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Tucson format - Cybis Wiki

Tucson format

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(Basics of the Tucson format for ring width data)
(Unexpected examples)
 
Line 16: Line 16:
 
The missing data mark is actually not defined, though usually the mark "-999" is used within 0.01 mm files, and "0" in 0.001 mm files. See also Note 4 below!
 
The missing data mark is actually not defined, though usually the mark "-999" is used within 0.01 mm files, and "0" in 0.001 mm files. See also Note 4 below!
  
<br/>Note 1: The consequence of using the value 999 as a stop marker is that a measurement of 9.99 mm, in 0.01 mm units, has to be changed
+
<br/><b>Note 1:</b> The consequence of using the value 999 as a stop marker is that a measurement of 9.99 mm, in 0.01 mm units, has to be changed
 
into 9.98 mm (written value=998) or 10.00 mm (1000)! To avoid fooling any other software, it is probably best never to write the value "999" as measurement data also for files with 0.001 mm units!
 
into 9.98 mm (written value=998) or 10.00 mm (1000)! To avoid fooling any other software, it is probably best never to write the value "999" as measurement data also for files with 0.001 mm units!
<br/>Note 2: If 5 digits are needed for the year number, i.e. a core older than -999, the identity cannot be more than 7 alphanumeric characters.
+
<br/><b>Note 2:</b> If 5 digits are needed for the year number, i.e. a core older than -999, the identity cannot be more than 7 alphanumeric characters.
<br/>Note 3: An ITRDB specification of the Tucson format is available <ref>ITRDB's specification of the tucson format: http://www.ncdc.noaa.gov/paleo/treeinfo.html</ref>, though that specification cannot be
+
<br/><b>Note 3:</b> An ITRDB specification of the Tucson format is available <ref>ITRDB's specification of the tucson format: http://www.ncdc.noaa.gov/paleo/treeinfo.html</ref>, though that specification cannot be
 
fully trusted. E.g. it currently (2009-07-09) specifies the missing data mark to be 999, which value in reality is used as the stop marker.
 
fully trusted. E.g. it currently (2009-07-09) specifies the missing data mark to be 999, which value in reality is used as the stop marker.
<br/>Note 4: It seems that Cofecha is handling these two marks differently: When Cofecha runs over a -999 value, then the series is broken into two series by this mark.
+
<br/><b>Note 4:</b> It seems that Cofecha is handling these two marks differently: When Cofecha runs over a -999 value, then the series is broken into two series by this mark.
 
While a "0" value seems to be handled as an "absent" value which is just omitted from correlations. CDendro from version 8.2 will have a setting to make
 
While a "0" value seems to be handled as an "absent" value which is just omitted from correlations. CDendro from version 8.2 will have a setting to make
 
missing values marked as "0" also in .rwl files having 0.01 mm measurement units.  
 
missing values marked as "0" also in .rwl files having 0.01 mm measurement units.  
You can attain the same effect of unbroken series by changing the Decadal measurement unit to 0.001 mm and again write out your series to a .rwl file
+
You can attain the same effect of unbroken series by changing the Decadal measurement unit to 0.001 mm in CDendro and again write out your series to a .rwl file
 
before submitting it to Cofecha.
 
before submitting it to Cofecha.
  
Line 154: Line 154:
 
<br>Note: The germ21.rwl file contains another severe error (a missing line of data) that makes it unreadable to CDendro.''
 
<br>Note: The germ21.rwl file contains another severe error (a missing line of data) that makes it unreadable to CDendro.''
  
 +
 +
<pre>
 +
cc321201  0    0  3934  2736  2620  4184  4334  4438  4790  4968  5330 wb     
 +
cc321201  10  5008  1796  4786  3940  2762  1870  1804  1912  1588  1874 wb     
 +
cc321201  20  2634  1840  1994  2120  3334  1252  1206  1362  4186  1938 wb     
 +
cc321201  30  2090  530  1594  2492  1686  2064  518  2854  1426  1652 wb     
 +
cc321201  40  774  1080  1130  1248 -9999                              wb     
 +
cc321202  0    0  5022  4404  5402  4176  5676  2666  6004  5212  4262 wb     
 +
cc321202  10  2206  2928  1894  2458  4806  2846  2880  2354  2318  2550 wb     
 +
cc321202  20  2028  2178  2054  2230  2492  1756  1892  2730  1948  1922 wb     
 +
cc321202  30  1334  2016  1386  2154  1708  4396  1336  1742  502  2868 wb     
 +
cc321202  40 -9999                                                      wb      </pre>
 +
''From measurements performed on a Velmex machine and saved as time series in a decadal format
 +
<br>(The " wb" word at end of each line made CDendro versions before 8.1.2 reject the data.)
  
  

Latest revision as of 12:25, 11 January 2017

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