AI-generated Key Takeaways
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          The content describes how to select an image file format to return a block of pixel data. 
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          Supported image file formats include JPEG, PNG, AUTO_JPEG_PNG, NPY, GEO_TIFF, TF_RECORD_IMAGE, ZIPPED_GEO_TIFF, and ZIPPED_GEO_TIFF_PER_BAND. 
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          JPEG, PNG, and AUTO_JPEG_PNG are intended for display purposes and only support 8-bit RGB data or data converted to 8-bit RGB. 
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          Some formats like ZIPPED_GEO_TIFF and ZIPPED_GEO_TIFF_PER_BAND are only available when using CreateThumbnail. 
Selects an image file format in which to return a block of pixel data.
| Enums | |
|---|---|
| IMAGE_FILE_FORMAT_UNSPECIFIED | Unspecified. | 
| JPEG | JPEG. Intended for display purposes. Only supported for 8-bit RGB data, or data that is converted to 8-bit RGB via visualizationparameters. | 
| PNG | PNG. Intended for display purposes. Only supported for 8-bit RGB data, or data that is converted to 8-bit RGB via visualizationparameters. | 
| AUTO_JPEG_PNG | Automatically select JPEG or PNG depending on whether or not there is any transparency. Intended for display purposes. Only supported for 8-bit RGB data, or data that is converted to 8-bit RGB via visualizationparameters. | 
| NPY | NumPy .npy format. | 
| GEO_TIFF | GeoTIFF format. | 
| TF_RECORD_IMAGE | TFRecord format. Only supported for image exports. | 
| ZIPPED_GEO_TIFF | A format which returns a GeoTIFF file wrapped in a zip file. This is only available when using CreateThumbnail. | 
| ZIPPED_GEO_TIFF_PER_BAND | A format which returns a GeoTIFF file for each band, wrapped in a zip file. This is only available when using CreateThumbnail. |