Challenge: When applying for a building permit, the submitted building plans often differ from the real situation. How can 3D scans offer a solution?
4000 requests for building permits are submitted in The Hague every year, both for new constructions and for renovations. For renovations, it is legally required to visualize the existing situation by supplying drawings (floor plan, facade, and sections). The drawings are made manually, they take a lot of time and often lead to a discussion on accuracy and correctness. The available building plans for existing buildings are often outdated or incorrect.
What are we looking for?
A solution that allows individuals and companies to make accurate internal and external 3D scans of to be converted buildings and space(s). For example, by using a smartphone or tablet. This scan must have the ability to be converted into a 3D model (e.g. IFC format) in a convenient way. This becomes the basis of the new design and makes the drawing of the existing situation unnecessary. Ideally, the scans of the inside of the building can be linked to the scan of the outside (or to a photo of the facade), so that the dimensions of the layout of the facade can be measured.
What are we not looking for?
The app must be user-friendly and accurate. We are not looking for an app that can only be used by hiring a specialist or equipment (e.g. a laser). The maximum deviation may be 0.1 to 0.2% of the actual dimensions. It is therefore not possible to deviate more than 1.2 centimeters at a distance of 6 meters. The accuracy is less strict for outdoor scans (facade drawings).
What is the impact?
Measuring an average (to be renovated) building takes around 1.5 hours. In addition, it takes around 14-16 hours to draw the existing situation. Apart from this, there will be communication about any unclear or untrue construction drawings of the existing situation. Certainly, with more than 1.000 permit applications for renovations, there is a lot to gain. With the right solution, the applicant, in particular, saves time and money, but the municipality naturally also benefits from high-quality data and a smooth running process.
What can you win?