SFW - Seattle FilmWorks Image

SFW is a file extension that is used by Seattle Film Works formerly known as Photo Works. These files are used to store bitmap images. SFW is a proprietary graphics format.
SDW - MrSID World File

GIS file created for MrSID .SID raster images; contains georeferencing information that maps the raster image data in the SID file to real-world coordinates; contains the units of measurement for the image pixels as well as the coordinates of the upper-left hand pixel.
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