Laser Scanning Survey for Structural Restoration – Medieval City Walls in Italy – Pisa

Location: Medieval City Walls, Pisa, Italy

Deliverables:

  • 3D Point Cloud (Intensity map and grey scale)
  • 2D AUTOCAD drawings, scale 1:20
  • Orthophoto, scale 1:20
  • REVIT 3D Model

Project description:

The laser scanning survey was conducted for the restoration and recovery plan of the mediaeval city walls of Pisa, specifically in the tract between Bastion Stampace and Lungarno Sonnino. The post-production data resulted in 2D graphic designs at a scale of 1:20, detailing the representation of each stone, alongside a 3D model for the interpretation of mechanical instability.

Point Cloud views of the mediaeval city walls of Pisa

Work in progress, scanning on site

The Challenge of Surveying the Damage:

A significant crack traversing both sides of the mediaeval city walls in Pisa, Italy, posed a threat to the stability of this monumental historic defensive structure. To address this challenge, accurate dimensional information was imperative to detect and monitor the structural failure and its potential domino effect on other connected structural elements.

Given the state of degradation and dense vegetation surrounding this portion of the city walls, accessing the top was impractical. Our chosen survey methodology, tailored for remote and non-intrusive reality capture, involved the use of laser scanning. The millimetric accuracy provided by the on-site scan data became a reliable foundation for producing high-resolution and rectified photo collages.

The most critical deliverable for this project was the production of Orthophotos at a scale of 1:20. Each stone was meticulously displayed in high resolution and drawn in CAD to define accurate stonework. Cross-referencing laser scanning data with High-Resolution Orthophotos allowed for the identification of irregularities in the wall texture, including cracks and their consistency, orientation, and direction.

This approach also facilitated the assessment of the state of conservation of mortar between stones, mapping potential losses, and identifying other forms of decay and damage in that portion of the city walls.

A textured Revit 3D Model was also created for the analysis of mechanical instability and the evaluation of structural consolidation. This comprehensive surveying approach not only addressed the immediate structural concerns but also laid the groundwork for a meticulous restoration plan for the mediaeval city walls of Pisa.

Orthophoto used to define the CAD drawing of each single stone

2D Elevation of the surveyed portion of wall at scale 1:20

Using a cherry picker to scan the top of the wall

Orthophoto produced by a collage of closer range photos, digitally rectified and calibrated on scan data

WE LOOK FORWARD TO WORKING WITH YOU

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WHO WE WORK WITH

ARCHITECTS & DESIGNERS

Point clouds/ DWG / Revit

PRIVATE CLIENTS

Pre-construction / as-built surveys and Virtual Design and Construction

CONTRACT ADMINISTRATORS

Quality control during construction

Dr.Thomas Glone
2022-02-17
We hired Red Laser Scanning when we were redeveloping the property. The time frame for job completion was within a week and they did an excellent job. The pricing was clear, detailed, and paid for exactly what I needed.
Jay Sonin
2022-02-16
I normally never write reviews, but red laser scanning did a fantasic job. We hired the company for laser scanning used in surveying and they responded immeditaly and had a helpful team. If you want a job done efficient this is the company to work with
Tania Pash
2020-03-07
Thank you for your hard work! such a pleasure to work with you!
P S
2019-11-07
Great firm who go the extra mile to meet customer requirements and deadlines with superior output! Highly recommended.
Marina Martynenko
2019-10-20
I have never seen a laser scanning service more efficient and easy-going such as Red Laser Scanning. Scanned was made the same week I received the quote and the drawings were here 3 days later. Very good company who deliver quick but quality results.
Kerstin Stockreiter
2019-10-07
We hired red laser for our building site and needed a measured survey. The team were really professional and friendly. I have hired a few companies in the past for a measured survey and found these guys not only did an excellent job but we also got our plans delivered back to us within days. Thanks!
Rikhil Shah
2019-08-24
We have asked Red Laser Scanning to do our floor plans and point cloud for our planning application. Very professional service and Dimitri was very friendly when he came to do the survey. Also competitive pricing. Would recommend!
Lana Begalova
2019-08-08
Very good service! I was looking for a company which can do measured survey for my house in order to obtain planning permission. My architect quoted me twice more for existing plans. I came across Red Laser Scanning and booked the survey for the next day and received drawings three days after. Highly recommended!
Julija Nova
2019-07-03
Would definitely recommend

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