Map

Thematic Mapping (Themes)

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The strength of communicating information lies in the method used to represent it. Maps prove to be a valuable method of representing a relationship between observable occurrences found within a geographic area. Maps that display the spatial distribution of an attribute are known as thematic maps. CartoVista provides a variety of thematic mapping techniques to display your strategic data in innovative and meaningful ways. When you publish and select indicators in the background or foreground themes, CartoVista automatically selects the type of thematic map you can display based on the data type chosen. The following paragraphs introduce the type of thematic maps supported by CartoVista.

Once the theme is displayed, the thematic settings dialog is accessible to customize the settings and change the colors.

Range of Values Themes

In CartoVista, this type of thematic map is typically used as a background theme on layers containing region objects. If you have numerical data that links to geographic regions, this type of thematic map, also known as a choropleth map will help you understand and compare your values by displaying color ranges. When you select an indicator from the background theme tab, CartoVista reads your data values and calculates

appropriate ranges automatically. CartoVista uses the quantile classification method to create the range thresholds.

Range of Values Themes

 

Individual Values Themes

If your data contains discrete values such as a classification or category, you can use an individual values theme to represent each value with a color. Individual values theme are usually constructed from indicator data stored as strings (characters).

For example, this type of theme is very useful to show a land use classification by color for different regions (commercial, residential).

Once the theme is displayed, the thematic settings dialog is accessible to customize the settings and change the color for each individual value in the theme.

 

Individual Values Themes

Symbolic Themes

In CartoVista, symbolic themes are available in the foreground theme tab. Symbolic themes can use a combination of graduated symbols, symbol type (shape) and color to represent indicator values on your map.

In CartoVista, this multiple thematic representation is called a multi-variate symbolic theme.  Symbolic themes can be applied to all layer types, whether they contain region, polyline or point objects. When working with regions or lines, the actual symbol point is

displayed at the centroid of each object.

 

 

Symbolic Themes

 

Pie Chart Themes

In statistical analysis, pie charts are useful to compare values for different categories of information.

The area of each sector in a pie chart indicates the category's relative importance in relation to others.

For example, in the context of an election, you may create a pie chart map that outlines each political party with a specific color to compare the number of votes and understand its geographic distribution.

 

Pie Charts Themes

 

 

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CartoVista Publisher Help - Version 2.0 , September 30, 2010 . © Copyright 2010, DBx GEOMATICS inc.