For example, if a layer contains income data, you can adjust the transparency of each location proportional to its income. You can use a custom attribute expression written in Arcade instead of an attribute field. You can also use existing expressions to build new expressions however, some variables may not work in all profiles-for example, an expression created for pop-ups may not work for styles.Ĭlick Use expression and use the editor window to create the expression. Adjust the position of the slider handles to change how the transparency gradient is applied.Optionally, select an attribute from the Divided by drop-down menu to use to standardize or normalize the data, such as dividing population by area or costs by total population.To use an existing expression, select it from the Existing tab in the editor window. Alternatively, click the numeric values next to the slider handles and type precise values. To see details in the histogram more closely, click Magnify slider. For Transparency range, adjust the percent of transparency for the high and low ends of the ramp.To go back to the original slider positions at any time, click Reset slider positions. Optionally, turn off the Include in legend toggle button to hide the transparency ramp in the legend.Note that 0 percent transparency is a solid color (fully opaque). Multiscale maps allow you to view geographic data across a range of scales-also known as zoom levels-from buildings to the entire globe. Specifying the zoom level at which content is drawn is known as setting the visible range. Because most data does not need to be shown across all zoom levels, it is a good practice to confirm, and if necessary, change the visible range. Your map may contain many layers, each with its own visible range.
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