In this section, we will have a brief overview of how to start working on your models. We will now add inputs and algorithms, and see how you can run your models.
In this first example, you will identify the portion of a forest within 100 meters from streams (riparian trees). To begin a model, you will need to define the inputs. The graphical modeler will accept the following:
- Boolean
- Extent
- File
- Number
- Raster layer
- String
- Table
- Table field
- Vector layer
To add an input, either double-click on the appropriate category from the Inputs tab or drag the input on to the modeler canvas. The Parameter Definition dialog will open. Give the parameter a name and fill out any other details, which change depending on the input that is chosen. When an input parameter is defined and added to the model, it is essentially a conceptual parameter. It will not actually be connected to a GIS data layer until you are ready to run the model.
For this example, we will...