1. General Model Information

Name: GROGRA - Growth Grammar Interpreter

Acronym: GROGRA


Main medium: terrestrial
Main subject: biogeochemistry
Organization level: Organisms
Type of model: 3D, individual-based
Main application:
Keywords: L system, Lindenmayer system,branching, growth grammar, morphology, sensitive grammar, tree architecture, structural model, formal grammar interpreter

Contact:

Dr. Winfried Kurth
Universitaet Goettingen
Abteilung fuer forstliche Biometrie und Informatik
Buesgenweg 4
37077 Goettingen, Germany
Phone: ++49-551-399715
Fax : ++49-551-393465
email: wkurth@ufobi4.uni-forst.gwdg.de

Author(s):

Dr. Winfried Kurth

Abstract:

contents of the model
Model shell for the interpretation and evaluation of transformation rules (extended Lindenmayer systems) describing the development of the morphology of plants (especially trees). The rules have to be specified by the user according to empirical data and botanical knowledge. - Furthermore, GROGRA contains analysis tools for branching structures.
principles of the model
Classical parametric L-systems were extended by

Author of the abstract: UFIS - Environmental research information system


II. Technical Information

II.1 Executables:

Operating System(s): DOS (3.2 to 5....); Irix 5.3, OSF/1(V.3.0), AIX, SunOS5 Type of computer: PC (386 to 586); UNIX-workstations: SGI Iris Indigo, DEC Alpha, IBM RS6000, Sun RAM required: 8 MB Disc space: 500 kB executable programm, about 5 MB auxilliary files (written by the program). Portability onto other systems: other UNIX variants, e.g. LINUX Peripherical software required: Borland BGI or SGI GL graphics or OSF Motifs, mouse driver List of files: grogra (resp. grogra.exe), executable, available from author upon request; lexpla.msg, online explanations, available from author upon request; grogra.col, colour table (for UNIX version only), available from author upon request; .lsy, nonsensitive grammars, several example files available from the author; *.ssy, sensitive grammars, several example files available from the author.

II.2 Source-code:

Programming Language(s): C

II.3 Manuals:

Manual: Kurth, Winfried: Growth Grammar Interpreter GROGRA 2.4 - A software tool for the 3-dimensional interpretation of stochastic, sensitive growth grammars in the context of plant modelling. Introduction and Reference Manual, Berichte des Forschungszentrums Waldoeko, 38, Goettingen (1994). Complete model documentation: Kurth, Winfried: Growth Grammar Interpreter GROGRA 2.4 - A software tool for the 3-dimensional interpretation of stochastic, sensitive growth grammars in the context of plant modelling. Introduction and Reference Manual, Berichte des Forschungszentrums Waldoeko, 38, Goettingen (1994).

II.4 Data:



III. Mathematical Information


III.1 Mathematics


III.2 Quantities


III.2.1 Input

III.2.2 Output


IV. References

Prusinkiewicz, Przemyslaw, and Lindenmayer, Aristid, 1990.
The Algorithmic Beauty of Plants., Springer, New York.

Kurth, Winfried, 1994.
Growth Grammar Interpreter GROGRA 2.4
- A software tool for the 3-dimensional interpretation of stochastic, sensitive growth grammars in the context of plant modelling. Introduction and Reference Manual.Berichte des Forschungszentrums Waldoekosysteme, 38.

Kurth, Winfried, 1994.
Morphological models of plant growth: Possibilities and ecological relevance.Ecol. Model. 75/76, 299-308.

Kurth, Winfried, and Lanwert, Dirk, 1995.
Biometrische Grundlagen fuer ein dynamisches Architekturmodell der Fichte (Picea abies (L.)Karst.). Allg. Forst- und Jagdzeitung (to appear)



V. Further information in the World-Wide-Web



VI. Additional remarks

The input variable 'stem profile specifications' can be supplied by the model GROBOL 1.0 (1994, D.Laenwert, Univ. Goettingen); The input variable 'geometrical specification of tree structure' by the model AMAP (1995, Ph. de Reffye et al., CIRAD, Montpeiller); The output variable 'geometrical specification of tree structure (coordinates, topological information, diameters, leaf areas for each shoot)' is used in the models HYDRA 1995, Th. Frueh, Uni Goettingen), MicroEnv (former 3 D Clip, 1992, Y. Knyazikkin & G. Miessen, Uni Goettingen), GROBOL 1.0, and AMAP as input.

Additional information
Last review of this document by: R.Patzak : 2. October 1997 -
Status of the document:
last modified by Tobias Gabele Wed Aug 21 21:44:44 CEST 2002

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