Glossary
| Term | Meaning |
|---|---|
| Area check | Comparing the area in the spreadsheet with the area of the geometry, for the layers where it is turned on. |
| CityGML | The OGC standard for 3D city models, written as XML. Insula3D writes versions 2.0 and 3.0. |
| CityJSON | A JSON encoding of the CityGML data model. Insula3D always writes it. |
| CMIF | The file that carries a scene from 3ds Max, Blender or a model file into Insula3D: geometry, layers, materials and textures (.cmif.json). |
| CRS | Coordinate reference system, named by its EPSG code, such as EPSG:32748. |
| Grade | The result of the checks for one object: Passed, Area mismatch, Recheck, Approximated or Failed. |
| IFC | The buildingSMART standard for exchanging building information. Insula3D writes IFC4 and IFC2x3. |
| Join key | The spreadsheet column that holds the object names and links each row to its object. |
| Layer | The layer an object belongs to in the source model. Each layer has its own output settings. |
| LOD | Level of detail. CityGML 2.0 has LOD 1 to 4; CityGML 3.0 and CityJSON stop at LOD 3. |
| Mapping | The file that says what each spreadsheet column is. It is saved as <spreadsheet>__attr_map.json. |
| Placement | The position, rotation and height that put a local model on the map. |
| Preflight | The check of the inputs before a conversion. |
| Recheck | Reading a written file back to check its geometry, such as open or flipped surfaces. |
| Scan | The view in Diagnostics that darkens the scene and lights up the flagged objects. |
| Semantic surfaces | Faces marked as wall, roof or ground surface. |
| Solid | Geometry made by extruding the footprint of an object to its top, with a flat roof. |
| Storey | A level of a building. CityGML 3.0 and CityJSON write storeys as their own objects. |
| Surfaces | Geometry written as the faces of the model, as they are. |
| Third-party validators | Checkers from other organizations that test the files after a conversion. A pass is not a certification. |
| XSD validation | Checking a CityGML file against the official XML schemas of the standard. |
| xAL | The OASIS address standard that CityGML uses for addresses. |
Parent topic: Reference