Industrial Solutions
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Key Advantage:
High accuracy
High density
Reduces costs
Supports more effective collaboration
Allows clients to virtually visit sites
Increases project understanding from client team members of all experience levels
By combining aerial and mobile mapping technology, Caltech offers affordable and comprehensive rapid as-builts for our clients.
Challenge
The key to a useful as-built survey is to ensure the data accurately reflects the structure as it was actually built, not how it was planned.
As-built surveys of complicated industrial facilities consisting of many overhead pipes, cable trays, buildings, and equipment can be time-consuming. Traditional surveying methods do not provide comprehensive coverage of facilities, and Terrestrial Laser Scanning (TLS) is not always feasible for larger scale projects, nor are the sub-centimetre level accuracies required.
By fusing aerial and terrestrial Mobile Mapping Systems (MMS) lidar and imagery data, Caltech can complete comprehensive as-built surveys in a fraction of the time of other methods, as well as provide the data in collaborative 3D web-based environments.
Solution
To start the process, Caltech’s MMS is mounted on a truck that is then driven across the site, collecting high-density lidar and spherical imagery of the entire facility.
Once terrestrial mobile mapping work is complete, the Caltech team takes to the skies with an Unoccupied Aerial System (UAS) to quickly collect aerial lidar and imagery to complement the terrestrial data.
Armed with these two data sources Caltech’s geospatial experts fuse the data and share it in an ArcGIS Online 3D web experience serving as a digital twin of the site. This provides a single source to view and analyze all the data.
Deliverables provided:
- Classified lidar LAS files
- 3D ArcGIS Online Web Experience
- 360 Degree spherical imagery
- Orthorectified Mosaic Image
- Digital Terrain Model (DTM)
- 3D CAD linework
- Georeferenced PDF
Time: Data acquisition can often be completed over a single eight-hour day. One recent project would have taken over a month with terrestrial laser scanning
Accuracy: The accuracy of MMS data was tested to meet a 6cm Root Mean Square Error (RMSE) horizontal and vertical accuracy class
Quality: Caltech can achieve near 100% coverage of the site
By combining aerial and mobile lidar technologies to create a digital twin, the Caltech team can reduce both the costs and labor required for project work, while at the same time producing highly accurate results that surpass traditional methods and exceed client expectations. This approach also allows clients to visit their facilities digitally, make informed decisions at a distance, and enjoy more productive collaborations with a broad range of team members.