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geopro:pedro:netlogo

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geopro:pedro:netlogo [2007/07/06 23:21] – pedrogeopro:pedro:netlogo [2011/08/18 20:25] (atual) – pedro
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   * BehaviorSpace tool used to collect data from multiple runs of a model   * BehaviorSpace tool used to collect data from multiple runs of a model
  
-=====Models===== 
  
 +===== GIS =====
  
 +http://ccl.northwestern.edu/netlogo/docs/gis.html
  
 +load vector GIS data (points, lines, and polygons), and raster GIS data (grids) into NetLogo. The extension supports vector data in the form of ESRI shapefiles. The shapefile (.shp) format is the most common format for storing and exchanging vector GIS data. The extension supports raster data in the form of ESRI ascii Grid files. The ascii grid file (.asc or .grd) is not as common as the shapefile, but is supported as an interchange format by most GIS platforms. 
  
  
 +=====Models=====
  
 ====Wolf Sheep Model==== ====Wolf Sheep Model====
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 work, and perhaps it would be necessary to have a third agent, a "controller". work, and perhaps it would be necessary to have a third agent, a "controller".
  
 +
 +
 +====Car Cruising model: A GIS Example====
 +
 +{{  http://leg.ufpr.br/~pedro/figures/netlogo-gis-cars.jpg?400}}
 +\\
 +
 +Presented [[http://gisagents.blogspot.com/2006/02/car-cruising-model-gis-example.html|here]].
 +
 +A good example of where GIS can be introduced into a model, is for dynamic car cruising within the Santa Fe downtown area.
 +
 +The background map of the model is the result of converting GIS data into an image, initially a jpeg file. It was then converted into a text format image file: PPM (portable pix map) consisting of three RGB values for each pixel. These were converted into NetLogo color values using the import-ppm procedure. The data was cleaned up a bit within Netlogo itself with the cleanup-map procedure, then written to an external data file via the export-dat procedure. Finally, for this version of the model, the data written out in the preceeding step was cut & paste into the model as an array of integer values.
 +
 +The model itself simply manages automobiles driving on the map staying on the "streets" by using the patch colors as guide. The cars randomly choose side streets as they see them, choosing to turn roughly 1/3 of the time in the move-forward procedure.  
 +
 +__TerraME__: It could import raster data as well as vectorial data to cellular spaces, to support this kind of application.
  
 ===== Papers ===== ===== Papers =====
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 |U. Wilensky, 2001| Proceedings of EuroLogo|[[http://leg.ufpr.br/~pedro/papers/netlogo_emergent_patterns.pdf|pdf]]| [[http://scholar.google.com.br/scholar?hl=pt-BR&lr=&cites=3702359739057909901| 23 citations in Scholar]]| |U. Wilensky, 2001| Proceedings of EuroLogo|[[http://leg.ufpr.br/~pedro/papers/netlogo_emergent_patterns.pdf|pdf]]| [[http://scholar.google.com.br/scholar?hl=pt-BR&lr=&cites=3702359739057909901| 23 citations in Scholar]]|
  
-{{  http://leg.ufpr.br/~pedro/figures/netlogo-gas.jpg}}+{{http://leg.ufpr.br/~pedro/figures/netlogo-gas.jpg  }}
 \\ \\
  
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 The paper describes two models. The first is the model of predator/pray using wolf/sheep/grass agents The paper describes two models. The first is the model of predator/pray using wolf/sheep/grass agents
-(the same example used in a paper that describes [[geopro:pedro:repast|repast]]). +(the one cited above, and the same example used in a paper that describes [[geopro:pedro:repast|repast]]).
 The second model studies the trajectory of gas particles in a box, as shown in the figure. The second model studies the trajectory of gas particles in a box, as shown in the figure.
 //The yellow zig-zag line traces the movement of a single particle.// //The yellow zig-zag line traces the movement of a single particle.//
 +
  
  
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 //Finished models can be published on the web as Java applets.// //Finished models can be published on the web as Java applets.//
  
-//NetLogo includes a still evolving tool called BehaviorSpace that allows “parameter sweeping,” that is, systematically testing the behavior of a model across +//NetLogo includes a still evolving tool called BehaviorSpace that allows “parameter sweeping,” that is, systematically testing the behavior of a model across a range of parameter settings.//
-a range of parameter settings.//+
  
-The space is not fixed to a cellular space, one can use the turtles to represent nodes and edges in a network, +The space is not fixed to a grid, one can use the turtles to represent nodes and edges in a network, 
 as shown in the graph on the right. as shown in the graph on the right.
 +Networks can be read from external text files.
  
 //There are many language elements for talking about space and spatial relations: towards, distance, neighbors, forward and back, left and right, //There are many language elements for talking about space and spatial relations: towards, distance, neighbors, forward and back, left and right,
geopro/pedro/netlogo.1183764101.txt.gz · Última modificação: 2007/07/06 23:21 por pedro