TreeGrOSS was started as an Open Source project of the department of Growth and Yield of the Forest Research Station of Lower Saxony in Germany. In 1990 there has been a major shift in Lower Saxony's silvicultural policy. This mainly means an increase in the percentage of hardwoods, natural regeneration instead of clear cutting, more mixed species stands and well structured stands. Consequently the Growth and Yield Department shifted the focus of research from the stand to the tree level and started working on a forest growth model based on single tree information of the experimental plots which a scattered over Northwest Germany. For practical application the forest growth model was integrated into a computer program to allow forest growth simulation. This program has been updated and extended in the past. It is used by the Forest Service and the public mainly for stand analysis, silvicultural strategy development, education and presentation. A special version is used to analyze and forecast permanent plot inventory.\n\nThe interest, the use and the demands of users have reached a point where the small development team of the forest growth simulator BWINPro is tied up by answering questions and making minor changes to optimize the program for special users. In order to get back to further development of additional packages the team has decided to start the Open Source project TreeGrOSS. This should enable users to optimize the program for there needs, verify the code, and -very important- integrate the growth model into company software. Since there has been a lot of interest in the growth simulator by forester's and researchers from other countries the Java code is documented in English. This hopefully will allow to use TreeGrOSS as an example or frame to save programming effort.\n\nAs a programming language Java was chosen. Java is an easy to learn and object oriented languages. Java programs are platform independent and do run on nearly all modern computer operating systems like, Windows, MacOS, Linux and Unix. In form of Java applets the programs can be also based on the internet. Another advantage of using the Java language is that the Java 2 Platform, Standard Edition (J2SDK) is provided at no costs by Sun Microsystems and that there is no need for an expensive development environment. In addition to the J2SDK you will only need a normal text editor. On the internet you can find a lot of free and helpful java programming examples and programing tutorials. So there is even for foresters no excuse, everybody can make use of the TreeGrOSS package.\n\n\n\n
When people finally started to realize that the single tree model BWINPro was more useful than the old yiedl tables, they wanted to use the model for more and more applications. At first BWINPro was used as a research tool. Then it got used for the development of forest strategies, forest planning, education, visualisation and landscape planning. By constantly adding new functions to satisfy the needs of the different users the the original growth model software BWINPro had become so complex that it was not possible anymore to develope it further. Consequently the TreeGrOSS project was started to convert the program into a component and object oriented software. Switching from ~Delphi-Pascal to Java was one step to split the software in packages and work more object oriented.\n\nThe major package is ''treegross.base'' holding all classes and methods for the forest simulation. The structure of this package is oriented on the single tree model for Northwest Germany. However by introducing interface classes for the main modeling processes and parameters like crown base, crown width, growth, mortality, ingrowth, etc. it is possible to plug in other regional models which might differ in species and their coefficients and even in functions used for modeling. In fact nearly every forest growth model can be integrated and profit from treegross packages. It is relatively easy to use the treegross.base package for an own software project. How this is done will be later shown in the documentation. \n\nThe additional packages treegross.standsimulation, treegross.stand3D, treegross.database and treegross.ksp make use of the base package and either provide an user interface, a 3 D visualisation, a data access or a special analysis tool. \n\n
