We maintained the same camera and lens settings for all VVM’s to ensure continuity when comparing this proposal from the various vistas.
• Canon EOS 5D Mark iii
• Canon EF 16-35mm f/4L IS USM
• Image Width - 5760 pixels
• Image Height - 3840 pixels
• Bit depth - 24
• Focal Length - 16-35mm
• Horizontal FOV - Variable
• Vertical FOV - Variable
• Exposure - 1/250 sec | F10 | ISO 200
• Files - RAW + JPEG
TRIPOD & LEVEL
As per The Landscape Institute Guidelines for Landscape and Visual Impact Assessment:
3rd edition it is critical that the camera lens is level on all axis. We need to achieve a setup that ensures zero tilting left or right and zero banking forward or backwards.
To achieve this we use a combination of 3 separate levels to ensure accuracy to within +/- 1 degree.
1. The Canon 5D Mark iii - inbuilt digital levelling system
2. The Vanguard tripod head bubble level
3. Fotosnow Professional 3 Axis Bubble Spirit Level hot-shoe mount
On Site Workflow
WORKFLOW USED TO PRODUCE FINAL IMAGE SET
The viewpoint location is established and the tripod is set up. The camera is mounted on the tripod head and levelled so that the lens axis is horizontal; this is achieved by a combination of 3 separate levels to ensure accuracy to within +/- 1 degree allowing the camera to be corrected for both roll and tilt. The subject is then framed and camera settings dialled in.
Once the camera is level the plumb line is placed over the lens at the point of no parallax. The plumb line length is set to 1.65m. (Average human eye level) The tripod centre column is then raised until the plumb line makes contact with the surface below.
Documentation images are taken of the camera and setup for record and evidence if required. The lens is manually focused so that the subject is at the plane of focus. The aperture is set to F10 to create a large depth of field whilst retaining sharpness throughout the image. Image capture button is remote to ensure no shake or movement within the lens and camera. Images are captured in RAW format and JPEG so that the original data is preserved and no “automatic” changes
are, made to the data.
The plumb line and bob are then used as pendulum and swung at the precise angle of the lens. This establishes the viewing angle which is then transferred to the ground using survey spray paint. The cross point is the exact centre of the lens and the arrow is the exact angle of the lens, both of which will be surveyed at a later date.
This process is repeated for all required verified views.
Leica TS16 1 R500 Total Station
Leica Tripods, Poles, Prisims & Tapes
We partner with leading survey teams throughout the UK and Ireland
Once on-site photography is complete we study each photograph and select fixed structural points, typically a minimum of 6 objects. These objects are surveyed and are later used to ensure the 3D model of the proposed building is placed within the existing photograph accurately.
To ensure accuracy at the photo-merge stage we typically require and number of fixed points within the foreground, mid-ground & background.
A number of points will also cross the y axis to establish height, some will cross the x axis to establish width and some will cross the z axis to establish depth within each of the VVM’s.
The survey team document all required structural points relative to a datum point which also relates to the location and levels of the proposal.
DOWNLOAD FULL METHODOLOGY REPORT
Our latest verified view project for The Westbury Hotel, Mayfair, London is now available to download.
WHAT IS INCLUDED IN THE REPORT
Find out how we:
1. Identify required survey points
2. Model points in a 3D space
3. Build a 3D model in a space relative to the proposed
building model/ datum
4. Camera match the two cameras (Virtual & Physical)
and the points at the correct positions
Also known as accurate visual representations (AVR), Verified images, visually verified montages (VVM) and verified photomontages, verified views are highly accurate photomontages which have been created using a methodology which is compliant with the Guidelines for Landscape and Visual Impact Assessment, third edition. A verified view is a photograph captured at a specific recorded location, and merged with a highly accurate 3D model of the proposed scheme and existing survey data of fixed structures within the photograph. The result is a verified photomontage showing the proposal in context with the existing environment, which can then be used to assess the visual impact of a proposed scheme or development. They have become central to the Irish & UK planning system.
Verified views eliminate the guesswork and artistic interpretation associated with photomontages. Using rigorous methodologies set out by the Landscape Institute and London Framework, the results give the actual impression of scale and magnitude of a proposed scheme or development.
Our process for creating verified views is compliant with:
1. The Landscape Institute Guidelines for Landscape and Visual Impact Assessment: 3rd edition.
2. Photography and photomontage in landscape and visual impact assessment Landscape Institute Advice Note 01/11
3. London View Management Framework SPG (March 2012) - Appendix C: Accurate Visual Representations. This document is intended to clearly convey the underlying principles and processes that are used in the production of Verified Views. The information presented in this document will allow a third party to verify the accuracy of the images produced. The “London View Management Framework” has the following to say regarding Verified Views. “By accurately combining an image of a proposed development with a representation of its existing context, verified views explain the location and massing of a proposed development. They may also illustrate additional properties including the degree of visibility, architectural form or choice of materials selected.”
We work with independent House Builders, Estate Agents, Property Developers, Architects and Planning Consultants. Our enviable list of clients include Berkeley Group, Savills, Henry Boot, Acorn Property Group, HAB Housing, London Development Group, and a range of small boutique developers and architectural practices.
We deliver high quality, technically accurate computer generated images (CGI) and a range of associated services which include, 3D property animations, drone videography, photography, photo-montages and visually verified views (VVM).
Our in-house team are qualified in their respective fields to a minimum of degree level, and those working on visually verified montages have a relevant degree in Architecture and a minimum of 5 years experience working within the architectural field.