As another example of procedural issues caltrans has

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As another example of procedural issues, Caltrans has used slightly different data-entry routines than as required by NABOOK. The following table was provided by Caltrans, and compares the Caltrans procedures versus the NABOOK procedures. Version 1.10 (October 28, 2004) Page 24 of 36 6/14/2018 2:20 AM
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Each of these “Codes” is contained in a “41” record, however, they are not in the required arrangement for NABOOK to process them correctly. The following example is a valid NABOOK format: 410003+00000001 42 .... +00061803 43 .... +00000011 44 .... +00003003 45 .... +00000001 410004+00000002 42 .... +00092247 43 .... +00000016 44 .... +00026487 45 .... +00026901 410005+00000011 42 .... +00000835 43 .... +00000001 44 .... +00000070 What is shown here are “41” records for Codes 1, 2, and 11. These codes should follow line 1 ( 410002+? ...... 1) as described above, and should precede the observations in the raw data file. In line 2 you see the date (June 18 2003), the observer code (11 – each different observer gets his/her own number), the instrument type (called 3003 here, although it was actually a DNA03) and a code indicating that the temperature measurements were made using the Fahrenheit scale. The third line refers to the instrument serial number, collimation error and rod serial numbers and the fourth line to the start time, rod on mark and temperature. This information should be entered by the instrument person as the leveling is being run and must be arranged in this order. If not, it will be necessary to edit the data file (refer to NABOOK documentation for detailed explanation of codes and formats). During leveling an additional possible problem has to do with the NABOOK procedure of requiring no earth-curvature correction and using “standard” accuracies instead of “enhanced” accuracies. This number should be “0” (no curvature correction used and no Version 1.10 (October 28, 2004) Page 25 of 36 6/14/2018 2:20 AM
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enhanced accuracy) in all level runs and is set in the configuration menu in the level. You can tell whether or not the no-curvature correction was used by looking at each rod reading (refer to Leica instrument manual). Here’s an example: 110006+00000014 32..00+00029980 3311 6 8+00082104 52..08+0003+009 110007+00000379 32..00+00029660 3321 6 8+00163394 52..08+0003+006 The red numbers (6) in Position 5 above indicate that the reading was measured without the earth-curvature correction, but with enhanced accuracy. This particular digit should be 0. Consistency in field procedures should be foremost in these projects. One of the submitted projects used varying choices in different segments of the project, e.i., in one case both the curvature correction and enhanced accuracy were chosen, in some cases only one of the two and in some cases neither. (The digit in the 6 th place (8) indicates that the reading itself is made to the .01 millimeter precision.) One more requirement for the raw data file (as far as NABOOK is concerned) is that no record may exceed 80 characters in length. Records exceeding this length will always be empty beyond the 80 th character place, and surplus characters may be safely deleted.
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