Style Explorer

The Style Explorer component  is used to access and manipulate the style associated with the layer. For every layer with geometric  (point, line and polygon) or raster representation, there is always an associated default style.

It is accessible through:

    Layer Explorer >  Right Click over a Layer-name Style Explorer

    View > Style Explorer

The explorer style has three distinct components:

  1. Style Explorer: Uses a tree structure (style, rule and symbolizer) to represent the hierarchy of the style associated with the layer. The tree structure is shown bellow with examples of styles for polygon, line and point:


  1. Tool Bar: It provides tools to manipulate the symbols:

  1. Symbology: This component allows the user to modify the symbol,  accessing all properties belonging to the selected symbols. The details may vary depending on the feature being represented. The feature types and their properties are listed bellow and the links leads to the Symbolizers session:


A Symbolizer is an abstract type for encoding the graphical properties used to portray geographic information.  A Symbolizer describes how a feature will appear on the map. The Symbolizer describes not just the shape that should appear but also such graphical properties as color and opacity. A Symbolizer is obtained by specifying one of a small number of different types of Symbolizers and then supplying parameters to override its default behavior.

Basic Symbology

Basic Fill

A Fill specifies the pattern for filling an area geometry.


Basic Stroke

A Stroke specifies the appearance of a linear geometry.



Graphic Symbology

A Graphic is a graphic symbol with an inherent shape, color(s), and possibly size. A graphic can be defined very informally as "a little picture" and can be either a raster or vector-graphic source type.


Graphic Properties

The basic parameters of a graphic symbology are:

Well Known Mark

A WellKnown Mark are geometric shapes used to represent a feature in a map. Available shapes include at least  circle, square, cross, triangle, star and x, although map servers may draw a different symbol instead if they don't have a shape for all of these.

The basic parameters of a Well Known Mark are:


Glyph Mark

The alternative to the Well Known Marks is an external mark format. The Glyph Mark allows to use a  TrueType font file and select an individual glyph from that file.

The basic parameters of a Glyph Mark are:


Local Image

Another type of mark that can be defined is the image files (png files). To define it click on the value

The only parameters for a Local Image is:


Raster Symbology (Style/Contrast)

A Raster Symbology is used to specify the rendering of raster/matrix-coverage data (e.g., satellite images, DEMs). It is also possible to define a Contrast. Everything is saved into the current TerraView Project, however it does not change the original raster.

The basic parameters of the Style in a Raster Symbology  are:


Text Symbology

To add a Text Symbology as part of the style, click on and  specify the attribute to be used. The basic parameters of a Text Symbology  can be changed:


In this example three vector data were used and its three respective styles(rules) where defined by the Style Explorer: