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  If a netCDF file is well-formed, it is possible to create mosaic dataset directly from netCDF on S3. This is particularly useful if netCDF is already in an aggregated form in one single large file.

Step-by-step guide for ArcGIS Pro

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2.5

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This method doesn't work on ArcGIS Pro 2.6.

1. Create AWS S3 connection and save it as <your_name>.acs file.
2. Make sure that you can browse files in your bucket.
   1. Since .nc4 files will not be listed, it's better to put some (fake) .mrf/.he5/.tif/.crf file on the bucket.
   2. If connection file doesn't list any object, something must be wrong. Delete the .acs file and re-create one.
3. Create a new mosaic dataset.
4. Select NETCDF as input type.
5. Select file icon. Since you can't browse the netCDF-4 file under the .acs file, type the filename in the editor box.
   1. It's good to copy & paste netCDF file name and connection file name using editor.
   2. Type something like c:/tmp/mop03tm.acs/MOP03TM.nc4
6. Publish the mosaic dataset using "Share as Web Layer."

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