Difference between revisions of "LANDIS"
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| − | + | LANDIS represents landscapes as a grid of cells and tracks age cohorts of each species (presence/absence or biomass) rather than individual trees<ref>http://nrs.fs.fed.us/tools/landis/</ref>. Spatial resolution is flexible, generally 10-500 m pixel sizes<ref>http://web.missouri.edu/~umcsnrlandis/</ref>. | |
=== Type of information input from user (via GUI) === | === Type of information input from user (via GUI) === | ||
Revision as of 20:58, 19 September 2010
General System description
System Name: LANDIS
Brief overview
LANDIS is a spatially explicit landscape simulation model. It models natural processes, such as fire, wind, and insect disturbance; succession, and seed dispersal, as well as forest management.
Contents
Scope of the system
The purpose of LANDIS is to predict forest landscape change over long time periods. LANDIS was developed because previous forest simulation models were not suited for larger areas. Spatially explicit computer simulation of entire landscapes requires simulation at appropriate spatial resolution and level of mechanisms and processes that are modelled.
LANDIS is a spatially explicit landscape simulation model. It models natural processes, such as fire, wind, and insect disturbance; succession, and seed dispersal, as well as forest management. LANDIS is raster-based and tracks only presence or absence of tree species in a given age class. Disturbance events are simulated stochastically based on mean return intervals and disturbance size. [1]
System origin
LANDIS development began in the early 1990s under the direction of Dr. David Mladenoff, with partial funding from the Northern Research Station, Rhinelander, Wisconsin. Dr. Hong He joined the team in the late 1990s followed by Dr. Robert Scheller several years later. There are two currently supported versions of LANDIS which were developed with primary funding from the Northern Research Station of the USDA Forest Service.
LANDIS 4.0 is a fully modular software product with improved fire simulation and new capabilities for simulating fuel accumulation and decomposition and disturbance by biological agents such as insects and disease. Dr. He led the development of this version at the University of Missouri in collaboration with the Northern Research Station in Rhinelander, Wisconsin.
LANDIS-II is a completely re-engineered version developed at the Forest Landscape Ecology Laboratory, University of Wisconsin-Madison, in collaboration with the Northern Research Station in Rhinelander, Wisconsin. LANDIS-II was designed to advance forest landscape simulation modeling in many respects, including:
- allows for the incorporation of ecosystem processes and states (e.g., live biomass accumulation) at broad spatial scales
- has flexible time steps for every process,
- uses an advanced architecture that will significantly increase collaborative potential. [1]
Support for specific issues
- Landscape planning
Support for specific thematic areas of a problem type
- Silvicultural
Capability to support decision making phases
[Intelligence, Design, Choice, Monitoring [2]]
- Intelligence: LANDIS supportS understanding natural changes in ecosystem states
- Design: LANDIS allows creating various management simulations to understand how these affect ecosystems over time
Related systems
- LANDIS-II has taken an open source, modular design for which numerous extensions are available at http://www.landis-ii.org/exts
Data and data models
Typical spatial extent of application
Typically applied to large landscapes from thousands to millions of hectares.
Forest data input
LANDIS represents landscapes as a grid of cells and tracks age cohorts of each species (presence/absence or biomass) rather than individual trees[3]. Spatial resolution is flexible, generally 10-500 m pixel sizes[4].
Type of information input from user (via GUI)
- Biophysical
Models
Forest models
- Silvicultural
- Climate impacts
- Insects/Disease
- Fire
Social models
Social and economic impacts must be inferred from spatially explicit estimates of biophysical change.
Decision Support
Definition of management interventions
[Define what is available for the manager to intervene in the forest: time of harvest, plantations, thinnings, reconversions...Existence of prescription writer, simple enumeration of all possibilities, scenario simulation , etc.]
Typical temporal scale of application
- LANDIS is typically run for simulations from 10-1000 years.
- LANDIS-II has flexible time steps for every ecological process.
Types of decisions supported
Decision-making processes and models
- Simulation
Output
Types of outputs
Spatial analysis capabilities
Abilities to address interdisciplinary, multi-scaled, and political issues
System
System requirements
Operating systems:
Development status: Prototype being applied
Architecture and major DSS components
[Describe the basic architecture of the system in software and hardware. Desktop client-server, web based, as well as the integration with available systems. Basic data flow, focusing on retrieval of required input and propagation and implementations of decisions. Mention its modular and scalability capabilities.]
Usage
[Describe the level of use: Research level use, Industry use, Government use.]
Computational limitations
[Describe the system limitations: e.g. number of management units, number of vehicles, time horizon.]
User interface
User interface quality:
Complexity of system / user interface: Using this program requires a substantial investment in learning the details of the software.
Documentation and support
Support: A bulletin board for LANDIS users is available at: http://ash.forest.wisc.edu/cgi-bin/users/YaBB.pl
Installation
Prerequisite knowledge needed: This software is not designed for mass consumption. Successful application is probably best accomplished through a team that includes individuals with working knowledge of UNIX systems, C and C++ language, GIS packages, forest vegetation dynamics, associated resource interactions, and forest planning. [Mowrer]
Cost: Not priced
Demo:
References
Cited references
- ↑ http://nrs.fs.fed.us/tools/landis/
- ↑ http://fp0804.emu.ee/wiki/index.php/Simon%27s_decision_making_model
- ↑ http://nrs.fs.fed.us/tools/landis/
- ↑ http://web.missouri.edu/~umcsnrlandis/
External resources
Website: http://www.landis-ii.org/
Publications: http://www.landis-ii.org/documentation/PublicationsPage
