API Reference › core-common› Symbology › Contour

Contour Class

Describes how to generate and style contour lines for geometry within a single ContourGroup. Contours provide a way to visualize elevation within a 3d scene by drawing lines at fixed intervals along the z-axis. There are actually 2 kinds of contour lines: major and minor. Each kind can be styled independently. A contour line is generated every minorInterval meters. Every nth line will be a major contour, where n = majorIntervalCount; the intervening lines will all be minor contours. For example, with a majorIntervalCount of 1, every contour will be major; of 2, every other contour will be major; and of 3, there will be two minor contours in between each major contour.

Methods

Name Description
clone(changedProps?: Partial<ContourProperties>): Contour Create a copy of this Contour, identical except for any properties specified by changedProps.  
compare(other: Contour): number Performs ordered comparison between this and another contour.  
equals(other: Contour): boolean Returns true if this is logically equivalent to other.  
toJSON(): ContourProps    
compare(lhs: Contour, rhs: Contour): number Static Performs ordered comparison of two contours.  
create(props?: Partial<ContourProperties>): Contour Static Create a new Contour.  
fromJSON(props?: ContourProps): Contour Static    

Properties

Name Type Description
defaults Static Readonly Contour    
majorIntervalCount Readonly number The count of minor contour intervals that define a major interval (integer > 0).  
majorStyle Readonly ContourStyle Settings that describe how a major contour is styled.  
minorInterval Readonly number The interval for the minor contour occurrence in meters; these can be specified as fractional.  
minorStyle Readonly ContourStyle Settings that describe how a minor contour is styled.  
showGeometry Readonly boolean If true, show underlying geometry along with the associated contours.  

Defined in

Last Updated: 24 October, 2025