Add a bubble layer

Artikkeli
11/26/2024

The Bubble layer renders location data as scaled circles on the map.

A map displaying point data using the bubble layer

Initially all bubbles have the same fill color. If a field is passed into the Legend bucket of the Fields pane, the bubbles are colored based on their categorization. The outline of the bubbles is white be default but can be changed to a new color or by enabling the high-contrast outline option. The High-contrast outline option dynamically assigns an outline color that is a high-contrast variant of the fill color. This helps to ensure the bubbles are clearly visible regardless of the style of the map. The following are the primary settings in the Format pane that are available in the Bubble layer section.

Setting	Description
Size	The size of each bubble. This option is hidden when a field is passed into the Size bucket of the Fields pane. More options appear as outlined in the Bubble size scaling section further down in this article.
Range scaling	Used to define how the bubble layer scales the bubbles. • Magnitude: Bubble size scales by magnitude. Negative values are automatically converted to positive values. • DataRange: Bubble size scales from min-of-data to max-of-data. There's no anchoring to zero. • Automatic: Bubble size scales automatically into one of the two types, as follows: • Magnitude: Positive or negative only data. • DataRange: data that contains both positive and negative values. • (Deprecated): Applies to reports created prior to the range scaling property, to provide backward-compatibility. It's recommended that you change this to use any one of the three preceding options.
Shape	Transparency. The fill transparency of each bubble.
Color	Fill color of each bubble. This option is hidden when a field is passed into the Legend bucket of the Fields pane and a separate Data colors section appears in the Format pane.
Border	Settings for the border include color, width, transparency and blur. • Color specifies the color that outlines the bubble. This option is hidden when the High-contrast outline option is enabled. • Width specifies the width of the outline in pixels. • Transparency specifies the transparency of each bubble. • Blur specifies the amount of blur applied to the outline of the bubble. A value of one blurs the bubbles such that only the center point has no transparency. A value of 0 apply any blur effect.
Zoom	Settings for the zoom property include scale, maximum and minimum. • Maximum zoom level tiles are available. • Minimum zoom level tiles are available.
Options	Settings for the options property include pitch alignment and layer position. • Pitch alignment specifies how the bubbles look when the map is pitched. • layer position specifies the position of the layer relative to other map layers.

Bubble size scaling

If a field is passed into the Size bucket of the Fields pane, the bubbles are scaled relatively to the measure value of each data point. The Size option in the Bubble layer section of the Format pane disappears when a field is passed into the Size bucket, as the bubbles have their radius scaled between a min and max value. The following options appear in the Bubble layer section of the Format pane when a Size bucket has a field specified.

Setting	Description
Min size	Minimum bubble size when scaling the data.
Max size	Maximum bubble size when scaling the data.

Category labels

When the bubble layer displays on a map, the Category labels settings become active in the Format visual pane.

The Category labels settings enable you to customize font setting such as font type, size and color as well as the category labels background color and transparency.