WxGUI Graphical Modeler

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Graphical Modeler is a GUI application which allows to create and manage complex models using easy-to-use interface. When performing analytical operations in GRASS, the operations are not isolated, but part of a chain of operations. Using Graphical Modeler, that chain of processes (ie. GRASS modules) can be wrapped into one process (ie. model). So it's easier to execute the model later with slightly different inputs or parameters.

Graphical Modeler is release under GNU GPL licence and the source is available from GRASS SVN repository.

See also manual page and wiki page for development issues.

The Graphical Modeler is available in GRASS 6.4.2+ from the Layer Manager menu File → Graphical modeler or from the toolbar .

In GRASS 7 the tool is also available from the command line as stand-alone application (g.gui.gmodeler).

Core features

The modeler currently allows to:

define actions (GRASS commands)
define data items (raster, vector, 3D raster)
define relations between data and action items
define loops (series), conditions

validate model
run model
store model settings to the file (GRASS Model File|*.gxm)
export model settings to Python script
export model to image

Gallery

Experimental prototype of Graphical Modeler
Experimental prototype of Graphical Modeler
Experimental prototype of Graphical Modeler
Experimental prototype of Graphical Modeler
Graphical Modeler: run parametrized model
Graphical Modeler: define model variables
Graphical Modeler: define loops in the model
Graphical Modeler: define if/else statements in the model
Graphical Modeler: define if/else statements in the model - show properties
Graphical Modeler: Python editor

Video tutorials

Creating simple model

Define intermediate data

Model parametrization

Define variables

Start model with data item

Creating simple model in wxGUI Graphical Modeler

Start model with data, define relation manually

Creating model with series (loop) - static list of maps

Creating model with series (loop) - dynamic list of maps

Creating model which exports all GRASS vector maps from given mapset to PostGIS database

Creating model which exports all GRASS vector maps from given mapset to PostGIS database (including schema)

1) create schema with name of input mapset

2) copy vector maps from selected mapset to the current and stores their attributes in SQLite database

3) exports GRASS vector maps to the selected PostGIS database

WxGUI modeler - example of post-classification smoothing (remote sensing)

Python editor in wxGUI Graphical Modeler

Vector overlay, area calculation

Unsupervised classification performed using wxGUI Modeler

External links

Graphical modeller in action:

Brief description GRASS Graphical Modeler (in Russian)

Other products:

Acknowledgement

wxGUI Graphical Modeler was developed by Martin Landa with institutional support of the Czech Technical University in Prague

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