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5.0.5 Satellite Imagery - Copying and Displaying Images
In this exercise, you will copy and display areas with the IMGCOPY and IMGDISP commands.

  1. Show frame 4, copy the first GOES-7 4km Vis image to position 1 in your MYDATA/TEST-IMAGES (AKA TI) dataset, and display the image on frame 4. The SIZE=ALL keyword copies the entire image to the destination dataset.

    Type: SF 4
    Type: IMGCOPY GV4.1 TI.1 SIZE=ALL;IMGDISP TI.1 4

  2. List the two image directories

    Type: IMGLIST GV4.1 FORM=BAND;IMGLIST TI.1 FORM=BAND

    Notice that the images now contain the same information and the image resolutions are the same.

    
    Image file directory listing for:GV4
     Pos Satellite/         Date       Time      Center      Res (km)   Image_Size  
         sensor                                 Lat  Lon    Lat   Lon               
     --- -------------  ------------  --------  ---- ----  ----- ----- ------------ 
       1  GOES-7        13 MAR 93072  17:01:00    26   87                           
        Band: 1   0.65 um Daytime cloud detection            4.0   4.0  1335 x 1608 
    
    Image file directory listing for:TI                                             
     Pos Satellite/         Date       Time      Center      Res (km)   Image_Size  
         sensor                                 Lat  Lon    Lat   Lon               
     --- -------------  ------------  --------  ---- ----  ----- ----- ------------ 
       1  GOES-7        13 MAR 93072  17:01:00    26   87                           
        Band: 1   0.65 um Daytime cloud detection            4.0   4.0  1335 x 1608 
    

  3. Show frame 5, copy the first GOES-7 4km IR image to the second position in your TI dataset, and display the image on frame 5 centered on Boston.

    Type: SF 5
    Type: IMGCOPY GI4.1 TI.2 STATION=BOS;IMGDISP TI.2 5

  4. List the two image directories.

    Type: IMGLIST GI4.1 FORM=BAND;IMGLIST TI.2 FORM=BAND

    In GI4.1, the image size is 1335 X 1608. Notice that the image size for TI.2 is 480 X 640 on image TI.2. If the SIZE=ALL keyword is not specified, a 480 by 640 image sector is copied to the new area (the size of the image frame).

    
    Image file directory listing for:GI4
     Pos Satellite/         Date       Time      Center      Res (km)   Image_Size  
         sensor                                 Lat  Lon    Lat   Lon               
     --- -------------  ------------  --------  ---- ----  ----- ----- ------------ 
       1  GOES-7 IR     13 MAR 93072  17:01:00    26   87                           
        Band: 8  11.2 um Night cloud detection, sfc temp     4.0   4.0  1335 x 1608 
    
    Image file directory listing for:TI                                             
     Pos Satellite/         Date       Time      Center      Res (km)   Image_Size  
         sensor                                 Lat  Lon    Lat   Lon               
     --- -------------  ------------  --------  ---- ----  ----- ----- ------------ 
       2  GOES-7 IR     13 MAR 93072  17:01:00    42   71                           
        Band: 8  11.2 um Night cloud detection, sfc temp     4.0   4.0   480 x  640 
     
    

  5. Show frame 6, copy the latest GOES-7 4km Visible image to TI.3 centered on Mobile, Alabama, and increase the resolution by a factor of 2. Display it on frame 6.

    Type: SF 6;IMGCOPY GV4 TI.3 STATION=KMOB MAG=2;IMGDISP TI.3 6

    The image is displayed on frame 6 with a resolution of 2 km.

  6. List the two images to compare image resolutions. Note that the lat and lon resolution values are different between the images.

    Type: IMGLIST GV4 FORM=BAND;IMGLIST TI.3 FORM=BAND

    The original image (BLIZZARD/G7-VIS-4K.3) had a resolution of 4 km and the new area (TI.3) has a resolution of 2 km. This is a blow up.

  7. Display a loop of Meteosat images from 17 to 18 UTC on frames 4 through 6 and use the REFRESH keyword to plot a high resolution map on each of the images.

    Type: IMGDISP BLIZZARD/M3-IR TIME=17 18 ALL=4 6 REFRESH='MAP VH GRA=(GRA) IMA=(IMA)'

    Notice that the numbers placed into the MAP command's GRA and IMA keywords take the place of (GRA) and (IMA) and now match the image frame numbers of the loop.

 


Previous: Satellite Imagery - Changing the Image Resolution Next: Satellite Imagery - Manipulating Images Table of contents Index Glossary Images Frames ITC-NGIC McIDAS-X Training Workshop > Imagery Display and Analysis > Satellite Imagery