ERDAS Imagine 8.4 FAQs
by Susan Delap

QUESTION: How do I export an IMG file to a TIF file?
ANSWER: Open Imagine 8.4 and do the following:

• Click IMPORT button.
• Select Export
• Select file type TIFF
• Select input file (click on folder icon)
• Select output file (click on folder icon to get destination folder)
• Click OK
• Leave options as is
• Click OK

QUESTION: The resulting TIF is just as huge as the IMG file. How can I make it smaller?
ANSWER: Use a bitmap imaging program like Corel PhotoPaint or Adobe PhotoShop that allows you to resample the file at a different size and/or resolution. If using Corel PhotoPaint, do the following:

• Open the TIF file in Corel PhotoPaint
• Select Image->Resample
• Make sure "Maintain aspect ratio" is selected
• Under Image Size, change either the Width or Height to the actual size you will be using in the final application
• Under Resolution, change to one of the following:
• 72-96 dpi for Internet or on-screen use only
• 150-300 dpi for printing or presentations
• Watch New Image Size and adjust the above to get the desired image size
• Click OK
• Select File->Save AS to save your file and not overwrite the original in case you need to go back and readjust the settings.