Our verified view methodology is compliant with relevant sections of:Landscape Institute Guidelines for Landscape and Visual Impact Assessment: 3rd edition (April 2013) Landscape Institute Advice Note (March 2011) Photography and Photomontage in Landscape and Visual Impact Assessment London View Management Framework SPG (March 2012) - Appendix C: Accurate Visual Representations
Specific verified view viewpoints are usually determined by the client or the local planning authority. We can also offer advice on shot selection including the preparation a ZTV (Zone of Theoretical Visibility) model to help determine visibility in the surrounding area – this adds to the compilation of data available for any outputs.
Once the viewpoints have been determined, we go on site to take the high resolution photos with a full frame camera. Records are taken such as the time of day, date, and weather conditions to ensure accurate modelling later in the process.
When we're on site, we have a qualified surveyor working alongside us. They will take GPS readings for the camera location and control points (points within the photo that can be aligned with the 3D model) using highly accurate GPS systems. The information collected is then cross referenced with topographical surveys and OS data - so that we can place the photo accurately within the virtual space of the model.
Three dimensional CAD designs can be used for all sorts of different purposes; we need to make sure it’s fit for the purposes of the visualisations - for instance fitting in with the contours of the wider site. We can either work with an existing model – or create one from scratch from 2D drawings and/or sketches together with any available topographic survey data.
The information provided by the surveyor will be used to match the virtual cameras with the physical cameras used on site; virtual control points corresponding to each photo will be aligned with the photographed control points within the base photo. Precise information about the camera, lens, field of view, and resolution will also be matched.
View Creation & Rendering
The modelled view will be overlaid onto the original photograph and all objects, including buildings, walls, cars, trees, plants etc will be masked out to blend the model accurately in the image. A lighting system will be setup to reflect the site conditions as accurately as possible.
All the verified views will be compiled within a document showing each viewpoint and each output associated with it ready for planning submission. Information about the camera, photograph, and location will be presented next to each view together with recommended viewing distances. A project specific verified view methodology will be issued detailing the process carried out by Room60 in completing the work.