CCSD3ZF0000100000001NJPL3IF0PDSX00000001 PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 80 OBJECT = TEXT PUBLICATION_DATE = 1994-08-01 NOTE = "Notes on using the index tables and source F-BIDR tables." END_OBJECT = TEXT END NOTES ON USING THE IMAGE INDEX TABLES AND SOURCE F-BIDR TABLES The index table (INDEX.TAB) contains one row (record) for each image file stored on this FMAP Volume. The cumulative index table (CUMINDEX.TAB) contains one row (record) for each image file stored on this FMAP Volume plus all previously created FMAP Volumes. The source F-BIDR tables (nnzmmmOR.TAB, where nn is the center latitude of the tile rounded down to the nearest whole integer, z is N or S (North or South latitude), and mmm is the center longitude of the tile rounded down to the nearest whole integer) each correspond to a resampled version of an FMAP image tile and the value at each location in the table is equal to the revolution number of the F-BIDR used in the tile at that location. F-BIDR information is available for every 128th line and sample of the image tile starting at the first line and sample in the tile. Each FMAP image tile was produced using the most current version of the F-BIDRs available at the time of processing. The rows in the table represent lines in the tile and the columns represent samples. The index tables are formatted so that they 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 250 bytes, with a carriage return/line feed sequence in bytes 249 and 250. 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 F-BIDR tables are formatted so that they may be read directly into many data management systems on various host computers. All fields (columns) are separated by commas. The record lengths between tables vary because the tile sizes are not all the same. Each record contains a carriage return/line feed sequence in the last two bytes of the record. These tables can be treated as fixed length record files on hosts that support this file type and as normal text files on other hosts. A formal description of the index table structures is provided in the INDEX.LBL and CUMINDEX.LBL files. A formal description of the F-BIDR table structures is provided in the nnzmmmOR.LBL files. These files are coded in the Object Description Language (ODL).