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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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: shivani shah <address@hidden> >Organization: ISRO/Ahmedabad >Keywords: 200612220621.kBM6LkXX020309 McIDAS IMGMAKE Kalpana Hi Shivani, re: >I have the Kalpana data in raw format. I tried the following command >to conv> ert it into McIDAS Area Format. >IMGMAKE ivhrr_kal_d20061026_s0006.raw MY/AREAS.1 1408 1408 PROFILE=KALPANAIR The XRD IMGMAKE utility will write the data values from the input file to the output dataset. In order to add navigation to the output dataset element, you must describe the navigation using the MAKNAV= or NFILE= keywords. since you did not include the contents of your profile file KALPANAIR, we have no way of knowing if it contains navigation information. For reference, Here are the portions of the IMGMAKE online help that talks about MAKNAV= and NFILE=: * NFILe=file format <parms>| source LALO navigation file name and format BINary or ASCii; see Remarks (def=X BIN) ... * MAKNAV=proj <parms> | make a navigation block based on a geographic projection, see Remarks (def=no projection) The Remarks: section has additional information: MAKNAV= creates navigation entry for the destination image based on a geographic map projection. Available navigation types with associated parameters are: proj parms ---- ------------------------------------------------------------- LAMB npl npe slat1 slat2 qlon size pole MERC eql eqe slat qlon size PS npl npe slat qlon size pole RADR cenl cene clat clon size rot RECT lin lat ele lon deglin degele SIN cenl cene clat clon size TANC npl npe slat qlon size MOLL eql eqe qlon size NOAA kepler day time tmsec orient flip where: cenl,cene - line (cenl) and element (cenl) of radar site clat,clon - lat (clat) and lon (clon) of radar site deglin,degele - degrees/line (deglin) and element (degele) ele,lon - image element (ele) of longitude (lon) eql,eqe - image line (eql) and element (eqe) of equator lin,lat - image line (lin) of latitude (lat) npl,npe - image line (npl) and element (npe) of pole pole - N(orth) or S(outh) pole (def=N) qlon - normal longitude (center) rot - rotation of radar picture (def=0) size - size of one pixel (km) at standard latitude - or map scale factor (ratio) slat - standard latitude (PS def=60, MERC def=0) slat1- standard latitude (LAMB def=30) slat2- standard latitude (LAMB def=60) kepler - name of 3-line Keplerian element file day - nominal DAY for image time - nominal TIME for image tmsec - time of first line to navigate [msec from DAY] orient - ascending(+1)/descending(-1) pass (def=+1) flip - inverted image flag (0-normal/1-flipped) (def=0) Use the NFILE keyword to create a LALO navigation from an input file which contains a latitude and longitude (west negative) for for each image element. ASCII type nav file: 1 lat/lon per text line NFILE= file ASC lap lal lop lol skip lap - latitude starting char position on a text line lal - latitude max char length lop - longitude starting char position on a text line lol - longitude max char length skip - number of text header lines to skip BINARY type nav file: 2x2D (lat/lon) array of 4byte floats NFILE= file BIN >I command runs successfully and creates a MAF(McIDAS Area File) which I >am able to display. But when I give the MAP command on this image frame >it says "MAP completed on frame 1" But no MAP is overlayed on the image. Without navigation information MAP will not know how to draw the map background. >So if somebody can guide me how to display the MAP on the MAF after >converting the raw image to MAF. Please check your profile file to make sure that it contains information necessary to navigate your image. If it does not, you must add it. This may or may not be possible depending on the projection of your original image. >Shivani Shah >Scientist,Meteorology and Oceanography GRoup >Space Applications Centre (ISRO) >Ahmedabad - 380 053 >phone : (O) (02717) 236110 > (079) 26916110 >email : address@hidden > address@hidden Cheers, Tom -- +----------------------------------------------------------------------------+ * Tom Yoksas UCAR Unidata Program * * (303) 497-8642 (last resort) P.O. Box 3000 * * address@hidden Boulder, CO 80307 * * Unidata WWW Service http://www.unidata.ucar.edu/* +----------------------------------------------------------------------------+