Styling your Thematic Map - spectrum_spatial_insights - 1 - 1.4

Spectrum Spatial Insights Guide

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Spectrum > Spatial > Spectrum Spatial Insights
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Spectrum Spatial Insights
Spectrum Spatial Insights Guide
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How Do I
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You can specify the styles and class distribution for a Thematic Map.

To define the styling specifications for your thematic map:

  1. Click the Thematic type drop-down list to select the type of thematic that you want to create or modify. You have the following options:
    Option Description

    In a Grouped thematic, data is grouped into ranges.

    For example, all countries that had growth rates between zero and one percent are grouped into one range. Countries that had growth rates between one and 2.2 are grouped in a separate range.


    A Ranged thematic displays your data according to the ranges you set. Ranges are shaded with colors and/or patterns.

    They are used to show a relationship between the data values and geographical area (e.g., sales figures, household income) or to present ratio information such as population density (population divided by area).

    Dot Density

    Dot density maps use dots to represent the data value associated with a boundary or region. The total number of dots in a region represents that region's data value. If you have 10,000 senior citizens in a county, and each dot represents 100 senior citizens, there would be 100 dots in the county boundary.

    Dot density is particularly useful for showing raw data where one dot represents a large number of something such as population or number of fast-food restaurants in a region.

  2. Click the Select button to open the Select color scheme dialog.
    Choose colors to represent your numerical or ranged data. You can choose a theme that matches your data to a particular color scheme. For example, for data like income or population density, you can choose high to low theme that uses a light to dark color scheme.
    Option Description
    Sequential Sequential color schemes are used to highlight data such as temperature, income, or elevation rates. It ranges from a light color (representing low attribute values) to a dark color (representing high attribute values).
    Diverging A diverging color scheme puts equal emphasis on mid-range critical values and extremes at both ends of the data range. The colors increase in darkness to represent differences in both directions from this meaningful mid-range value in the data.
  3. Select a color break from the Color breaks drop-down list. These color breaks are based on Natural Breaks algorithm to divide the data. Choose Equal Count or Equal Ranges to customize the ranges, whichever gives you the best representation of your data.
  4. Use Number of breaks to specify the number of breaks. You can increase or decrease the break count by clicking the + or - buttons.
    Based on the number of breaks specified, a color legend displays the breaks in Ascending or Descending order. A thematic map is a type of map that portrays the geographic pattern of data in a geographic area.
  5. When you are done, click Save.