This is appropriate for qualitative data such as land cover. Unique Values is similar, except the colors are not continuous. For example, 8-bit data is stretched from 0 to 255. Stretch is the classic color scheme option it takes the range of all the values in the data and stretches it to fit within a data type range. The RGB, Unique Values, Stretch, Colormap, Classify, Shaded Relief, and Discrete options accomplish similar adjustments but in different ways. There are minor, yet distinct, differences between the options for symbolizing imagery. You can also select other layers from the Contents pane and, without closing the Symbology pane, apply the same symbology to them. In the Symbology pane, you can fine-tune the parameters specific to the symbology type you selected. Click the lower half of the Symbology button to access additional symbology options.Set the symbology parameters for the layer.To change the appearance of an image layer, complete the following steps: This also works with a dataset that has vector (V) and unit vector (U) components. The Vector Field option allows you to display ocean and wind currents as arrows indicating magnitude and direction.

You can use the Classify and Discrete options to group continuous data into a limited number of groups. This is referred to as applying a stretch to a dataset. You can also display the values along a color scheme to show the areas that are brighter than others. For example, you can display multispectral imagery using a three-band color composite-also known as an RGB composite-in which you use the bands available to highlight features of interest. Only symbology types that are valid for the data you've selected are presented. Modify the appearance of an image layerĭepending on the type of imagery you're working with, there are a number of options for displaying and symbolizing it.

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