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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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 George, re: > Thanks Tom help me to solve the setting problem of map.k with imgdisp.k. No worries. re: > Now I have other questions, > I use imgdisp to plot visible in a region > lat: 40 61 > lon -117 -87 In McIDAS, one does not specify the coverage region directly. Instead, one specifies a Lat,Lon point in the region (as either the center or upper left corner) and the size of the image (number of lines and elements). re: > The part of my script looks like > ... > DAY=... > TIME=... > mcenv <<EOF > imgdisp.k RTIMAGES/GE-VIS LATLON=70 138 PLACE=U DAY=$day TIME=$time MAG=1 1 > EU=IMAGE GRAY=YES SF=YES > map.k SAT 2 LALO 3 PRO=SAT FILE=OUTVHRES > frmsave.k X /home/u7/mcidas/TEST/${day}_${time}.gif > #erase.k > exit 0 > EOF One quick comment: the default size of the frame created by 'mcenv' is 480x640 Lines x Elements). It is most likely that you want larger frames for your displays. These are easily made by specifying the '-f' flag to 'mcenv'. For instance, to create a single 800x1000 frame, replace 'mcenv' above with: 'mcenv -f 1@800x1000 << EOF'. re: > First, the region generated is not exactly what I want, and there is a > "slant angle" of the visible imagery to the surface, but I'd like to look > straight down at the surface. In order to "look straight down at the surface", you would have to remap the image into a different projection (e.g., MERCator) first and then display the reprojected image. You can remap imagery into different projections using the IMGREMAP command. re: > Secondly, when I tried to change the "LATLON" more westerly or northerly, > there is no image. Try changing the PLACE= keyword to 'C' (center). The Lat,Lon specified in the LATLON= keyword will then be at the center of the display. re: > So my question are: > How to choose the right display region for my special request? Play with the size of the frame created by specifying the size through the 'f' flag to 'mcenv'. Change the PLACE= to center. re: > How to solve the "slant angel" problem? Investigate remapping the image into a different projection. re: > which dataset I should select? The dataset you will use will depend on what you want. Without knowing more about what you are trying to accomplish, I can't add much useful information about which dataset you should use. re: > Thank you very much. No worries. 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: WPI-477280 Department: Support McIDAS Priority: Normal Status: Closed