b45860cec216c835d38/scripts/index_from_s3_bucket.py#L87-L94