[[Prof. Dr. Jürgen Nagel|]]\n[[Nordwestdeutsche Forstliche Versuchsanstalt|]]\nGrätzelstr.2\n37079 Göttingen\n\\n\nTel: 0551- 69401-125\nFax: 0551 - 69401-160
* Waldbewertung, Buchenholzaufkommen: Jan Hansen, ~NW-FVA\n* Küstentanne: Mark Geb, ~NW-FVA\n* Alnus: Jörg Schröder, ~Mecklenburg-Vorpommern\n* Brandenburg: Annett Degenhardt\n* ~Baden-Württemberg: Axel Albrecht, FVA ~Baden-Württemberg\n* El Salto: Benedicto Vargas El Salto Mexiko
Here you will shortly find a complete and hopefully understandable documentation of TreeGrOSS\n\n[[Background]]\n[[Concept]]\n[[PlugIns]]\n[[Species settings]]
The Forest Simulator ~BWINPro can be used to analyze and forecast forest stands. The Simulator is based on the Java classes of the TreeGrOSS project. Currently the Simulator comes with ~Plug-Ins for forests of:\n* Northwest Germany\n* Alnus in Northeast Germany\n* Pine Forest of El Salto Mexico.\nYou can switch the User Interface from German to English or Spanish.\n\nFor ''more information'' see: or\njoin the ''user group'':\n
Verantwortlicher gemäß § 10 Absatz 3 MDStV:\n\n\nProf. Dr. Jürgen Nagel\nGrätzelstr.2\n37079 Göttingen\n\n\nHaftungshinweis:\nTrotz sorgfältiger inhaltlicher Kontrolle übernehmen wir keine Haftung für die Inhalte externer Links. Für den Inhalt der verlinkten Seiten sind ausschließlich deren Betreiber verantwortlich. \n\n\nDiese Web-Seite wurde mit einem [[TiddlyWiki|]] erstellt. Dank an [[JeremyRuston|]]!\n\n
* Duda, H. (2006): Vergleich forstlicher Managementstrategien. Dissertation Universität Göttingen, S. 180 ( )\n* Vargas, B. (2006): Analyse und Prognose des Einzelbaumwachstums in strukturreichen Mischbeständen in Durango, Mexiko. Dissertation Universität Göttingen, Cuvillier Verlag Göttingen, S. 149. \n* Nagel, J.; Duda, H.; Hansen, J. (2006): Forest Simulator ~BWINPro7. Forst und Holz 61, Heft 10, S.427-429\n* Schmidt, M.; Böckmann, Th.; Nagel, J. (2006):The Use of Tree Models for Silvicultural Decision Making. In Hasenauer, H. (Ed.) Sustainable Forest Management, Growth Models For Europe, Springer, Berlin, Heidelberg. 237-261. , ~ISBN-10 3-540-26098-6\n* Schmidt, M.; Nagel, J.; Skovsgaard, J.-P. (2006):Evaluating Individual Tree Models. In Hasenauer, H. (Ed.) Sustainable Forest Management, Growth Models For Europe, Springer, Berlin, Heidelberg. 151-163. , ~ISBN-10 3-540-26098-6\n* Nagel, J.; Schmidt, M. (2006):The Silvicultural Decision Support System ~BWINPro. In Hasenauer, H. (Ed.) Sustainable Forest Management, Growth Models For Europe, Springer, Berlin, Heidelberg. 59-63. , ~ISBN-10 3-540-26098-6\n* Pretzsch, H. ; Biber, P.; Dursky, J.; Gadow, K.v.; Hasenauer, H.; Kändler, G.; Kenk, G.; Kublin, E.; Nagel, J.; Pukkala, T.; Skovsgaard, J.-P.; Sodtke, R.; Sterba, H. (2006):Standardizing and categorizing tree growth models. In Hasenauer, H. (Ed.) Sustainable Forest Management, Growth Models For Europe, Springer, Berlin, Heidelberg. 39-57 , ~ISBN-10 3-540-26098-6\n* Nagel, J. (2005): Vergleich der ~Buchen-Fichten-Mischbestandswuchsreihen aus Harz und Solling. Deutscher Verband Forstlicher Forschungsanstalten - Sektion Ertragskunde, Jahrestagung Freising 9.-11. Mai 2005, S.53-59.\n* Nagel, J. (2005): Softwarekomponenten unter Java. Deutscher Verband Forstlicher Forschungsanstalten - Sektion Forstliche Biometrie und Informatik, 16. Tagung Freising 4.-5. Oktober 2004, 33-37.