grap
A charting preprocessor for the groff (GNU Troff) document formatting system. tldr-pages
On several platforms
Several platforms
Process a grap file and save the output file for future processing with pic and groff
grap path/to/input.grap >path/to/output.picIdentifyTypeset a grap file to PDF using the me macro package, saving the output to a file
grap path/to/input.grap | pic -T pdf | groff -me -T pdf >path/to/output.pdfIdentify