The Attribute Table function allows you to define an attribute table to symbolize a single-band mosaic dataset or raster dataset. This is useful when you want to present imagery that has undergone a classification to land use, such as forest land, wetlands, crop land, and urban. Additionally, if your table contains fields named red, green, and blue, values within those fields will be used like a color map when rendering the image.
The attribute table is referenced when using this function, even when it is not stored within the dataset—as with raster datasets that can contain internal attribute tables.
The inputs for this function are the following:
- Input Raster
- Table Type—The table can be entered using the Manual type where you assign a class name and a color to each value, or an external file, which comes from one of the following:
- A .dbf file
- A raster dataset that has an attribute table
- The table used in the Attribute Table function of another mosaic dataset
When the dataset is displayed, it can be symbolized based on the table values, and when the pixel is queried, the table values will be returned.
Add an attribute table manually
- Choose the Manual table type option.
- Click the Generate button.
- Click the Minimum Value and Maximum Value drop-down menus to set your values. The current range of values to choose from is between -127 and 127. You can specify a base name for the classes associated with each unique value, your color scheme, and the transparency. When finished, click OK.
- If you need to further refine colors, click the item in the color column and choose the desired color.