The Arc Layer draws a 3D arc between a set of points. Arc layers don’t show routes between points, instead showing the distance between the two points. The tallest arc represents the greatest distance.

Arcs are useful for "detangling" origin-destination paths, often serving as a more clear alternative from the Line Layer for datasets with many paths.

Settings

The following section provides help for every setting in Arc Layer.

Basic

Contains basic settings required for Arc Layer configuration.

You can draw arcs in two ways -- creating an arc from a set of source and destination points, or from a set of points and their neighbors.

Setting	Description
Layer Type	Must be Point to display the arc layer.
Dataset	Required. The dataset to use for the arc layer.
Columns	Required. The columns to use for the arc layer.
Columns: Points	Provide a pair of source/target latitude and longitudes columns, or Hex/H3 ID columns.
Columns: Point and Neighbors	Provide a latitude and longitude column for a point, then a `geo` column containing one or more neighbors.

Color

Color settings for the arc.

Setting	Description
Color Based On	The field to base the arc color on.
Color Scale	The color scale and palette for the arc color.
Opacity	The opacity of the arc color. 100 = fully opaque, 0 = fully transparent.

Stroke

Color settings for the stroke, or arc width.

Setting	Description
Stroke Slider	The stroke width (or range of stroke width when a field is selected for "Stroke Based On").
Stroke Based On	The field to base the stroke width on.
Stroke Scale	The scaling of the stroke width. Choose from linear, sqrt, or log.

JSON Schema

For details on how to programmatically specify layer properties, refer to the Layer Configuration specification.