Measure Tool

The Measure Tool lets you measure geodetic distances along a multi-segment line and compute the surface area of a polygon, directly on the Cesium globe.

Opening the tool

Click the ruler icon in the toolbar (between the Histogram and Checkpoint buttons) to open the Measure Tool panel.

Modes

Mode	What it measures
Length	Geodetic distance along a polyline, with per-segment breakdown
Area	Surface area of a closed polygon

Click Length or Area at the top of the panel to switch modes before or during drawing.

Drawing

Action	Effect
Left-click	Add a vertex
Double-click	Finish the shape
Right-click	Undo the last vertex
Click after finishing	Start a new measurement

A dashed yellow line (Length mode) or filled yellow polygon (Area mode) follows your cursor as you draw, giving a live rubber-band preview. Yellow dots mark each committed vertex.

Results

Length mode

Once two or more points are placed the panel shows:

• Segment breakdown — each segment's geodetic distance (e.g. Seg 1: 234.5 m, Seg 2: 1.234 km). The list appears as soon as there are at least two segments.
• Total length — sum of all segments, updated live as you move the cursor.

Distances are displayed in m below 1 km, km above.

Area mode

Once three or more points are placed the panel shows:

• Total length — perimeter of the polygon.
• Area — surface area of the closed polygon.

Areas are displayed in m² below 10 000 m², ha up to 1 km², km² above.

Controls

Button	Action
Length	Switch to line-distance mode
Area	Switch to polygon-area mode
Clear	Remove all vertices and results, restart the tool

The Clear button is enabled only after a measurement has been finished (double-click).

Collapsing the panel

Click the Measure Tool section title to collapse or expand the panel while keeping the tool active. The open/closed state is saved across sessions.

Closing the tool

Click the toolbar ruler icon again to close the panel and remove all drawn entities from the map.