Differences between revisions 7 and 9 (spanning 2 versions)
Revision 7 as of 2016-07-24 06:41:05
Size: 1542
Editor: BMittan
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Revision 9 as of 2021-11-30 17:10:09
Size: 1735
Editor: JohnWeirich
Comment:
Deletions are marked like this. Additions are marked like this.
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 '''Column 1''' - Position in x '''Column 1''' - Position in x
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 '''Column 2''' - Position in y '''Column 2''' - Position in y
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 '''Column 3''' - Position in z '''Column 3''' - Position in z
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 '''Column 4''' - Sigma values '''Column 4''' - Sigma values - JRW edit: densify.f doesn't read INIT_LITHOS.TXT, and multiplies a value by 1000 right before writing out SIGMA.TXT, so I'm fairly confident that the units are always meters.
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''(Updated by JRW)''

SIGMA.TXT

Description

This text file is essentially a copy of the most recently made ICQ shape file SHAPE.TXT that includes an additional column of sigma values.

SIGMA.TXT is made by densify and is located in the SHAPEFILES/ directory.

Here is a sample SIGMA.TXT file:

         512
     0.00810     0.19764     0.13333         0.29844E-01
     0.00871     0.19742     0.13360         0.28206E-01
     0.00932     0.19721     0.13386         0.27425E-01
     0.00994     0.19700     0.13414         0.27743E-01
     0.01055     0.19677     0.13441         0.28415E-01
     0.01116     0.19655     0.13466         0.31917E-01
     0.01177     0.19633     0.13493         0.31631E-01
     0.01239     0.19615     0.13521         0.28469E-01
     0.01300     0.19594     0.13549         0.28856E-01

The output values are:

Line 1 - Q (resolution). This gives the number of nodes for i and j. Multiple Q by 6 coordinate vector spaces to fill out the entire region.

  • (!) Q*Q*6 is the total number of nodes, and line entries in this file.

    (!) A Q of 512 is the largest that we represent. It contains 1.5 million vertices and is 56 MB uncompressed.

Lines 2 and following - The location of a vertex in i, j, k space (Cartesian coordinates).

Column 1 - Position in x

Column 2 - Position in y

Column 3 - Position in z

Column 4 - Sigma values - JRW edit: densify.f doesn't read INIT_LITHOS.TXT, and multiplies a value by 1000 right before writing out SIGMA.TXT, so I'm fairly confident that the units are always meters.


(Compiled by TC) (Updated by JRW) CategoryFiles CategoryOutputFiles

SIGMA.TXT (last edited 2021-11-30 17:10:09 by JohnWeirich)