\n* Nagel, J. (2005): TreeGrOSS eine Java basierte Softwarekomponente zur Waldwachstumsmodellierung für Forschung. Lehre und Praxis. Deutscher Verband Forstlicher Forschungsanstalten - Sektion Forstliche Biometrie und Informatik, 15. Tagung Freiburg 9.-10. Oktober 2003, 33-37.\n* Nagel, J. (2004): Nutzungsplanung in Rein- und Mischbeständen. Allg.Forst- u. J.Ztg., 175.Jg., (7/8) 150-156.\n* Nagel, J. (2004): Einsatz des Waldwachstumssimulators ~BWINPro in der Forsteinrichtung. Eds. Hanewinkel, M.; Teuffel v., K. : Waldwachstumsmodelle für Prognosen in der Forsteinrichtung. Freiburger Forstliche Forschung Berichte Heft 50 85-94\n* Sodtke, R.; Schmidt, M.; Fabrika, M.; Nagel, J.; Dursky, J.; Pretzsch, H. (2004) : Anwendung und Einsatz von Einzelbaummodellen als Komponenten von entscheidungsunterstützenden Systemen für die strategische Forstbetriebsplanung. Forstarchiv (75) 51-64.* Nagel, J.; Gadow von, K. (Hrgs): Forest Tools - Forstliche Software Sammlung. ~CD-ROM. Selbstverlag J. Nagel Göttingen ISBN 3-00- 009223-4\n* Nagel, J.; Schmidt, M. (2003) : The single tree model ~BWINPro, a keycomponent for silvicultural decision support . In Vacik H. et al [eds.]: Decision support for multiple purpose forestry. A transdisciplinary conference on the development and application of decision support tools for forest management, April 23-25, 2003, University of Natural Resources and Applied Life Sciences, Vienna, Austria, ~CD-Rom Proceedings, p. 1-9.\n* Nagel, J.; Albert, M.; Schmidt, M. (2002): Das waldbauliche Prognose- und Entscheidungsmodell ~BWINPro 6.1. Forst u. Holz 57, (15/16) 486-493\n* Pretzsch, H.; Biber, P.; Dursky, J.; Gadow, K. von; Hasenauer, H.; Kändler, G.; Kenk, G.; Kublin, E.; Nagel, J.; Pukkala, T.; Skovsgaard, J.P.; Sodtke, R.; Sterba, H. (2002): Recommendations for Standradized Dokumentation and Further Development of Forest Growth Simulators. Forstw. Cbl. 121, 138-151\n* Nagel, J. (2002): Das Open Source Entwicklungsmodell - eine Chance für Waldwachstumssimulatoren. Deutscher Verband Forstlicher Forschungsanstalten - Sektion Ertragskunde, Jahrestagung Schwarzburg 13-15. Mai 2002, S. 1-6\n* Guericke, M. (2001): Untersuchungen zur Wuchsdynamik von Mischbeständen aus Buche und Europ. Lärche (Larix deciduda, Mill.) als Grundlage für ein abstandsabhängiges Einzelbaumwachstumsmodell, Cuvillier Verlag Göttingen, S.220 (\n* Schmidt, M. (2001): Prognosemodelle für ausgewählte Holzqualitätsmerkmale wichtiger Baumarten. Dissertation Univ. Göttingen. S.302 (\n* Schmidt, M.; Spellmann, H.; Nagel, J. (2001): Waldwachstumskundliche Entscheidungshilfen zur Ästung der Douglasie. Allg.Forst- u. J.Ztg., 172.Jg., (7) 126-136\n* Nagel, J. (2001): Zur Genauigkeit von Ertragstafeln und dem Einzelbaummodell ~BWINPro. In: Akca, A.; Hoffmann, B.; Schumann, K.; Staupendahl, K.: Waldinventur, Waldwachstum und Forstplanung, Festschrift zum 60. Geburtstag von Prof. Dr. K. von Gadow. ~Zohab-Verlag S.145-151.\n* Nagel, J.; Albert, M.; Schmidt, M. (2000): ~BWINPro Programm zur Bestandesanalyse und Prognose. Handbuch zur Version 5.1. Niedersächsische Forstliche Versuchsanstalt Göttingen\n* Albert, M., (2000): Ein funktionalisierter Höhenergänzungsalgorithmus für Einzelbaumwachstumsmodelle. Jahrestagung des DVFFA Sektion Ertragskunde in Kaiserslautern.\n* Nagel, J. (1999): Konzeptionelle Überlegungen zum schrittweisen Aufbau eines waldwachstumskundlichen Simulationssystems für Nordwestdeutschland. Schriften aus der Forstlichen Fakultät der Universität Göttingen und der Nieders. Forstl. Versuchsanstalt, Band 128, J.D. Sauerländer's Verlag, Frankfurt a.M., S.122\n* Spellmann, H.; Nagel, J.; Böckmann, Th. (1999): Summarische Nutzungsplanung auf der Basis von Betriebsinventuren. Allg.Forst- u. J.Ztg., 170.Jg., (7) 122-128.\n* Albert, M. (1999): Analyse der eingriffsbedingten Strukturveränderung und Durchforstungsmodellierung in Mischbeständen. Hainholz Forstwissenschaften Band 6, Hainholzverlag Göttingen, 181S.