PNG or Portable Network Graphics
is an image file format with lossless compression.

Windows users (other then 95) will want to use the free Memory-Map viewer anyway so file format is less important. However you cannot print anything larger than a screen capture from the free software included unless you register the software.

So... Can you use a PNG file with one of your image editing programs?

All Users - If you are unsure, download this test image pngtest.png (9k) and see if it opens. (This may simply open the image in your browser window. If it does then choose File>Save As to save the file. Hint: you may also be able to save in other file formats besides PNG.)

Unsuccessful? - Check with your friends. One of them will be able to help you convert PNG to a format you can use or contact me and I'll offer suggestions.

Successful? - To try before you buy... Download the small sample from 52B06 etopo-quetico.png (428k) This is the small section of one of the actual map files included on the CD. Average file size on the CD is ~5MB on disk ~15MB opened. 25"x30" @ 150 ppi.

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