5.1.1 Image Command Examples - Display
The IMGDISP and
are used to display imagery. Three of IMGLIST's keywords (BAND,
TIME and DAY) can be used with IMGDISP.
- Display the latest GOES-East IR image on the current frame.
Type: IMGDISP RTIMAGES/GE-IR
By default, the upper left corner of the image is placed in the upper-left
corner of the frame.
- 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
Type: IMGDISP RTIMAGES/GE-IR.-1 STATION=KSTL TEXT='GOES-8 Visible Centered on St. Louis' 200 10 REFRESH='MAP H'
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.
Type: IMGDISP RTIMAGES/GE-VIS.5 LATLON=38:45 090:22 PLACE=ULEFT REFRESH='EG;MAP H'
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).
- 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.
Type: IMGDISP RTIMAGES/GE-IR 3 LATLON=32 82 MAG=-2 SF=YES
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.
Type: IMGDISP RTIMAGES/GW-WV 2 STA=SFO MAG=2 SF=YES TIME=13:00 REFRESH='MAP H'
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.
- Use the ALL or REPEAT keywords to load multiple images.
Type: IMGDISP BLIZZARD/M3-VIS STA=KDCA TIME=17:00 18:00 DAY=13/MAR/1993 ALL=1 3 SF=YES REFRESH='EG'
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
Type: LB 1 3;DR 2*4 10;TERM L ON
Type: IMGDISP RTIMAGES/GW-WV.1 4 LATLON=32 130 REPEAT=3 SF=YES
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.
Type: LB 4 6;DR 2*4 10;DR AUTO;TERM L ON
- Use the IMGMAG command to redisplay an image at a position or a
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.
Type: IMGMAG 2 MAG=2 3 SF=YES
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.