Whats a raster image?
A. When you send a fax, your fax machine creates a raster image file and transmits the file. Your fax machine is a small scanner. Most fax machines scan at 50 or 75 dpi. A raster image is “viewable” and “editable”. The image has no intelligent data, for example no text “fonts”, no entities that can be changed from “circle” to “arc” etc. Typical file formats include tif, pcx, cg4, rle, rlc, tga. TIFF stands for Tagged Image File Format. CALS is the Government version of TIFF. This can be a CAL extension, a CG4 extension, or a TG4 extension. Note most raster editing programs (Paint Shop Pro, Adobe Photoshop, Harvard Graphics etc. have size and/or pixel limitations for display/editing. If your drawing is larger than 11×17″ you may not be able to use the aforementioned programs without great difficulty( if at all) to edit your raster files.
