Compact format

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The "Compact format" was a data format created by Richard Holmes, basically to save space back in the days when space was an issue on hard disks and for archive facilities. It is a non-standard format, but is output by default in some of Richard's programs (such as FMT). This format should NOT be used for storing data today. Better stick to the internationally accepted formats when possible according to the World Data Center for Paleoclimatology and the International Tree-Ring Data Bank.


The format is quite simple. See the example file below. The first line is header/meta-data for the tree-ring measurements: 93 years, inner ring of 1898, sample ID is ZOC01A. The code (26F3.0) states that 26 measurements exist per line and the measurement is in 3.0 format = 3.0 which would be 0.01 format without the decimal (decimals are superfluous, and the "-2" and "~" signify nothing that I could ever figure out). One advantage of this format was that the precision was independent for each sample. One could have 3.0 or 4.0 or 2.0 for that matter.

See also the appended Pascal code used for creating Compact format in the program Convert5.

      93=N    1898=I ZOC01A                                          -2(26F3.0)~
280234187226177190170135184166128151159175216189174178154159163189145186264165
116204222195191171152167155162140144126227228145144165133140127124101113127 97
 98103139110 89174149128157 95126127240249193131222241221262212226147265141228
245193243255121158279147 63128 94129100189183

write(outfile,(lastyr-firstyr+1):8,'=N',firstyr:8,'=I ',sitecode);
for x := 1 to (48 - length(sitecode)) do write(outfile,' ');
writeln(outfile,'-2(',line_length,'F',format_code,'.0)~');

The information above is from a contribution by Henri D. Grissino-Mayer on the ITRDB email forum on February 1 2008.

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