Malte, There are two or maybe three issues here: (1) the floating point result obtained inside GMT seems to depend on the hardware and/or compiler used, with bad effects for at least one flavor of linux; (2) GMT should be robust enough that it doesn't generate a problem, even if the floating point math is not very good; (3) The display of GMT-created PostScript seems to depend on the debian gs version.
John Kuhn narrowed down issue (1) enough that Paul has found a solution, and this will be included as a bug fix in future releases. This will solve (1) and (2). Issue 1 may still be interesting for the debian linux community, but I can't tell from your last email which machines/compilers create and do not create the problem. Maybe John has narrowed this down. Your email seems to be about issue 3: Even when GMT generates PostScript one way, how it displays for you depends on whether you use debian gs or debian gs-aladdin. This may be an important problem, but sounds like it is not a GMT problem. walter Malte Thoma wrote: > > I have found a solution for the problem. > > the debian 'gs' package contains > >gs -v > >GNU Ghostscript 6.53 (2002-02-13) > >Copyright (C) 2002 artofcode LLC, Benicia, CA. All rights reserved. > > which is NOT compatible to the postscript code GMT creates > the debian 'gs-aladdin' package contains > >gs -v > >AFPL Ghostscript 7.00 (2001-04-08) > >Copyright (C) 2001 artofcode LLC, Benicia, CA. All rights reserved. > > if you install 'gs-aladdin' instead of 'gs' > 1. ps2epsi works and > 2. the problem descriped at the bottom of this page disappears > > ... but I still do nit understand the reason. > Is the aladdin-gs 'better' than the GNU-Version? > > Greetings, > Malte > > Paul Wessel wrote: > > John Kuhn wrote: > > > > > >>Walter & Paul, > >> > >>A user posted about a GMT bug on the debian-user mailing list this morning. > >>This bug appears with GMT 3.4 and 3.4.1 on Debian Linux, but not SuSE > >>Linux, HP-UX or Solaris. My initial investigation indicates a problem > >>with rounding/floating point errors. The user's original script produced > >>invalid PostScript (gv didn't like it). I reduced the original script to > >>the following one liner for debugging. > >> > >>psxy -R-180/180/-90/90 -JN0/15 -Sc0.15 -G0 << END > my.ps > >>2.5 52.5 > >>END > >> > > Hallo, > I am the 'user' John talked about :-) > I do not realy understand the discussion here, but the small gmt-code > above gives a result where 'gv' and 'ghostscript' shows the same. > > My example was a little bit more complex, but I have reduced it to: > > __________________________________ > #!/bin/bash > AUS=ant_sites.ps > > REG=-R0/360/-90/90 > PRO=-JN0/15 > > pstext -V $REG $PRO tmp <<END > $AUS > 2.5 50.5 10 0 0 CT Amsterdam > -73.6 38.9 10 0 0 CT New York > END > > gv $AUS > ghostview $AUS > __________________________________ > > here 'gv' does only show the last line, while 'ghostview' shows all. -- Dr. Walter H. F. Smith, Geophysicist phone: 301-713-2860, ext. 126 NOAA Lab for Satellite Altimetry, code E/RA31 fax: 301-713-4598 1315 East-West Highway, room 3600 mailto:[EMAIL PROTECTED] Silver Spring MD 20910-3282 http://ibis.grdl.noaa.gov/SAT -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
