x2sys_reportgmt - Online in the Cloud

PROGRAM:

NAME

x2sys_report - Report statistics from crossover data base

SYNOPSIS

x2sys_report column TAG [ coedbase.txt ] [ ] [ [list] ] [ [corrtable] ] [ nx_min ] [ e|i
] [ [ region ] [ track ] [ [level] ]

Note: No space is allowed between the option flag and the associated arguments.

DESCRIPTION

x2sys_report will read the input crossover ASCII data base coedbase.txt (or stdin) and
report on the statistics of crossovers (n, mean, stdev, rms, weight) for each track.
Options are available to let you exclude tracks and limit the output.

REQUIRED ARGUMENTS

coedbase.txt
The name of the input ASCII crossover error data base as produced by x2sys_cross.
If not given we read standard input instead.

-Ccolumn
Specify which data column you want to process. Crossovers related to this column
name must be present in the crossover data base.

-TTAG Specify the x2sys TAG which tracks the attributes of this data type.

OPTIONAL ARGUMENTS

-A Eliminate COEs by distributing the COE between the two tracks in proportion to
track weight and producing (dist, adjustment) spline knots files for each track
(for the selected column). Such adjustments may be used by x2sys_datalist. The
adjustment files are called track.column.adj and are placed in the $X2SYS_HOME/TAG
directory. For background information on how these adjustments are designed, see
Mittal [1984].

-I[list]
Name of ASCII file with a list of track names (one per record) that should be
excluded from consideration [Default includes all tracks].

-L[corrtable]
Apply optimal corrections to the chosen observable. Append the correction table to
use [Default uses the correction table TAG_corrections.txt which is expected to
reside in the $X2SYS_HOME/TAG directory]. For the format of this file, see
x2sys_solve.

-Nnx_min
Only report data from tracks involved in at least nx_min crossovers [all tracks].

-Qe|i Append e for external crossovers or i for internal crossovers only [Default is
external].

-R[unit]west/east/south/north[/zmin/zmax][r]
west, east, south, and north specify the region of interest, and you may specify
them in decimal degrees or in [+-]dd:mm[:ss.xxx][W|E|S|N] format. Append r if lower
left and upper right map coordinates are given instead of w/e/s/n. The two
shorthands -Rg and -Rd stand for global domain (0/360 and -180/+180 in longitude
respectively, with -90/+90 in latitude). Alternatively for grid creation, give
Rcodelon/lat/nx/ny, where code is a 2-character combination of L, C, R (for left,
center, or right) and T, M, B for top, middle, or bottom. e.g., BL for lower left.
This indicates which point on a rectangular region the lon/lat coordinate refers
to, and the grid dimensions nx and ny with grid spacings via -I is used to create
the corresponding region. Alternatively, specify the name of an existing grid file
and the -R settings (and grid spacing, if applicable) are copied from the grid.
Using -Runit expects projected (Cartesian) coordinates compatible with chosen -J
and we inversely project to determine actual rectangular geographic region. For
perspective view (-p), optionally append /zmin/zmax. In case of perspective view
(-p), a z-range (zmin, zmax) can be appended to indicate the third dimension. This
needs to be done only when using the -Jz option, not when using only the -p option.
In the latter case a perspective view of the plane is plotted, with no third
dimension. For Cartesian data just give xmin/xmax/ymin/ymax. This option bases the
statistics on those COE that fall inside the specified domain.

-Strack
Name of a single track. If given we restrict output to those crossovers involving
this track [Default output is crossovers involving any track pair].

-V[level] (more ...)
Select verbosity level [c].

-^ or just -
Print a short message about the syntax of the command, then exits (NOTE: on Windows
use just -).

-+ or just +
Print an extensive usage (help) message, including the explanation of any
module-specific option (but not the GMT common options), then exits.

-? or no arguments
Print a complete usage (help) message, including the explanation of options, then
exits.

--version
Print GMT version and exit.

--show-datadir
Print full path to GMT share directory and exit.

EXAMPLES

To report statistics of all the external magnetic crossovers associated with the tag MGD77
from the file COE_data.txt, restricted to occupy a certain region in the south Pacific,
try

gmt x2sys_report COE_data.txt -V -TMGD77 -R180/240/-60/-30 -Cmag >
mag_report.txt

To report on the faa crossovers globally that involves track 12345678, try

gmt x2sys_report COE_data.txt -V -TMGD77 -Cfaa -S2345678 > faa_report.txt

REFERENCES

Mittal, P. K. (1984), Algorithm for error adjustment of potential field data along a
survey network, Geophysics, 49(4), 467-469.

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