pdfposter can be used to create a large poster by
building it from multple pages and/or printing it
on large media. It expects as input a PDF file,
normally printing on a single page. The output is
again a PDF file, maybe containing multiple pages
together, thus building the poster. The input page
will be scaled to obtain the desired size. This is
much like poster does for Postscript files, but
works with PDF instead, since sometimes poster
does not like your files converted from PDF.
Indeed, pdfposter was inspired by poster.
