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Record Editor 0.62 (Default branch)
01-26-2009
Record Editor is a data file editor CSV (Comma/Tab delimited values) files and files where fields occupy fixed positions in a record. This program uses a record-layout definition to display the data file in a human readable form. It can handle PC (text and binary), Unix (text and binary), and native IBM mainframe (text and binary) file formats. It is similar to Net-Cobols Cobol-Editor or Compuwares FileAid. License: GNU General Public License (GPL) Changes:|
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X_INIT(1gmt) Generic Mapping Tools X_INIT(1gmt) NAME
x_init - Initialization of Cross-Over Data Bases. SYNOPSIS
x_init -I DESCRIPTION
The purpose of x_init is to create two key files that will be holding all the cross-over information for all the cruises tested. These files are called xx_base.b and xx_legs.b, and they will contain data for each cross-over and totals for each leg, respectively. x_init will create these two files in the current directory, and write out the fileheader with a 1 as the next record number in the case of xx_base.b. NB! Any previous files with the same names in the current directory will be erased, so use with caution. -I Must be present form initialization to take effect. BEWARE
Both files are binary and have fixed record lengths. The formats of the files are as follows: xx_base.b: Record length = 40 bytes. Rec # 1: fileheader Rec # 2: pairheader Next n recs: crossover-structure Rec # n+3: pairheader etc. The fileheader is a 40 byte character string where the last 10 bytes contains the record number of the last record in the file. The pairheader is a 40 byte character string which contains the names of the two legs in question and the number of COEs generated between them. The crossover-structure contains all the information for one COE, that is lat, lon, time along leg values of gravity, magnetics, and bathymetry at the cross-over point, the heading of track #1, and the heading of track #2. See program listing for more details on formats. The file is sequential in that new data are appended at the end of the file. xx_legs.b: Record length = 204 bytes. Each record contains the complete information for each leg that has been checked. The leg-structure contains fields like year of cruise, number of internal/external COEs for gravity, magnetics, and bathymetry, their means and standard deviations, and the best fitting regression lines, i.e. the dc-shifts and drift-rates computed from the time/error data points. See program listing for com- plete description of record format. SEE ALSO
GMT(1), x_system(1) REFERENCES
Wessel, P. XOVER: A Cross-over Error Detector for Track Data, Computers & Geosciences, 15, 333-346. GMT 4.5.7 15 Jul 2011 X_INIT(1gmt)