Rigth now it's possible to remove granules from a image mosaic by specifying a filter on this part of the REST API: http://docs.geoserver.org/latest/en/api/#/1.0.0/structuredcoverages.yaml However, that simply un-registers the granules from the mosaic. Add a purge parameter to the call allowing to:
- Remove the file metadata (purge=metadata), in particular whatever information was collected for the file (e.g., the NetCDF sidecar indexes)
- Remove the data as well, using "purge=all", if it fell orphan (no more records in the mosaic index pointing to that file)
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