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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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.
Hi Russ, Sorry for the silence over the weekend. I was preoccupied with a number of other things that prevented me from getting back to you on this... re: IMGDISP.CORE features are nice > Well thanks. Actually I had to remember what the heck > IMGDISP.CORE was used for. I haven't touched it in at least 10 years. Interesting. I haven't used the IMGDISP.(CORE|SITE|USER) capabilities much, but I found that they came in very handy when working on the new Nexrad Level III and TDWR radar products. Why? Because I found myself repeatedly displaying the Level III composite and overlaying it with radar IDs (STNPLOT TYPE=N). This was very easily done using IMGDISP.USER, so I started playing around with it for the display of the individual radar products. In doing so, I found myself wanting/needing to plot range rings on top of the displays to make sure that I had the navigation correct. That is when I ran into the two things that I talked about in my first email: the non-centering of the displayed image and the need to be able to tell CIRCLE where to center its plot. re: > Hmmmm.... I see what you mean. Maybe we could use > IMGDISP.CORE to "signal" IMGDISP to center the image on the value > specified in the ID= keyword. Maybe we could modify IMGDISP to check > for this signal and append the ADDE request prior to issuing the > transaction. What you think? I started to do exactly this. I ran into a few gotchas, so I decided to send you a note to get your input. re: LINELE=CENTER for CIRCLE > This one could be done in about 10 minutes. No brainer. Yup, I knew that it could, but I wanted to see if you had a different way of thinking about the object at hand. re: alternately a MODE=N (non-interactive mode) > > Not so sure about this one. I only mentioned this because I figured that you might have a different way of doing the same thing in mind. re: > Needless to say, I'd vote for the first suggestion, unless > you have a preference. Nope, the LINELE=CENTER would work nicely when the display is centered on the radar. One can make this happen now by specifying the ID= and STA= keyword on the IMGDISP command line, but I figured that the display of radar images is different from other images: it makes much more sense to center on the station than to plot using the upper left had corner in LIN,ELE space. re: > Fixing CIRCLE is easy. Its in MCRD, so I can mess with it as > much as I want. IMGDISP is CORE code so we actually need to get the > MUG to accept the change. Well, I am not willing/able to pay the MUG to accept the change for IMGDISP. Rather, I would simply roll the fix into the Unidata distribution and distribute it that way. I mention the cost because Dave S. asked me if monies from the Unidata subaward could be used for MUG testing of the mods I made to support the new Level III and TDWR products. I am a bit put off by that notion given that all of the code mods are being provided free-of-charge and they will help fulfill a request that SSEC McIDAS users made to the MUG for support of the new images. Cheers, Tom -- **************************************************************************** Unidata User Support UCAR Unidata Program (303) 497-8642 P.O. Box 3000 address@hidden Boulder, CO 80307 ---------------------------------------------------------------------------- Unidata HomePage http://www.unidata.ucar.edu **************************************************************************** Ticket Details =================== Ticket ID: CEY-749460 Department: Support McIDAS Priority: Normal Status: Closed