The Polar Chart Widget visualizes data in a radial coordinate system, ideal for directional data analysis such as wind rose diagrams. Data points are plotted on a circular grid defined by a theta (angular) axis and a radial axis.
In this example, Active Power values are binned into 12 angular sectors (30° each), creating a classic wind rose pattern. The radial axis shows power magnitude in kW, while labels around the perimeter show aggregate values per direction.
Key Features
Chart Types
Three rendering modes are available:
- Vertical bar (Column) — Bars radiating outward from center, ideal for wind roses.
- Line — Connected points forming a polar line chart.
- Area — Filled area chart for showing distribution density.
Directional Binning
Data can be aggregated into configurable angular bins. The bin count determines how many sectors the 360° circle is divided into (e.g., 12 bins = 30° sectors). Binning uses a configurable Grouping method to aggregate values within each sector.
Polar Geometry Control
- Start / End angle — Define a partial arc (e.g., 0°–180° for a half-rose).
- Grid interpolation — Choose between Circle (smooth curves) or Polygon (angular grid lines).
- Radius axis — Set min/max values or leave blank for automatic scaling.
Data Sources
- Point — Standard metric values mapped to theta and radial axes.
- Availability Statistics — Availability-related metrics for directional analysis.
Configuration
To configure the Polar Chart, see the Polar Chart configuration guide.