Existing Conditions Modeling

A process of developing a 3D model of the existing conditions for an asset, or a specific area within a facility.
The model can be developed based on laser scanning surveys (point cloud scans) or conventional surveying techniques.

Objective:

• Increase quality of design with accurate representation of existing conditions such as existing assets & topography.
• Increase quality of constructability analysis with accurate representation of building shell
• Increase quality of site logistics at with accurate representation of building shell for equipment and material loading

Potential Value:

• Enhances the efficiency and accuracy of existing documentation
• documentation of environment for future uses
• Aids in future modeling and 3D design coordination
• detailed layout information
• Pre-Disaster planning
• Post-Disaster record
• Use for visualization purposes

Resources Required:

• Building Information Model modeling software
• Laser scanning point cloud manipulation software
• 3D Laser scanning
• Conventional surveying equipment

Process:

• Surveyor establishes control points on site, including model base-point, or origin
• Surveyor documents locations of existing conditions such as buildings, utilities and topography
• Design Team precisely locates existing conditions in model and designs new systems

Team Competencies Required:

• Ability to manipulate, navigate, and review a 3D model
• Knowledge of Building Information Model authoring tools
• Knowledge of 3D laser scanning tools
• Knowledge of conventional surveying tools and equipment
• Ability to sift through mass quantities of data that is generated by a 3D laser scan
• Ability to determine what level of detail will be required to add “value” to the project
• Ability to generate Building Information Model from 3D laser scan and/or conventional survey data