A chart widget graphically displays the values of one or more attributes for a feature. A bar chart can represent either the attribute values of a single field, aggregated values for multiple fields, or the total counts of features. The values can be depicted in either a horizontal bar or a vertical column. You may want to set a limit on the maximum number of features to keep the chart readable.
When you chart one field using the option to display features as bars, each bar represents the field value of a feature in the data source. For example, you are monitoring a city's snow-clearing efforts after a winter storm. There is a supply of salt available in the city for aiding in snow removal, although the salt is distributed across multiple city maintenance yards. For this situation, you could create a bar chart widget to display the amount of salt remaining at each yard. Charting the values for the salt-remaining field allows you to monitor the supplies and plan accordingly if you see that the salt is running low at a given maintenance yard.
Feature actions add display and navigation functions to individual features in the widget. If the widget's data source is a layer in a map, you can zoom the map to the feature, flash it on the map, select it on the map, or have the map follow the feature as it moves automatically.
You can use a chart widget to display multiple attribute values for a set of features using the option to display attributes as bars. In this case, a bar represents an aggregation of the values in each chosen field. In the snow removal scenario, a city supervisor wants to see a cumulative status of all the snow removal supplies, including salt, liquid calcium, and cinders. Rather than creating a separate chart for each material, you can configure the chart to show each field's value across multiple features. This allows the supervisor to understand the relative value for all the available supplies.
When displaying attribute values as bars, a summary operation is performed on the field values. The aggregate can be any one of the following:
A chart widget can depict as bars the counts of features within a chosen field. You could use this when mapping snow removal materials for the city to depict the amount of each type across all maintenance yards. In an emergency management scenario, you could use a bar chart to show the counts of open incidents that require a response.