Define Thematic Style
While creating or modifying a named layer using a vector named table, Spectrum Spatial Manager
allows you to apply themes on the layer. This feature helps in customizing layers used
in maps for specific usages. Spectrum Spatial Manager supports the creation of layers with two
types of themes: Individual and Range. The style options will be available based on the
geometry of the selected named table.
Note: The feature of Define Thematic Style appears
only when you have selected a vector table to create the layer.
Range Theme
- Theme Type and Columns
-
- Thematic Type: It allows you to select a
theme type. The available themes are Individual and Range:
- Individual: Select a column from the table to apply the theme and click Apply Changes.
- Range: Select a column from the table then choose the thematic style settings.
- Column: It allows you to select a column from the named table you selected.
- Thematic Type: It allows you to select a
theme type. The available themes are Individual and Range:
- Thematic Settings
- Note: These settings apply only when the Thematic Type is Range.Method: Choose an option from the Method drop-down to select how the ranges are created. You can choose from five different methods:
- Equal Count: Each range contains approximately the same number of records. If the number of records is not evenly divisible by the number of ranges, Spectrum Spatial Manager places the remaining records into the most appropriate ranges.
- Equal Ranges: The difference between the top and bottom values in each range is the same.
- Natural Break: The range breaks are determined according to an algorithm such that the difference between the data values and the average of the data values is minimized on a per range basis. This reduces error and enables you to obtain a truer representation of your data.
- Standard Deviation: The middle range breaks at the mean of your data values, and the ranges above and below the middle range are one standard deviation above or below the mean.
- Quantile: Determines the distribution of a variable across a segment of your data (for example, population). When you choose Quantile, a Quantiling box appears at the bottom of the dialog box. Choose the field or an expression you want to perform the quantiling operation on from the drop-down list.
- Customizing Legend
- Legend order: It determines the order in which range and value
labels (for ranged and individual values maps) and field labels (for all
other thematic maps) appear in the legend.
- Ascending: The ranges are displayed from the lowest to highest value.
- Descending: The ranges are displayed from the highest to lowest value.
- Cancel
- Click to cancel the operation and returns you to the map.
- Create
- Click to create a thematic map based on either the default or customized settings.
Individual Theme
- Theme Type and Columns
-
- Thematic Type: It allows you to select a
theme type. The available themes are Individual and Range:
- Individual: Select a column from the table to apply the theme and click Apply Changes.
- Range: Select a column from the table then choose the thematic style settings.
- Column: It allows you to select a column from the named table you selected.
- Thematic Type: It allows you to select a
theme type. The available themes are Individual and Range:
- Thematic Settings
- Note: These settings apply only when the Thematic Type is Individual.Vary Color: Select this option to modify the colors for a selected style.
- Color Palette: Click to select a color palette.
- Style: This option is available if the geometry type in the selected table is a line or point. Click and select from the style picker control.
- Line Width: It specifies an integer value specifying the width (thickness) of the line. This option appears for a table if the geometry type is Line. Select the unit of line width as Pixel or Point.
- Show Border: Select to display the border of the layer. The Show Border appears for a table if the geometry type is Polygon.
- Customizing Legend
- Legend order: It determines the order in which range and value
labels (for ranged and individual values maps) and field labels (for all
other thematic maps) appear in the legend.
- Ascending: The ranges are displayed from the lowest to highest value.
- Descending: The ranges are displayed from the highest to lowest value.
- Cancel
- Click to cancel the operation and returns you to the map.
- Create
- Click to create a thematic map based on either the default or customized settings.