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5.1.1 Image Command Examples - Display
The IMGDISP and IMGMAG commands are used to display imagery. Three of IMGLIST's keywords (BAND, TIME and DAY) can be used with IMGDISP.

  1. Display the latest GOES-East IR image on the current frame.

    By default, the upper left corner of the image is placed in the upper-left corner of the frame.

  2. Use the keywords LATLON, LINELE, STATION and PLACE to specify a different image or frame position. Use the REFRESH keyword to draw a map on top of the display. (The MAP command will be covered later).

    This entry displays the second most recent image in dataset G8/VIS-CONUS on the current frame, with St. Louis placed at the center of the frame. The default annotation at the bottom of the frame is replaced with the text GOES-8 Visible Centered on St. Louis in foreground brightness level 200 and background brightness level 10. A map of the state outlines is overlain on top. Note that the previous image is erased when the new one is loaded.

    This entry displays the image in position 5 in dataset RTIMAGES/GE-VIS (GOES-East Visible) on the current frame, with earth coordinate 38:45N 090:22W (the lat/lon of St. Louis) placed at the upper-left corner of the frame. The map from the previous command is erased (EG) and a new map is drawn.

    The default for PLACE is CENTER when LATLON and STATION are used and ULEFT when LINELE is used. LINELE is the default if no other positioning keyword is specified (see example 1 above).

  3. Use the keyword MAG to blow up or blow down the image. Use the positional parameter for the frame to specify that the image should be displayed on a frame other than the current frame. Use the SF keyword to flip to the frame after the image has loaded.

    This entry displays the latest GOES-East IR image on frame 3, centered at 32N, 82W blown down by a factor of 2. After the image is loaded, frame 3 is displayed.

    This entry displays the 13 UTC GOES-West Water Vapor image centered over San Francisco on frame 2 and flips to that frame after loading. A map is drawn so you know where you are.

  4. Use the ALL or REPEAT keywords to load multiple images.

    This entry displays up to 3 images in dataset BLIZZARD/M3-VIS, with Washington, DC placed at the center of each frame. If BLIZZARD/M3-VIS contains more than 3 images that meet the search criteria, the three most recent images are displayed in time order on frames 1 through 3. If BLIZZARD/M3-VIS contains 3 or less images that satisfy the search conditions, all images in BLIZZARD/M3-VIS are displayed in time order with the oldest image on frame 1. The second entry will loop the images.

    This entry displays three consecutive images in dataset RTIMAGES/GW-WV, with 32N, 130W placed at the center of each frame. The images in positions 1, 2, and 3 are displayed on frames 4, 5, and 6 respectively. With REPEAT, there is no assurance that the images will be time ordered. The DR AUTO will ensure that the pause is on the latest image.

  5. Use the IMGMAG command to redisplay an image at a position or a different resolution.

    This entry flips to frame 1 and then redisplays the image in the current frame with a new center point. This point is chosen by moving the cursor and clicking the right mouse button or pressing Alt G . The magnification factor is not changed.

    This entry redisplays the image in the current frame on frame 2 using a line blowup factor of two and an element blowup factor of three. The geographic coverage of the output image is selected by moving the cursor and clicking the right mouse button or pressing Alt G. The new display is shown upon completion.

 


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