Hi to All !

Just wanted to share a workflow I have tested recently around reverse engineering buildings ( as architects we call this architectural survey 😃  ! ) Well, the essence is to recreate the existing structure and its environment as true to real life as possible. Traditionally these survey were not done up to the accuracy a professional surveyor would do with the right equipment but things are changing in a good direction.

In my case, I am using drone shots and photogrammetry to create a 3d model, which then comes in CATIA and gets geolocated with the rest of the special data. It could get complemented with ground level LiDAR scans and all in all I get a good accuracy within 5-10 cm (do not laugh as in construction industry that is already good ).

In any case, the main idea is that normally i would use the 2D Skecher and star building the geometry the traditional "CATIA" way with the 2d constraints and parameters, but recently I have been playing with the  Natural shape App and that is the reason i wanted to share this video, as I think it has a lot of potential. It has been improved to a great extent with the possibility to add geometrical/ dimensional constraints and I would like to think of it as some sort of 3D Sketcher where we can associate further feature/geometry to this initial simplified 3D Massing Sketch. 

This will allow to adapt very quickly your developed 3D model base on new data coming form the site. It is very useful to quickly get going mocking up massing and being able to elaborate as things progress and verify onsite dimension on the go.

Let me know if all that makes sense and if any suggestions and comments!

https://youtu.be/UtXrYILhaRc?si=natfozj9MaZXqu_4