objectsbuildings

Objectsbuildings is a term used in 3D city modeling and geographic information systems to describe a structured representation that combines building volumes with other urban objects as discrete, manipulable entities within a digital scene. The term is not an official standard, but it appears in software pipelines and datasets that treat buildings and related objects—such as roads, trees, street furniture, and façades—as interoperable objects for analysis and visualization.

In practice, objectsbuildings data may be organized as a hierarchy of object classes with attributes for geometry (footprint and height), location (coordinates), appearance (materials, textures), and semantics (building use, year of construction). Common city modeling formats support this approach, notably CityGML and CityJSON, which define levels of detail (LOD 0–4) and semantic surfaces. The object-based approach enables explicit relationships among elements, such as adjacency, containment, and containment with infrastructure networks.

Workflows to create and maintain objectsbuildings datasets include data capture from surveys, photogrammetry, and LiDAR, followed by digitization and semantic labeling. Integration with Building Information Modeling (BIM) allows lifecycle data to be linked to urban objects, and data can be exported for use in GIS, urban planning, or simulation environments.

Applications encompass urban planning, disaster risk assessment, energy and environmental simulations, and high-quality visualization. Challenges involve maintaining semantic consistency across diverse object types, handling large data volumes, addressing occlusion and Level of Detail, and ensuring interoperability across software platforms. Overall, objectsbuildings supports modular, object-based representations that enhance querying, editing, and scenario testing in urban environments.