API Reference > imodeljs-common > Geometry > ElementIdsAndRangesProps ElementIdsAndRangesProps Interface Compact wire format representing geometric changes to a set of elements as part of a ModelGeometryChangesProps. All of the elements belong to the same model. The number of ElementIdsAndRangesProps.ids and ElementIdsAndRangesProps.ranges are guaranteed to be the same. see ElementGeometryChange for a more useful representation of an individual element change. see ModelGeometryChanges.iterable to iterate over ElementGeometryChanges. Properties Name Type Description ids Readonly string The Ids of the elements, compressed and sorted in ascending order. ranges Readonly Range3dProps[] The range of each element, indexed by the position of the corresponding element's Id in ElementIdsAndRangesProps.ids. Defined in core/common/src/ModelGeometryChanges.ts Line 19 Last Updated: 11 June, 2024