What IDS does for 3D as-built models
IDS means Information Delivery Specification. buildingSMART defines it as a standard for capturing information requirements in a computer-interpretable form so IFC models can be checked automatically.
For image-based as-built models, IDS is useful because photogrammetry produces geometry, point clouds, meshes, orthophotos, and measurement references, while BIM teams also need clarity on the elements and information delivered in IFC.
Why IDS matters for image-data deliverables
Many as-built deliveries fail because delivery expectations are vague. IDS turns “deliver a BIM model” into a checkable specification.
For Voxelia, IDS helps define what an image-based delivery should contain: measurable geometry, modelled BIM elements, filled properties, and documented areas that remain point cloud, orthophoto, or viewer references.
Requirements IDS can check
IDS is strongest for alphanumeric requirements and should be combined with separate geometry QA for scale, coordinates, visibility, and modelling boundaries.
| Check requirement | Why it matters | Delivery impact |
|---|---|---|
| IFC entity | Elements need the right IFC context. | Modelled roof, wall, or opening elements are handed over as proper IFC elements. |
| Property set | Planning teams need consistent fields. | Source, status, simplification, and review notes can be provided consistently. |
| Classification | Elements can be assigned to project or system classifications. | Required classifications become explicit delivery requirements. |
| Allowed values | Automated checks detect missing or inconsistent values. | Status values such as existing, assumed, simplified, or not visible stay consistent. |
Workflow from imagery to checked IFC
Define target model and limits
Clarify whether the output is IFC, CAD, orthophoto, viewer, or a combination.
Process imagery into reference geometry
Create point cloud, mesh, orthophoto, or roof/facade references from supplied photos.
Align EIR, LOIN, and IDS
Reduce requirements to what can be reliably delivered from the dataset and modelling scope.
Create IFC with delivery properties
Model elements and fill the agreed information fields.
Separate IDS checks and geometry QA
Use IDS for information fields and a separate report for geometry, scale, coordinates, and modelling limits.
Limits of IDS and IFC checks
IDS does not make a model geometrically correct. An IFC can pass required fields and still be too coarse or unsuitable for the intended planning task.
That is why Voxelia separates information checks from geometric delivery documentation.
Practical rules for clients
Do not request only “an IFC”. Define the model purpose, required elements, properties, coordinate reference, tolerated simplifications, and review files.
Voxelia processes supplied imagery into usable planning data: 3D model, point cloud, orthophoto, CAD extraction, viewer, or BIM-oriented delivery.