Overview
A Semi Gauge Chart displays a single aggregated Measure value as a half-circle arc with the value rendered as text at the arc’s base. The arc spans 180° from left to right and renders as a uniformly colored band. Semi Gauge is one of the four Gauge variants in the chart family. Semi Gauge fits Dashboards where the half-circle layout suits the composition and the displayed value is bounded by a meaningful range.
Semi Gauge Charts are authored from Lens → Design → Chart Designer → Visualization → Semi Gauge Chart. The Properties panel exposes Gauge configuration plus Adhoc Report. The Columns tab exposes a focused set of per-column settings — Display Name, Data Format, and Drilldown for Measures; Groups plus those three for Dimensions.
When to use it
- Performance against a goal — show how close an aggregated Measure is to a target.
- Capacity utilization — show usage against total capacity with the half-circle visual emphasis.
- Score against thresholds — bucket a Measure into pass/warning/fail bands with configured color ranges (if available).
- Dashboard KPIs where the value’s position within a range matters more than the value alone — pick Semi Gauge over Numbered Card when the analytical story is “how far along are we” rather than just “what’s the value.”
- Compact half-circle layouts where Radial Gauge’s full circle is too prominent and Linear Gauge’s bar doesn’t fit the composition.
Properties tab — Gauge
The Gauge group is the Semi Gauge’s central configuration.
| Percentage (toggle) | When on, displays the Measure as a percentage. When off, the raw aggregated value displays. |
| Font Color | Color of the value text displayed below the arc. |
| Minimum | Lower endpoint of the gauge arc’s range. |
| Maximum | Upper endpoint of the gauge arc’s range. |
| Color ranges | Configurable color bands segmenting the arc, each with a color and a value span. |
| Adhoc Report | Identical to Bar Chart’s Adhoc Report group. |
Columns tab
The Columns tab exposes per-column settings.
Measure column settings
| Display Name | Label used when the column appears in the chart (e.g., shown below the arc as the Measure’s name). Defaults to the source column name. |
| Data Format | Number formatting applied to the displayed value — currency, decimal places, thousands separator, percentage, custom format. |
| Drilldown | Configuration that lets a viewer click the chart to open a different chart or report as a drilldown scoped to the clicked value’s context. |
Dimension column settings
| Groups | Categorical grouping of Dimension values into named buckets. Dimension-specific; not exposed on Measure columns. |
| Drilldown | Drilldown configuration for the Dimension. [SME verify: as for Measure Drilldown, applicability on the single-value Semi Gauge display] |
Key behaviors
Half-circle arc spans 180°. The Semi Gauge renders as a half-circle from left to right, with the arc as a uniformly colored band by default. The aggregated Measure value displays as text below the arc center, along with the Measure column name.
Value below the arc, not on it. Unlike a traditional dial gauge where a needle points at a position along the arc, Semi Gauge displays the Measure value as text below the arc. The arc is the visual frame; the value is the content. This makes Semi Gauge function more like a styled Numbered Card with an arc surround than a position-indicator gauge.
Range endpoints define the Percentage scale, not the arc shape. The Minimum and Maximum values anchor the Percentage toggle’s computation — when on, the toggle displays the Measure as a percentage of where it sits between Min and Max. The Min and Max do not visually segment the arc by default; their effect is in the value display, not the arc rendering.
Color ranges segment the arc when configured. Color range configuration divides the arc into bands of different colors corresponding to value ranges, typically for severity zones.
Single-Measure design. Semi Gauge displays one Measure.
Choosing among the four Gauge variants. Semi Gauge for compact half-circle KPIs. Radial Gauge for full-circle emphasis. Linear Gauge for straight-bar layouts (vertical by default, horizontal via toggle). Full Gauge when the richest configuration (Gauge Type, label styling, custom colors, multiple range types) is needed. All four serve the same analytical purpose; pick by Dashboard composition and configuration depth needed.