Use Convert Interleave to convert between common data storage conventions. Often, it is more efficient to use image data stored in a specific manner for specific processing operations or interactive analysis.

1. From the Toolbox, select Raster Management > Convert Interleave.
2. Select an input file and perform optional spatial and spectral subsetting, then click OK. The Convert File Parameters dialog appears.
3. Choose the output data type from the Output Interleave radio buttons. ENVI automatically determines the format of the input file and offers conversion to the other two formats.
4. From the Convert in Place toggle button, select Yes or No.
• Yes: Overwrites the existing file. This option saves significant disk space, but the process is slower than writing to a separate file.

• No: Writes the converted file to a separate output file.

  Note: If the overwrite function fails for any reason (for example, due to a power outage), your data will be corrupted and the original file will not be recoverable.

5. Enter the output filename.
6. Click OK. ENVI adds the resulting output to the Layer Manager.