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software:gplates:grot:start [2020/09/17 20:21] – [Bibliography information] christian | software:gplates:grot:start [2021/07/28 16:51] (current) – [Rotation Line Data] christian | ||
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With the advent of GPlates 1.5 came the ability to read a new version of the rotation file format called '' | With the advent of GPlates 1.5 came the ability to read a new version of the rotation file format called '' | ||
- | |||
- | '' | ||
^ Revision | ^ Revision | ||
| 1 (svn: 1793) | 1.0 | 2012-05-11 | | | 1 (svn: 1793) | 1.0 | 2012-05-11 | | ||
+ | For the document revisions, please see the [[https:// | ||
- [[.: | - [[.: | ||
- [[.: | - [[.: | ||
- | |||
- | |||
===== Introduction ===== | ===== Introduction ===== | ||
Line 212: | Line 209: | ||
- | ====== File body: The rotation sequences ====== | + | |
+ | ====== File header elements ====== | ||
+ | |||
+ | New GPlates rotation files have a mandatory file header which must be present in all rotation files. The file header contains important information on how to processes different parts of the file and also carries important metadata, such as information on the Geological Time Scale used for rotations. The file header contains global metadata which are referenced in the file body. It adheres to specific format and contains mandatory attributes Apart from the mandatory metadata in the header, there are also optional blocks which allow the user to put revision information or any other data the user finds necessary. Future version of GPlates (> 1.3) will include the opportunity to edit this information through a GUI. | ||
+ | |||
+ | The file header follows the core elements of the Dublin Core metadata initiative which specifies 15 standard tags to identify electronic documents (see [[http:// | ||
+ | |||
+ | Let’s start out with the mandatory information in the file header, here’s the overview: | ||
+ | |||
+ | ===== Rotation file version ===== | ||
+ | |||
+ | The first line uses the '' | ||
+ | |||
+ | < | ||
+ | @GPLATESROTATIONFILE: | ||
+ | </ | ||
+ | |||
+ | <note important>'' | ||
+ | |||
+ | |||
+ | ===== Dublin Core document metadata ===== | ||
+ | |||
+ | The subsequent attributes use the '' | ||
+ | |||
+ | <note important>'' | ||
+ | |||
+ | < | ||
+ | @DC: | ||
+ | @DC: | ||
+ | @DC: | ||
+ | @DC: | ||
+ | @DC: | ||
+ | @DC: | ||
+ | @DC: | ||
+ | @DC: | ||
+ | @DC: | ||
+ | @DC: | ||
+ | @DC: | ||
+ | @DC: | ||
+ | @DC: | ||
+ | Watson, Turner (2012) The GPGIM vol:pp-pp, | ||
+ | J. Digitial Earth. doi: | ||
+ | @DC: | ||
+ | A sample rotation file in the new GPlates rotation file format v1.1 | ||
+ | |||
+ | Based on moving Indian/ | ||
+ | to 100 Ma and true polar wander corrected palaeomagnetic | ||
+ | | ||
+ | from 100 - 200 Ma. 250 Ma is the extent of this rotation model. | ||
+ | | ||
+ | with a switch to Wessel et. al. 2006 at 118.4 Ma | ||
+ | | ||
+ | </ | ||
+ | |||
+ | ==== Contributing authors ==== | ||
+ | |||
+ | The next mandatory block is the contributor information related to individuals who have worked on various parts of the rotation sequences. In order to correctly attribute contributions which have not made it into publications, | ||
+ | |||
+ | <note important> | ||
+ | |||
+ | Template | ||
+ | < | ||
+ | @DC: | ||
+ | </ | ||
+ | |||
+ | Example (single line) | ||
+ | < | ||
+ | @DC: | ||
+ | | ||
+ | </ | ||
+ | |||
+ | Example (multi line) | ||
+ | < | ||
+ | @DC: | ||
+ | Firstname Lastname | | ||
+ | first.last@example.com | | ||
+ | http:// | ||
+ | FooBar Research Group, BarFoo University""" | ||
+ | </ | ||
+ | |||
