BOEWRT.DAT: Difference between revisions
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imported>Seiss Guntram (Description of processing of the CRS and "magic comments") |
imported>Schade Peter mNo edit summary |
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|name_de=BOEWRT.DAT | |name_de=BOEWRT.DAT | ||
|filetype=boewrt.dat | |filetype=boewrt.dat | ||
|version=September 2001 | |version=May 2014, classic version September 2001 | ||
|version_descr= | |version_descr=May 2014 | ||
|significance=contains measured or calculated time-series data for the usage in various programs. | |significance=contains measured or calculated time-series data in ASCII for the usage in various programs. | ||
=== | ===General remarks=== | ||
The file format is rather flexible | |||
The file has a header where meta data is identified by its position in the file, the first data line e.g. contains the node number. This is the classic boewrt.dat that can be processed by classical methods of BAW's io library. Since May 2014 the new boewrt.dat header can contain key-value pairs with additional meta data, the key Fill_Value is for example followed by a value in real format. The additional meta information is only evaluated by methods of BAW's io_dataset software package. | |||
Programs using the io and the io_dataset library can read the classical and the new version. The data part is for both the same and rather flexible; each of the ASCII time formats used by the BAW is allowed. But the date and time format with two digit year should not be used any longer. A ";" should be used to separate date and time from the values of the quantities. <br/> | |||
But the libraries interpret the meta information in a different way. <br/> | |||
===IO library preferrably for classic boewrt.dat=== | |||
This library can process additional information by evaluating environment variables. If the coordinate reference system is not given in the file, the value of the environment variable $BAWCRS will be assigned to the file content. | |||
When it is used, the century after $BAWCENTURY (inclusive) is assumed. You should specify $BAWCENTURY inside your environment (DEFAULT: 1900). | |||
<br />The time zone is used only, when the used begin or end date have a defined time zone.<br />For this case MEZ is assumed for the file, when the file contains no time zone!<br /> | |||
The reading procedure supports the coordinate reference System in the following manner:<br /> | The reading procedure supports the coordinate reference System in the following manner:<br /> | ||
If the environment variable $BAWCRS is set to a valid value (EPSG code), the station coordinate will be transformed to that system during the reading process on the fly. If the file CRS is not valid, the coordinate is used "as is". The user should set $BAWCRS when using the programs listed below.<br /> | If the environment variable $BAWCRS is set to a valid value (EPSG code), the station coordinate will be transformed to that system during the reading process on the fly. If the file CRS is not valid, the coordinate is used "as is". The user should set $BAWCRS when using the programs listed below.<br /> | ||
Revision as of 08:45, 6 May 2014
Basic Information
File-Type
boewrt.dat
File-Form
FORMATTED
Version
May 2014, classic version September 2001
Description-Date
May 2014
Significance of the File
contains measured or calculated time-series data in ASCII for the usage in various programs.
General remarks
The file has a header where meta data is identified by its position in the file, the first data line e.g. contains the node number. This is the classic boewrt.dat that can be processed by classical methods of BAW's io library. Since May 2014 the new boewrt.dat header can contain key-value pairs with additional meta data, the key Fill_Value is for example followed by a value in real format. The additional meta information is only evaluated by methods of BAW's io_dataset software package.
Programs using the io and the io_dataset library can read the classical and the new version. The data part is for both the same and rather flexible; each of the ASCII time formats used by the BAW is allowed. But the date and time format with two digit year should not be used any longer. A ";" should be used to separate date and time from the values of the quantities.
But the libraries interpret the meta information in a different way.
IO library preferrably for classic boewrt.dat
This library can process additional information by evaluating environment variables. If the coordinate reference system is not given in the file, the value of the environment variable $BAWCRS will be assigned to the file content.
When it is used, the century after $BAWCENTURY (inclusive) is assumed. You should specify $BAWCENTURY inside your environment (DEFAULT: 1900).
The time zone is used only, when the used begin or end date have a defined time zone.
For this case MEZ is assumed for the file, when the file contains no time zone!
The reading procedure supports the coordinate reference System in the following manner:
If the environment variable $BAWCRS is set to a valid value (EPSG code), the station coordinate will be transformed to that system during the reading process on the fly. If the file CRS is not valid, the coordinate is used "as is". The user should set $BAWCRS when using the programs listed below.
Files of type boewrt.dat may contain three Special comments at the top, which contain Minimum and Maximum time step and the FORTRAN Format of the data records. These comments are used to accelerate the reading procedure, when data are in ascending order in time and the records are uniformly formatted. On failure of reading a file, these comments should be erased. Files manipulated by an Editor should never contain these comments!
File-Contents (in Catchwords)
- nodenumber and (optional) timezone and coordinate reference System (CRS). This record has to be written FORMATTED with FORTRAN-Format "(I10,1X,A4,1X,A5)". Preferably you should use known abbreviations for the time zones ("CET", "CEST", "UTC"). For the coordinate reference system of the station coordinate the EPSG codes used by BAW (see at GEOTRANSFORMER for example) should be used.
- name of the Location (written with FORTRAN-Format "(A)").
- coordinates (x,y,z) of the Station position (unformatted with separating blanks!)
- number and type-codes for the physical quantities stored in the file (FORTRAN-Format "(I10,nI8)".
- date, time and data for each time-step stored. Preferably the date and time should be separated from the physical values by a ";"-character.
Programs using this Type of File
EVENTFILTER, EXCELENZ, EXKNO, FD2MET, FRQWF, GEOTRANSFORMER, GVIEW2D, HVIEW2D, MESKOR, ROSE, TIDKEN, TSCALC, UNTRIM2007MONITOR, UTRRND, VVIEW2D, XTRDATA, ZEITRIO
Example-File
$PROGHOME/examples/zeitrio/boewrt.new.dat
$PROGHOME/examples/zeitrio/boewrt.dat
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