>From: Unidata Support <address@hidden> >Organization: UCAR/Unidata >Keywords: 200510212351.j9LNpI7s028398 McIDAS MAKEAREA MAKNAV Hi Mekonnen, Here is a quick update on your goal of importing ASCII data output by IDL back into McIDAS AREA files for visualization. In a previous response to you, I noted that the only work needed was a modification to the McIDAS application MAKNAV. I was overlooking the requirement that the data to be read by MAKEAREA be binary, not ASCII. The operative portion of the MAKEAREA online help (HELP MAKEAREA) is: Remarks: MAKEAREA converts a flat file of brightnesses (1, 2, or 4-byte data) into a 1-byte AREA scaling the data appropriately "flat file of brightnesses (1, 2, or 4-byte data)" means that the data needs to be 1, 2, or 4 byte integers. So, you will need to convert your ASCII output into binary files before they can be imported into an AREA by MAKEAREA. Is this possible? Also, I am curious about what calculations you made in IDL other than creating monthly mean temperatures? If that were the only calculation you made (which I doubt), you could have used IMGOPER directly on the AREA files you downloaded: HELP IMGOPER IMGOPER -- Applies mathematical functions to image data IMGOPER sdataset1..sdatasetn ddataset <keywords> "comment ... Creating an average (as opposed to mean) for multiple images is quite easy: IMGOPER MYDATA/IMAGES.2001 MYDATA/IMAGES.2002 MYDATA/IMAGES.2003 MYDATA/IMAGES.4000 COEF=0.333 This will divide the brightness values in the first three images by 3 and add them together (the default operation for IMGOPER is ADD). The result, stored in MYDATA/IMAGES.4000 is the pointwise average of the values of the first three images. Cheers, Tom -- NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.
NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.