Viewpoint selection and photomontage in a TVIA

TVIA viewpoint selection begins as a negotiation with the council rather than a design exercise. The views that end up in a Townscape and Visual Impact Assessment should be agreed with the local planning authority, and with its conservation and landscape advisers, before a single camera is set up. Produce the images first and you have handed the case officer an easy objection, which is that the applicant chose the flattering angles. Agree the schedule first and the argument moves on to what the images actually show.

That sequence is the single thing that separates a visual assessment an officer will rely on from one that gets dismissed in two lines of a committee report.

Agreeing viewpoints before any image is produced

Start with a long list and a request for comment. On a scheme of any size the applicant's landscape consultant prepares a candidate schedule, usually 10 to 25 locations, each with a grid reference, a reason for inclusion and a note of the receptor it represents. That goes to the authority at pre-application stage, and on larger schemes to the county landscape officer, the conservation officer and the relevant parish councils.

Where the proposal is Environmental Impact Assessment development, the viewpoint schedule belongs in the scoping request. A scoping opinion that lists agreed viewpoints is worth a great deal later, because it fixes the scope of the assessment in a document the authority produced itself.

For smaller schemes there is often no formal scoping. Ask anyway. A short email setting out the proposed locations, with a plan, gives you a written record that the authority had the chance to add views and did not.

Choosing views that test the proposal honestly

A view earns its place by representing a receptor, not by being pretty. The schedule should cover the groups of people whose experience changes: residents in named streets, users of a public footpath, visitors arriving at a listed church, drivers on an approach road, people using a park.

Three categories of view do most of the work. Close views where the proposal fills the frame and the question is one of design quality and scale. Middle-distance views where the proposal sits against existing buildings or landform and the question is whether it reads as part of the place. Long views, often from a ridge or a designated landscape, where the question is whether the development breaks a skyline or interrupts a recognised composition.

Then add the views you would rather not include. The worst-case view from the nearest upper-floor window. The gap in the hedge where the site is visible from the lane. The one point on the public right of way where the roofline crosses the tower of the parish church. Officers and objectors will find these, and a schedule that already contains them reads as candid rather than defensive.

Heritage views need separate thought because they are assessed under a different test. Historic England's advice on the setting of heritage assets asks what contribution setting makes to significance, which is a question about the asset rather than about visual amenity. A single photograph can serve both assessments, but the reasoning in the text has to be kept apart. The wider question of how viewpoints are categorised and justified is covered in more detail in our note on viewpoint methodology in a townscape assessment.

Getting the schedule signed off

Expect the authority to add views and to reject some of yours. Both are useful. A view added by the conservation officer and then assessed properly is far harder to argue with than a view the applicant selected.

Record the outcome in a short table in the Townscape and Visual Impact Assessment itself: viewpoint number, location, grid reference, who requested it, and whether it is represented by an annotated photograph, a wireline or a photomontage. Where a requested view was not included, say why. Dense tree cover with no public access is a reasonable answer. Being inconvenient is not.

Camera, lens and survey requirements

The Landscape Institute's technical guidance note on visual representation of development proposals is the reference point in England, and it classifies visualisations into four types running from an annotated photograph up to a verifiable photomontage. Say in the methodology which type each image is. Half the disputes about visual material come from a reader assuming an image is verifiable when the author never claimed it was.

The practical requirements are consistent across most authorities:

1. Full-frame digital camera with a fixed 50 mm lens, which gives a horizontal field of view of roughly 40 degrees and a perspective close to unaided human judgement of scale.
2. Levelled tripod at a stated eye height, commonly 1.5 m to 1.65 m, with the height recorded for each viewpoint.
3. Camera position fixed by survey or by a survey-grade satellite receiver, with the accuracy stated, not a phone location.
4. Target or reference points in the frame that can be identified in the survey data, such as building corners, chimney stacks or lamp columns.
5. A record for every frame of date, time, weather, visibility and lens.
6. Panoramas built by rotating about the nodal point, with the projection method stated, because a cylindrical projection and a planar projection of the same scene are not interchangeable.

What makes a view verified

A verifiable photomontage is one where a third party could repeat the work. The camera position, the orientation, the lens and the three-dimensional model are all tied to surveyed coordinates, and the rendered model is matched to identifiable points in the photograph rather than scaled by eye.

Verification is a method, not a label, so the report has to show it. Include the coordinates, the survey method and its stated accuracy, the model source, and an overlay showing how the model was registered against the reference points. Where the proposal is still at outline stage and the model is indicative, say so plainly and use a wireline rather than a rendered image with invented materials.

And be careful with vegetation in the model. Showing proposed planting at maturity in the year-one image is the most common way a montage loses its credibility. Present the scheme as built, with planting at the size it will be on completion, then show a separate image at 10 or 15 years if the landscape strategy relies on screening over time.

Season, light and weather

Winter views with the leaves off are the worst case for screening by deciduous trees, and in most of England that means photography between late November and early March. Summer views show the condition for the greater part of the year and are the right choice for assessing effects on people using a footpath in July.

Where vegetation does real work in your case, provide both. A single summer photograph of a site screened by a hedgerow of mature oaks invites the question of what happens in February, and an officer who has to ask that question starts to doubt the rest of the assessment.

Conditions matter as much as season. Clear visibility, even light, no low sun in the lens, and no haze across a long view. For long-distance viewpoints the relevant question is whether the site is visible in the conditions that prevail for a good part of the year, so one crystalline day in October is not representative on its own.

Presenting images that will stand up at committee

Print size and viewing distance are part of the information. An image produced for viewing at 300 mm on an A3 sheet gives a false impression of scale when it is projected onto a screen in a committee room, so state the intended print size and viewing distance on every sheet and keep the plates in the paper submission at that size.

Each viewpoint should present the existing view and the proposed view at the same scale, from the same position, with a wireline version available. Annotate the existing view with the site boundary and the features referred to in the text. Number the plates to match the assessment tables so a reader can move between them without hunting.

One habit worth adopting: a viewpoint location plan at a readable scale, showing the camera positions, the direction of view, the site and the designations. Officers use it to check that the schedule covers the receptors they care about, and objectors use it to work out whether their own street was assessed.

The visual material sits inside a broader assessment, and the written baseline still has to do its job, which is the subject of our note on the baseline section of a landscape and visual impact assessment. For rural schemes the same images usually serve a landscape and visual impact assessment prepared to the third edition of the landscape and visual guidelines.

This is general guidance, not legal advice; confirm the visualisation requirements with your local planning authority before commissioning photography, because several authorities publish their own standards.

Visual work of this kind needs a landscape professional and, for verified views, a surveyor. PlanScope drafts the surrounding assessment text and flags where survey data is missing, and you can enter your postcode to see which reports a site is likely to need. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.