This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
The SFPARM definition you will want to use if "sgnl", with an optional marker design appended (SFPARM = sgnl;mark:1.1.1) Here's an example of what I use for SFMAP AREA = dset GAREA = usnps SFPARM = sgnl;mark:1:1:1 DATTIM = first SFFILE = nldn COLORS = 0;30 MAP = 6 MSCALE = 0 CLEAR = y DEVICE = XW PROJ = str/90;-100;0 I start with DATTIM = first for SFFILE = nldn (which points to $GEMDATA/nldn/20121025HHMM.gem) because the file may not have data for the last 5-minute period in the 30-minute file (where DATTIM=last would equate to 1855 UTC if the 1830 UTC file is being read before 1855 UTC). This can all be checked for in a shell script with the program "sfctime", which will report the available times in a GEMPAK surface file: > sfctime nldn 121025/1830 121025/1835 121025/1840 121025/1845 Hopefully this will help set you right on displaying NLDN data. Best, Michael James > We are ingesting and decoding nldn data from Albany. > > I am trying to use gempak to display the data. Any ideas? > > I used SFMAP with > > clear='y' > sffile=/data/data/nldn/201210221800_nldn.gm > area = ca (also tried us) > garea = ca > sfparm= (found in script on your pages somewhere) > dev= xw (this displays the map, but no lightning data) > map=1 > marker=20/2/.1/4/hw > proj=nps > r > > e > > > I also tried listing with > SFLIST > but it doesn't like that I don't list a sfparm > > Thanks > Marty Leach > > Ticket Details =================== Ticket ID: IPF-563953 Department: Support GEMPAK Priority: Normal Status: Open