Image Command Examples

Previous: Examples of Displaying/Manipulating Images

5.1.0 Image Command Examples - Listing

Start a McIDAS session.

For McIDAS-X, at the Unix prompt:

Type: mcidas

Your session should still be set for six frames from the last time you edited your .mcidasrc file. If not, set it for six frames, as described in Getting Started.
Log on and initialize the workstation.

Type: LOGON initials project I
List the ADDE groups you have access to on your system.
The names of the groups listed might indicate the type of data contained in it (ex: RTIMAGES is the group for real-time images).
If your listing doesn't contain an entry labeled RTIMAGES use DATALOC to tell McIDAS where to look.
List the image datasets available in the RTIMAGES group
The IMGLIST command can be used to list out information on image datasets. By specifying just the dataset name, you will get information on the latest image in the dataset.
The position portion of the ADDE dataset can be used to list out a particular image or several images. A position greater than zero represents an absolute position in the dataset; a position less than or equal to zero represents a relative position in the dataset based on image time, for example, 0 is the most recent and -1 is the next most recent; the position ALL represents all positions in the dataset list out all images in the dataset. (Be careful using ALL - there maybe be several hundred images in a dataset. The DSINFO listing will tell you how many images are in a particular dataset).
Some McIDAS images can have more than one digital band in them. Use the FORM=BAND keyword to list out band information with IMGLIST. For multi-banded images, use the BAND= keyword to list information about a particular band.
Note that for each band, the resolution at the sub-satellite point and image size (lines x elements) is displayed.
The TIME= and DAY= keywords can be used to specify a particular image or images.