A Spline Area Chart is a type of area chart that uses a spline interpolation algorithm to create a smooth curve connecting data points, and then fills the area beneath the curve. It combines the features of a Spline Chart and an Area Chart to visualize data trends over time or across categories.

The Spline Area Chart example below is displaying opened incidents over the last 12 months.

Now, let's look at the Data and Chart options for this this Spline Area Chart. This chart is displaying incident data, therefore it is utilizing the incident table.

Conditions: Setting conditions allows you to query the table you are building the chart off of.

Calendar Type: The calendar input can be set to a Standard Calendar or Fiscal Year.

Trend Type: Trend Type refers to the general direction or pattern of change in a set of data points over a specific period of time.

Date Range: This input determines the range of time displayed on the line chart. The Date Range considers the dates associated with the field selected in the Date Field chart option.

Date Field: A 'Date' field is designed to store date and time values. The Spline Area Chart is displaying incidents open or created in the last 12 months, so the Date Field input is set to "Created - sys_created_on".

Aggregate Type: Refers to a data aggregation method or function used to combine or summarize data from multiple records. They allow users to perform calculations on sets of records to derive meaningful insights. Some common aggregate types include:

Now, let's look at Spline Area Chart style settings that have been changed from the default settings to give this chart more clarity. First, a custom title of "Opened Incidents - Last 12 Months" is set to provide quick insight into the data the Spline Area Chart is displaying.

Next, the Data Values toggle is engaged to display the number of opened incidents per month along the line of the Spline Area Chart.