\n* Windhager (1999): Evaluierung von vier verschiedenen Waldwachstumssimulatoren. Dissertation Univ. f. Bodenkultur Wien. 217S.\n* Windhager (1999): Vergleich von distanzabhängigen und unabhängigen konkurrenzbeschreibenden Faktoren und ihre Auswirkung auf den Grundflächenzuwachs. Allg. Forst- u. J. Ztg. 170 (7): 133-139\n* Böckmann, Th.; Saborowski, J.; Dahm, St.; Nagel, J.; Spellmann, H. (1998): Die Weiterentwicklung der Betriebsinventur in Niedersachsen. Forst u. Holz 53 (8): 219- 226.\n* Westphal, B. (1998): Beschreibung und Modellierung des Wachstums von ~Japan-Lärchen (Larix kaempferi) im Reinbestand. Dissertation Univ. Göttingen\n* Nagel, J. (1998): Zur Auswertung und Zuwachsprognose von permanenten Stichprobeerhebungen. Forst u. Holz, 53 (7): 197- 198.\n* Nagel, J. 1996: Anwendungsprogramm zur Bestandesbewertung und zur Prognose der Bestandesentwicklung. Forst u. Holz, 51 (3): 76-78
Northwest German Forest Research Station (Nordwestdeutsche Forstliche Versuchsanstalt). See
Version 7.1 is in preparation and will be hopefully released soon.\n\nTreeGrOSSTeam welcomes Matthias Albert back in the team\n\nThe newest software based on TreeGrOSS:\n* ForestSimulatorBWINPro\n* WaldPlaner\n\n
The TreeGrOSS package is devided in several sub packages:\n\n* ''[[treegross.base]]'' : Data classes and Basic classes for the growth simulation\n* ''treegross.standsimulation'': Additional classes special for the ForestSimulatorBWINPro\n* ''treegross.~Stand3D'' :: Three dimensional stand viewer \n* ''treegross.database'' : classes to connect with SQL - data bases
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Statistical forest growth models on a single tree basis are usually valid only for the region where the data to fit the model was collected. For the practical application of such a model a computer program is needed. Because such programs give the opportunity to simulate the growth of forest stands, they are are called forest growth simulators. The development of a forest growth simulator however takes quiet an effort. Consequently the TreeGrOSS software concept was developed in a way which allows to use this software for more than one forest growth model. This was achieved by introducing so called adapter or interface classes into the program. The adapter classes have empty standardized methods which correspond with the methods of the individual methods of the regional growth model. Using these interface classes it is relatively easy to plug in a growth model for another region into the software. So far three plugins for Alnus in Northeast Germany, Pines in El Salto (Mexico) and for Pine in Brandenburg have been published. \n\nAt the current development level of the program there are Interfaces for:\n* Competition\n* Crown base\n* Crown width\n* Growth\n* Mortality\n* Site index\n* Taper functions\n* Volume functions\n* Decay of dead wood\n\nIn most cases the tree or stand object is an input parameter of the interface method. That way all information about the tree and stand can be accessed in the methods. This offers possibility to use not only different coefficients but also integrate own functions and algorithms into the program.
The TreeGrOSS Source code is currently used for several software Products:\n\n* ForestSimulatorBWINPro for simulation of silvicultural strategies and the analysis single stands\n* WaldPlaner for the simulation and natural planning of a forest enterprise\n* SimWald a game to show the effects of siviculture to forest functions\n* VIS2006 a research plot analysis used by the nw-fva\n\nThe main ideas and needs for new code result from the programm ForestSimulatorBWINPro.
* The TreeGrOSS project is currently extended by classes to simulate the debris (dead) wood. The new class ~PlugInDecay is the adapter for the regional decay models. The class ~DecayOfRegion handles how the debris wood is processed during the simulation. The models need more testing and will be available soon.
