Macintosh Software 


	This directory contains Macintosh applications for decompressing the compressed images on the Kilauea Disc set and for displaying the decompressed images on a Macintosh with an 8-bit color display.

	Both the decompress and image display applications are stored in the self-extracting Stuffit file called MACSW.SIT.  To extract the applications double-click on the MACSW.SIT icon.  You will be prompted for a directory on your hard disk where the folder MACSW is to be placed.  This folder will contain the MacCompress3.2 and Image4pds applications, as well as the Kernels and Palettes folders which are used with Image4pds.

                           NOTES FOR USE OF MACCOMPRESS3.2

	MacCompress3.2 assumes that all compressed files are named according to the Unix compress standard, which REQUIRES all compressed files to end with a '.Z' extension.  However, for the sake of consistancy all of the compressed images on this disc set are named with a '.imq' extension following the Planetary Data System (PDS) standard.  Therefore, before a compressed image file can be decompressed, it MUST be copied to your hard drive and renamed.  The '.imq' extension MUST be replaced with a '.img.Z' extension.

Example:
	1. Copy the file 'kil01t1.imq' to your hard drive.
	2. Rename the file 'kil01t1.img.Z'
	3. Run MacCompress to decompress the image file.  This will
	    automatically replace the compressed file with a
	    displayable image named 'kil01t1.img'.

Please refer to the Help Menu in the MacCompress3.2 application for instructions on how to use the program.

                             NOTES FOR USE OF IMAGE4PDS

	This version of Image4pds has been modified to display images with PDS labels.  Therefore, after decompressing each image, its corresponding label file must ALSO be copied to your hard drive before you can display the image using Image4PDS.  However, the .lbl files on the CD-ROMs refer to the COMPRESSED images and do not contain the correct data for the decompressed images.  This means that after decompressing the image and copying the label file to your hard disk, you MUST change the label file so that it correctly refers to the decompressed image.  To do this, edit the label file and replace every instance of '.imq' with '.img'.
	Image4pds is set-up for use on an 8 MB Macintosh running Finder.  Users with 4 MB Macintosh systems may have to edit the 'PREFERENCE' settings in the 'OPTIONS' menu of IMAGE and reduce the size of the undo and clipboard  buffers to 100K in order to display some of the larger images.  NOTE: Some of the images contained on these CD-ROMs are enormous.  It may be impossible to display these larger images using Image4PDS on systems that do not have a very large amount of RAM.
	Image should be run under Finder for best results.  When running under Multifinder, the memory allocated to Image should be set as high as possible, using the Macintosh 'Get Info' command in the 'File' menu.  To display the images use the 'OPEN' command in the 'FILE' menu to select the LABEL file (NOT the image file itself).  Refer to the Image manual for more information about program operation.