API Reference > geometry-core > Serialization > IModelJson > IModelJson.PlanarRegionProps IModelJson.PlanarRegionProps Interface Interface for a collection of curves that bound a planar region Properties Name Type Description loop undefined | [IModelJson.CurvePrimitiveProps] {loop:...} parityRegion undefined | [{ loop: [IModelJson.CurvePrimitiveProps] }] {parityRegion:...} unionRegion undefined | [IModelJson.PlanarRegionProps] {unionRegion:...} Defined in core/geometry/src/serialization/IModelJsonSchema.ts Line 130 Last Updated: 13 June, 2024