''Simwald'' is a game which shows the forest dynamics and the effects of silvicultural treatments to forest functions. It has been used on several exhibts.\n\nMore information:
Official page
''TreeGrOSS'' Tree Growth Open Source Software
TreeGrOSS is an Open Source Software Project. This means that you can view and download the source code. You are also free to use and alter the code if you consider the terms of the General Public Licence (GPL). If you develop new functions for the TreeGrOSS Project you should consider sharing those with everybody. In order to do so, please get in contact with the TreeGrOSSTeam.\nThe ForestSimulatorBWINPro and the WaldPlaner as well as most TreeGrOSS source code is developed with the [[NetBeans|]] IDE. You can find a German introduction to the ForestSimulatorBWINPro and to the Netbeans IDE on [[ForestTools2|]] (key word: Material).\n\nYou can download the TreeGrOSS source code from the page of the Northwest German Forest Research Station: \n\nCode version 2006-12-19:
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TreeGrOSS (''Tree Gr''rowth ''O''pen ''S''ource ''S''oftware) is a Java based software package to analyse and forecast the developement of forest stands. The TreeGrOSS software was developed and is maintained by the Northwestern German Forest Research Station ([[NW-FVA|]] ) in Göttingen. \n\nIt can be used for forest \n* analysis\n* silvicultural scenario analysis\n* forest inventory prognosis\n* forest stand visualisation\n* and forest education.\n\nSince TreeGrOSS is an open project everybody can join it, use the software and fit the software to his or her needs. The SourceCode is available for download and therefore TreeGrOSS is no black box like many other software. The project profits from the comments, suggestions, critical remarks and the detection of errors by users. It makes it's greates progress by the cooperation of forest scientists. This is also the reason why the documentation of TreeGrOSS is in English language.\n\nCurrently the software package TreeGrOSS is enhanced in [[cooperation]] with several partners.
[img[J. Nagel|jnfoto.jpg]] [img[J. Hansen|jhfoto.jpg]] [img[S. Hentschel|shfoto.jpg]]\n''Active''\n* Jürgen Nagel //seit Beginn : Idee, Schwerpunkt ForestSimulatorBWINPro//\n* Jan Hansen //seit 2005: WaldPlaner//\n* Swen Hentschel //seit 2002: GIS , ~SilvaAqua//\n* Matthias Schmidt //stem taper and tree quality//\n* Matthias Albert //Climatic change//\n''Former Team Members''\n[img[B. Vargas|bvfoto.jpg]] [img[H. Duda|hdfoto.jpg]]\n* Benedicto Vargas 2003 to 2006 //Growth model El Salto, Mexico, Spanish interface//\n* Henriette Duda 2003 to 2006 //treatment package//\n* Matthias Albert //Version BWINPro 6, height variation, crop tree selection// \n* Susanne Schimpf // GUI routines//\n\nconsulting\n\n* Thomas Wutzler\n* Richard Zinck\n
''Versuchflächeninformationssystem''\n\nThe VIS2006 is an Informationssystem for Growth and Yield Experiment Plots. It is developed for the NW-FVA, but could be also used for other institutions. VIS2006 is based on the TreeGrOSS project and programmed in Java. It is connected to an MySQL-Database which holds the data of the experiment plots. VIS2006 can be also used to produce and handle temporary copies of single growth and yield experiments. These temporary copies are stored in an Access data file. VIS2006 is used for:\n* General information about the experimental plots\n* Data entry\n* Data extraction\n* Data correction\n* Standard evaluation of experiment plots\n* Stem map display and editing\n\nIf you are interested in VIS2006 contact the NW-FVA.
The Waldplaner is a software program to analyse the sustainability of forest functions on a forest enterprise level. With the program you can forecast the development of your stands under different silvicultural strategies and compare these. \n\nFor ''more information'' see:\nor get in contact with the [[NW-FVA|]]
The treegross.base package holds the main classes of the forest growth simulator and provides the adapter classes for the plug-in of growth models of other regions. The default growth model is the model for Northwest Germany of the [[NW-FVA|]] often referred to under the name ~BWINPro. The treegross concept is stand or plot based. Therefore the major class which holds all information is the class\n\nMain classes of the treegross.base package\n\n*\n**