The Discrete Color renderer is used to display the values in the raster dataset using a random color. It can only be used with integer raster datasets, and a legend is not generated.
This renderer is similar to the Unique Values renderer, but it is more efficient when there are a large number of unique values as it does not have to calculate how many unique values exist. The Discrete Color renderer will assign a color to each unique value until it reaches the maximum number of colors that you chose. The next unique value will start at the beginning of the color scheme; this process will continue until each unique value has a color assigned to it.
A legend displaying which color is mapped to which value is not generated or displayed in the table of contents.
- Right-click the raster layer in the table of contents and click Properties.
- Click the Symbology tab.
- Click Discrete Color.
- Click the Color scheme drop-down arrow and click a color scheme.
Right-click the color scheme to
- Toggle between a graphic view and text view.
- Open the Properties to modify specifics about how the color ramp is generated.
- Save the color ramp.
- Type a value in the Number of colors text box.
The number of discrete colors must be an integer. The discrete color renderer will assign a color to each unique value until it reaches the maximum number of colors that you chose. Then the next unique value will start at the beginning of the color ramp; this process will continue until each unique value has a color assigned to it.
- Optionally, click the Display NoData as button to symbolize the NoData using a color.
- Click OK.