--- Start of Idrisi List message Hi Everyone, I'm exporting an Idrisi image to ArcInfo by using the method below (found in the Listserve Archive): 1. Convert your IDRISI image to ascii in IDRISI using CONVERT; 2. Include an asciigrid format header at the front of the file; 3. arc asciigrid <imagename>.img gridname. The header should look something like this: ncols 2400 nrows 2400 xllcorner -1400000 yllcorner 3300000 cellsize 250 NODATA_value -1 My question concerns the cellsize value in the header. The image I'm exporting was originally a .bsq file with header (.hdr) and .bqw files included. The .bqw file contained the georeferencing information below: 27.66173669259481 = pixel dimension in x 0.09268151197408 = row rotation 0.17181249144738 = column rotation -28.80760444839433 = pixel dimension in y 144750.74912724213000 = x for upper-left pixel 9987437.64615854430000 = y for upper-left pixel As you can see, the pixel resolution is not the same in the x and y directions (27.66 vs. 28.8). What should I say as my "cellsize" in the ascii header? Will this be a big deal if I just use 28, and cause me lots of problems? If anyone has a better way of exporting to ArcInfo (or ArcView's spatial analyst), I'd be glad to hear it. Thanks in advance, Carolyn Matkovich __________________________________________________ Do You Yahoo!? Make international calls for as low as $.04/minute with Yahoo! Messenger http://phonecard.yahoo.com/ --- End of Idrisi List message IDRISI-L is an unmoderated list. As a service to list users, please post a summary of useful responses to your questions. To post a message to IDRISI-L, send it to [EMAIL PROTECTED] To subscribe to the list, send an email from the address to be subscribed to [EMAIL PROTECTED] with "subscribe" (without quotes) as the first line of the message body. To unsubscribe, do the same, only with "unsubscribe" as the first line of the message body. The list is archived at http://www.mail-archive.com/idrisi-l%40clarklabs.org/.
