The main advantage of pstogif over conversion packages such as the widely used convert, is that pstogif performs any scaling of the image before conversion - convert performs the scaling after the conversion, leading to strange artifacts in the image, notably with straight lines, and interpolation of colours.
For more information, see the
manual ('man page') in HTML form.
Standard conversion into GIF, with a 5-pixel wide white margin. The image contains comment text and -- since the original PostScript image is in landscape format -- had to be rotated over -90 degrees. Same as above, but now with a 1-pixel wide black line around the white margin that surrounds the plot. Transparent PNG image. Silly rotation with double-coloured margin.
Note that rotations over angles which are not multiples of 90 degrees ruin straight lines.
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