CCSD3ZF0000100000001NJPL3IF0PDS200000001 = SFDU_LABEL
RECORD_TYPE           = STREAM
PRODUCT_CREATION_TIME = 1992-02-01
OBJECT                = TEXT
  NOTE                = "Notes on using the index table."
END_OBJECT            = TEXT
END

                 NOTES ON USING THE IMAGE INDEX TABLE
                       AND COVERAGE INDEX TABLE

The index table contains one row (record) for each image file on 
volumes 8 - 13 of the color MDIM series. Only the 64 pixel/degree
sinusodial projected images are listed in the index. Images in the
POLAR, shaded relief, lower-resolution MDIM, SPECIAL processing
sub-directories are not identified in the index.

 
The index table is formatted so that it may be read directly into many
data management systems on various host computers.  All  fields
(columns) are separated by commas, and character fields are  enclosed
in quotes.  Each record consists of 412 bytes, with a  carriage
return/line feed sequence in bytes 411 and 412.  This allows the table
to be treated as a fixed length record file on hosts which support
this file type and as a normal text file on other hosts.

The structure and content of the volumes 8-13 index table are
described  in file VOLINFO.TXT located in the DOCUMENT directory.  A
label coded in the Object Description Language (ODL), providing a
formal description of the index table structure, is located in file
IMGINDEX.LBL.

For personal computer users a DBASE DBF structure is also provided in
the file IMGINDEX.DBF.  This file should be copied to magnetic disk and
can then be used to load the IMGINDEX.TAB file into DBASE III or IV with
the following commands (assuming the MDIM CD-ROM is loaded in drive L:):

.USE IMGINDEX
.APPEND FROM L:\INDEX\DTMINDEX.TAB DELIMITED

Once the table is loaded into DBASE, it can generally be automatically
loaded into other data managers or spreadsheets which provide search and
retrieval capabilities.

The Coverage index (COVINDEX.TAB) provides the percent coverage of real
data of a given image tile. This table gives the percent data coverage
for all RED, GREEN, and VIOLET frames. Data coverage for synthetic green
frames are not provided.