+ | ===== Bibliographic and reference section ===== | ||
+ | |||
+ | The next mandatory block encompasses the bibliographic or reference data valid for the file globally. The field contain a reference to a bibliographic data base in BibTeX format as well as to the GPlates Information Model (GPGIM) website and a base URL for the [[https:// | ||
+ | |||
+ | <note important>'' | ||
+ | |||
+ | The inclusion of mandatory bibliographic reference data allows a future use of GPlates in conjunction with hyperlinks (through the DOI) to a PICT PICT publication as well as direct links to a bibliographic companion database file: | ||
+ | |||
+ | < | ||
+ | @BIBINFO: | ||
+ | @BIBINFO: | ||
+ | @GPML: | ||
+ | </ | ||
+ | |||
+ | ===== Geological time scales ===== | ||
+ | |||
+ | One of the most important piece of metadata is information about the geological time scales (GTS) used to convert relative geological ages to absolute times. | ||
+ | |||
+ | <note important>'' | ||
+ | |||
+ | These GTS constantly evolve and a Base Aptian on some timescale from the 1990’s has a few Million Years difference to a Base Aptian from the 2010’s. The GTS are listed in the header section and are referenced through a tag at individual rotation level. | ||
+ | |||
+ | Template | ||
+ | < | ||
+ | @GEOTIMESCALE" | ||
+ | </ | ||
+ | |||
+ | Multiline specification of GTS | ||
+ | < | ||
+ | @GEOTIMESCALE""" | ||
+ | doi: | ||
+ | Gee.ToC.07 | | ||
+ | Gee, J.S. and Kent, D.V. (2012) 5.12 - Source of Oceanic \ | ||
+ | | ||
+ | | ||
+ | # | ||
+ | @GEOTIMESCALE""" | ||
+ | | ||
+ | | ||
+ | S. C. Cande and D. V. Kent. Revised Calbration of the\ | ||
+ | | ||
+ | J. Geophys. Res., 100(B4): | ||
+ | F. M. Gradstein, F. P. Agterberg, J. G. Ogg, J. Hardenbol, P. van Veen,\ | ||
+ | J. Thierry, and Z. Huang. A Mesozoic time scale. J. Geophys. Res.,\ | ||
+ | | ||
+ | # | ||
+ | @GEOTIMESCALE""" | ||
+ | | | ||
+ | | | ||
+ | | ||
+ | |||
+ | </ | ||
+ | |||
+ | ===== OPTIONAL: Revision history ===== | ||
+ | |||
+ | The optional revision history block is used for versioning. The actual list of applicable subattributes depends on the versioning system used. | ||
+ | |||
+ | <note important>'' | ||
+ | |||
+ | Each Keyword shouldbe shortened and prefixed by '' | ||
+ | |||
+ | < | ||
+ | @REVISIONHIST" | ||
+ | </ | ||
+ | |||
+ | <note warning> | ||
+ | |||
+ | |||
+ | |||
+ | ====== File body elements: The rotation sequences ====== | ||
The file body contains all data outside the file header. These are Moving Plate Rotation Sequences (MPRS) which are in turn composed of individual lines listing rotation parameters. | The file body contains all data outside the file header. These are Moving Plate Rotation Sequences (MPRS) which are in turn composed of individual lines listing rotation parameters. | ||
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^ Parameter name ^ Description ^ | ^ Parameter name ^ Description ^ | ||
- | |PID1 | Plate ID 1 (moving plate) | | + | |'' |
|'' | |'' | ||
- | |POLELAT | Rotation pole latitude | | + | |'' |
- | |POLELON | Rotation pole longitude | | + | |'' |
- | |ANGLE | Rotation pole angle | | + | |'' |
- | |PID2 | Fixed Plate, plate ID 2 | | + | |'' |
New optional meta data attributes from the dictionary can be added to the individual lines. Rotation metadata attributes The optional attributes follow the structure layed out in Sec. FIXME and can consist of the following elements: | New optional meta data attributes from the dictionary can be added to the individual lines. Rotation metadata attributes The optional attributes follow the structure layed out in Sec. FIXME and can consist of the following elements: |