Level of Detail Specification

When it comes to converting the point cloud into CAD models, it’s crucial to understand that this is still a very time-consuming process. At the stage of submitting the quotation, we would like to know the purpose of the project and have a good understanding of the client requirements. The more we know the better price we can offer also deliverable is more customized to the certain client.

Point cloud survey is very accurate often CAD deliverable plotted from the cloud is “too accurate”. For most applications showing some small deformations on the structural elements my turn to be a disadvantage. Small bent on the pipes or displacement of structural elements may be undesirable.

It’s of importance to specify maximum acceptable deviation between created model and point cloud. The accuracy has also an impact on the time, the higher accuracy (smaller deviation), the project is more time-consuming.

For a better estimation of time needed to process the data, it is important to determine a level of detail of the model. Below you will find examples where we visualize the most common single elements for industrial and architectural projects, divided into levels of detail.

Level 1

Generally used to illustrate overall shapes

  • Presents only overall shapes of modeled parts
  • It is often utilized for general studies of larger installations and for clash detection
  • Least detailed and most generic model.
  • Presents the general form of buildings, structures and equipment,

There are no details like windows, doorways, handrail, valves, and other elements of the service presented

Level 2

It is the most popular type we do. It is balanced between decent level of detail and time (cost) consumption. In most applications level two is sufficient:

  • Used to create a base project in the preliminary concept.
  • Modelled as generic, not annotated and not in a system, just the visible surface elements.
  • The model contains the most important structural elements: openings in the building Floors, walls, Doors, Windows, Columns, Beams, stairs, ramps, ceilings, valves, crawl beams structural member profiles.

Level 3

Used as a base project excluding the construction documentation.

Depending on site conditions, size of parts, access to area etc. this level is recommended for models which will be used for visualizations, or for very sensitive designing works.

  • The model contains all structural elements and basic simplistic architectural details.
  • On this level the inner walls with doors and all installation components are presented including valves with handles/actuators, junction boxes, flanges, control panels, steel member profiles and connections, handrailing and stanchions , pipe supports and guards.

Level 4

Generally used for creating engineering projects as well as for the finishing projects.

  • This level contains in detail all structural elements as well as the architectural ones
  • Even the smallest items of installation and furniture are modelled.
  • External woodwork like doors and windows along with door handles are marked