As-built documentation of a planetarium

Nicole — Thu, 08 Jul 2021 08:59:30 +0000

Using LIDAR technology for as-built documentation of a planetarium

Thanks to the use of laser scanning and PointCab Origins Pro, placing new projectors is no longer a problem

The precise placement of projectors in specially designed theatre rooms within planetariums is no easy task. Just measuring these rooms, which have sloping floors and domes, is a challenge. In addition, the measurement results and the design proposals derived from them must be communicated clearly and concisely to all project participants.

In the USA, the professionals from Seiler Instrument, more precisely Seiler’s Planetarium Division, are often called in for such jobs. Seiler employee Howard George used to use a combination of manual measurements and a total station for this task- a very time-consuming process. To speed up and simplify the process, laser scanning and PointCab’s point cloud software were therefore used for the first time.

The first step was to employ a handheld GeoSLAM ZEB Revo RT LiDAR scanner that creates 3D point clouds literally in minutes. Then the challenge was to efficiently extract the geometry and features to create BIM models of the spaces and better communicate the design intent to project stakeholders. To achieve this, Howard was provided with a trial version of PointCab 3D Pro (now Origins Pro). This is an easy-to-use point cloud editing and sharing software that was recommended by the Design Solutions team at Seiler. Howard comments, “In non-orthogonal areas like planetariums, PointCab allows me to freely tilt, rotate and magnify data points and orient perspectives. ” Thanks to the PointCab and Revit support, as well as online resources, Howard was able to start modelling from the point cloud within a few days, even as a novice, thanks to PointCab`s 4Revit plugin. This allowed him to simulate the placement of the projectors as-is and quickly create vectorised CAD schematics of the space and installation details. He was thrilled: “PointCab’s software exports 2D images of 3D spaces, but screen sharing the software via Zoom or simply forwarding my results with PointCab Share allows me to walk anyone through my process and show them whatever they want to see.”

Verschiedene Evaluationen in Origins Pro

The powerful combination of LiDAR scanning technology and PointCab Origins Pro has had a profound impact on the schedule and customer experience for these complex projector installations. Howard says: “I’m given metric spherical coordinates from ZEISS to place projectors in relation to the dome. In PointCab, I export Cartesian imperial coordinates to place the projector stands on the floor. Then the PointCab software exports 2D images of 3D spaces to me. Sharing data via PointCab Share (freeware) or screen sharing via Zoom allows me to share each step of the process with everyone and show in detail what is of interest.” In just one week, essential but very time-consuming tasks were thus radically reduced and changed for the better for everyone involved in the project. Once tested, the Seiler Planetarium Division would like to continue to rely on the combination of laser scanning and the PointCab software in the future.

Der Beitrag As-built documentation of a planetarium erschien zuerst auf Pointcab.

Surveying Dunelm House

Freddie — Sat, 01 Dec 2018 13:43:31 +0000

USER STORY

Surveying Dunelm House – home of the Durham Univerity Students' Union (DSU)

Contents

Dunelm House: Why a Precise 3D Survey Was Needed
The Challenge: Complex Roof and Difficult Site Conditions
How the Survey Was Completed: Laser Scanning + GPS
From Point Cloud to Plans: Deliverables in Four Days
How the Digital Survey Supports the Renovation Process

Dunelm House: Why a Precise 3D Survey Was Needed

Dunelm House (1966) is Durham University’s well-known students’ union building. Designed in the post-war modernist style, it sits directly on the steep banks of the River Wear. Furthermore, it is connected to the equally iconic Kingsgate Bridge.

The structure is characterized by exposed concrete and terraced floor levels. A multi-angled, irregular roofscape follows the natural slope of the riverbank. This bold design makes Dunelm House architecturally significant – and challenging to measure.
When leaks appeared across several roof areas, a detailed digital survey was needed. The aim was to document the current condition and guide the renovation.

The Challenge: Complex Roof and Difficult Site Conditions

The student building’s roof consists of intersecting levels, changing slopes, and unconventional angles. Combined with its sloping riverside location, this makes traditional measurement methods unreliable and slow.

To capture the structure accurately and efficiently, the project required a modern surveying approach capable of documenting every plane and surface with precision.

How the Survey Was Completed: Laser Scanning + GPS

The survey was carried out by Bury Associates Ltd using two FARO Focus3D laser scanners. To record the terrain and ensure accurate referencing across the entire site, the team also used total stations and GPS equipment.

This hybrid surveying method made it possible to capture:

the full exterior geometry of Dunelm House,
its complex multi-level roof structures,
and high-precision topographic context along the River Wear.

The result was a detailed point cloud covering the entire building and its surroundings.

We think PointCab Origins is the fastest way to extract plans and sections from point clouds.

Bury Associates Limited

Dez. 2018

From Point Cloud to 3D Model: Deliverables in Four Days

After the scanning process, the data was processed using PointCab Origins, which enabled the team to deliver complete documentation in just four days.
The deliverables included:

orthophotos,
2D floor plans,
sections and elevations,
and a full 3D Revit model created from the processed Origins data.

By exporting PointCab’s results into Autodesk Revit, the project team gained a BIM-ready model with the accuracy needed to analyse the leaking roof and plan the renovation.

How the Digital Survey Supports the Renovation Process

The Dunelm House project shows how 3D laser scanning, precise site measurement, and point cloud processing can deliver fast, reliable results — even for buildings with complex shapes and challenging site conditions.

With the combination of FARO scanners, survey instruments, and PointCab Origins for evaluation, Bury Associates delivered a complete set of renovation-ready outputs, including a detailed Revit model.
This provided architects and engineers with a solid digital foundation for repairing and preserving one of Durham’s most distinctive architectural landmarks.

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Der Beitrag Surveying Dunelm House erschien zuerst auf Pointcab.

Revit Archive - Pointcab