aRTtheme {aRT} | R Documentation

## Class aRTtheme

### Description

Class that enables database queries with temporal and (or) attribute restrictions. It can select the objects from the ids resulting from a spatial query.

Themes in TerraLib can have visual aspects, as colors and lines styles. These configurations are not used when an `aRTtheme` object is created, besause it can be used only for data processing. But there are functions to do so, for example `setVisual` and `setVisible`.

### Objects from the Class

Objects can be created by calling `createTheme` or `openTheme`, from `aRTlayer`. `openTheme` is a function of class `aRTdb` too.

### Extends

Class `aRTcomponent`, directly.

### Methods

getBox
  Returns the bounding box.
getData
  Returns all attributes and geometry of the theme.
getVisual
  Returns the visual configuration of the theme.
openQuerier:
  Opens a query over the theme.
setVisible
  Changes the visibility of the theme (visible or not).
setVisual
  Sets the visual of the theme.

### Author(s)

Marcos Aurelio Carrero, Pedro Ribeiro de Andrade

### See Also

See `aRTtheme-METHOD` for a method of this class or `CLASSNAME-class` for links to other classes.

[Package aRT version 1.7-1 Index]