The Attribute Table function allows you to specify an attribute table that is used to symbolize a single-band raster layer. Use this function to present imagery that has undergone classification into categories, such as land cover, land use, risk factors, or temperature ranges.
Notes
Keep the following in mind when using the Attribute Table function:
- This function supports only 8-bit raster inputs.
- You can assign an existing attribute table with a defined color scheme, or you can create a new color attribute table.
- If the table contains Red, Green, and Blue fields, values in those fields will be used similar to a color map when rendering the image.
- The attribute table is referenced when using this function even when it is not stored in the dataset, such as with raster datasets that contain internal attribute tables.
- When the dataset is displayed, it can be symbolized based on the table values. When a pixel is queried, the table values will be returned.
Parameters
The parameters for the Attribute Table function are described below.
| Parameter | Description |
|---|---|
Raster | The input raster. |
Table Type | The input attribute table can be entered using the Manual option in which you assign a class name and a color to each value, or choose the External option to reference an existing table from one of the following:
|
Add an attribute table manually
To manually add an attribute table, complete the following steps:
- For the Table Type parameter, choose Manual.
- Click the Generate Table drop-down.
- Set the values for Minimum Value and Maximum Value.
The current range of values to choose from is between -127 and 127.
- Optionally, provide a base name for the classes associated with each unique value, and set the color scheme and the transparency.
- When you're finished, click Run.
- To further refine colors, click the item in the color column and choose a color.