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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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.
>From: Gary Cunning <address@hidden> >Organization: NCAR/RAP >Keywords: 200011061722.eA6HMI408974 GOES imagery Gary, >I have recently ran into to a problem with mcidas. When I try to run the >imgremap command I get an error message. I recall that I was able to run >imgremap at an earlier time .For example: > >IMGREMAP GV4.3 MI.1 LATLON=35 93 PRO=LAMB 25 25 95 >IMGREMAP: Failed to acquire memory to store source image This is telling you that your system doesn't have either enough disk space or shared memory to do the operation. >Here are my aliases: > >AKA >Alias Name Group/Descriptor >-------------------- ---------------------------------------- >GI4A GOES8/IR4KM >GI4B GOES8/IR4KM2 >GI4C GOES8/IR4KM5 >GV4 GOES8/VIS4KM2 >MI MYDATA/IMAGES >AKA -- done Hmm... I am suprised that you don't have enough memory to create a Lambert Conformal representation of a 4km VIS image. How large is the original image? Also, the default output resolution shown by the online help for IMGREMAP is '1': HELP IMGREMAP IMGREMAP -- Remaps an image into a different projection IMGREMAP sdataset ddataset <keywords> Parameters: sdataset | source ADDE dataset name and position; specify as alias.position or group/descriptor.position; to use default position, either enter "0" or omit .position portion (no def for alias or group/descriptor, def=0 for position) ddataset | destination ADDE dataset name and absolute position; specify as alias.position or group/descriptor.position; only positive integers are valid for the position number Keywords: ********************* Image Selection Keywords ************************* DAY= | selects the most recent sdataset image from the specified day (def=most recent image) TIMe=btime etime | selects the most recent sdataset image in the specified time range (def=most recent image) MAG=lmag emag | line and element reduction factor to apply to source data before it's remapped; valid range is 1 through -999 where 1, 0, and -1 mean no reduction, -2 means a 2x reduction, etc; see Remarks (lmag def=1, emag def=lmag) *************************** Output Keywords **************************** BANd= | image band number (def=existing band if image is single-band; no def if image is multi-band) ID= | NIDS station ID; valid only with Unidata NIDS ADDE server LATlon= clat clon | center latitude and longitude for ddataset (def=center latitude and longitude of sdataset) STAtion= | station ID, e.g., MSN, YSSY, 72201 to place at center of remapped image MERge=YES | merge data in sdataset with what is in ddataset; valid only with PRO=DEST =NO | overwrite data in ddataset (def) PRO=DEST | use the navigation of ddataset (def) =LAMB slat1 slat2 slon | Lambert Conformal, standard latitude and standard longitude (slat1 def=30, slat2 def=50, slon def=center longitude) =MERC slat | Mercator projection and standard latitude (slat def=0) =MOLL slon | Mollweide projection and standard longitude (slon def=0) =PS slat slon | Polar Stereographic projection, standard latitude and standard longitude (slat def=60, slon def=center longitude) =RADAR rot | Radar projection and rotation angle (rot def=0) =RECT | Rectilinear projection =SIN | Sinusoidal Equal Area projection =TANC slat slon | Tangent Cone projection, standard latitude and standard longitude (slat def=30 if center latitude is in northern hemisphere, -30 if center latitude in southern hemisphere; slon def=center longitude) RES= | resolution of ddataset in km; not valid with PRO=DEST (def=1) SIZe=line ele | number of lines and elements in ddataset; the 'ele' value must be a multiple of 4; SIZE is not valid with PRO=DEST (def=480 640) =ALL | creates an image large enough to include entire geographical coverage of sdataset SMOoth=limb data | provide limb or data smoothing, where: limb - NO or YES for limb smoothing (def=NO) data - NO or YES for data smoothing (def=NO) SPLine= | spline size in image pixels; range is at least 1 to 100; the range minimum may be computed base on source data (def=20) You probably want to keep the output resolution the same as the input, so you should add the RES=4 keyword to your invocation. >I have tried logging out of my account and rebooting my computer. But >neither actions help resolve the problem. How much memory does your machine have? This is a Linux box, true? If so, you can use o top or o run 'cat /proc/meminfo' and look for the line that defines 'MemTotal:' Please don't think that Linux necessarily sees all of the memory installed in your workstation; it might not. If it doesn't, your system administrator will have to take steps to tell Linux to recognize all of the memory that you have installed. You can find support-user discussions on this and other McIDAS issues at: http://www.unidata.ucar.edu/glimpsedocs/ghmcidas.html In the case of shared memory for Linux, use shared and/or memory and/or Linux as your search key(s). For instance, 'shared memory, Linux'. Tom