Choosing and agreeing viewpoints for an LVIA

Viewpoint selection lvia work decides the outcome of the assessment before a single effect has been judged. Choose twelve viewpoints from which the scheme is screened by a hedge and the conclusions write themselves. Choose the ones an objector would choose and the assessment becomes credible, which is the only state in which its conclusions carry weight with an inspector.

For a planning consultant coordinating the evidence base, this is the stage worth your attention. Everything downstream, the photography, the visualisations, the judgement tables, is expensive to redo if the list is wrong.

Using the zone of theoretical visibility to scope

A zone of theoretical visibility is a computed map of where the development could in principle be seen from, generated from a terrain model and the proposed heights. It is the scoping tool, not the answer.

Two versions are normally produced. A bare-earth model, using a digital terrain model, shows visibility ignoring buildings and vegetation, which overstates the extent very considerably in lowland England. A surface model, using a digital surface model, includes buildings and trees as they were captured, which understates it wherever hedgerows are seasonal or trees are due for felling.

Run both and say what each assumes. State the model resolution, the receptor height used, whether earth curvature and refraction were applied, and the extent of the study area with the reason for that radius. Then use the outputs to identify candidate locations rather than to claim that anywhere outside the zone is unaffected.

The honest framing is that the zone shows where views are theoretically possible, and field work establishes where they actually occur.

Representative, specific and illustrative viewpoints

The guidelines distinguish three purposes, and mixing them up muddles the assessment.

Representative viewpoints stand for the experience of a wider group of receptors who cannot all be assessed individually: a point on a footpath standing for the experience of walking a longer stretch, or a street standing for a residential area.

Specific viewpoints are assessed because that particular view matters: a designed view from a registered park, the approach to a listed building, a recognised vantage point named in a landscape character assessment, or a viewing platform.

Illustrative viewpoints exist to show something rather than to support a judgement, most often a close view of an entrance or a key elevation.

Label each one in the schedule. A reader who can see that viewpoint 7 is representative of a two kilometre stretch of a promoted trail understands why it was chosen. An unlabelled list of twenty locations looks arbitrary even when it is not.

Building the list so it cannot be attacked

Work through receptor groups rather than through the map. The list should cover residents, users of public rights of way, road and rail users, users of recreational and tourism assets, workers where relevant, and people experiencing the setting of heritage assets.

Then check the list against a second set of criteria.

That final row is the one most often missing. Cumulative viewpoints need to be chosen with the other schemes in mind, and they usually sit in different places from the viewpoints chosen for the scheme alone.

Include a viewpoint the scheme looks bad from. It costs you nothing in credibility terms and it buys you a great deal, because an assessment that never shows an adverse view invites the reader to assume one is being hidden.

Agreeing the list with the authority in advance

Send a scoping note before any photography is commissioned. It should contain the zone of theoretical visibility plans with their assumptions, a plan of candidate viewpoints with numbers, a simple site photograph from each candidate, a short justification for each, and a list of any candidates considered and rejected with reasons.

Ask for written agreement. Where the scheme affects a National Park or a National Landscape, copy the relevant authority and any statutory consultee, because their comments at this stage are far less damaging than their comments on a finished assessment.

Three benefits follow. The authority cannot later say the viewpoints were self-serving. The budget is fixed, because a scope agreed in writing cannot expand after the fieldwork. And the rejected candidates list demonstrates that the choice was reasoned, which is the thing an inspector actually tests.

Where agreement cannot be obtained in time, record the request and proceed, then state in the assessment what was requested, when, and what response was received. Silence from an authority is not agreement, but a documented attempt is far better than nothing.

Photography standards and verification

Photography follows the published technical guidance, and the parts that matter most are the ones people skip.

1. Full-frame camera with a focal length equivalent to 50 millimetres for single frames, because it approximates the way a person perceives scale in a view.
2. Tripod at a recorded eye height, normally between 1.5 and 1.65 metres, levelled.
3. Panoramas built by rotating the camera about the no-parallax point, not hand-held.
4. Raw capture retained, with the processing recorded.
5. Metadata for every frame: date, time, weather, visibility, coordinates, camera bearing, focal length and height.
6. Survey-located camera positions and identifiable targets in the view where verifiable visualisations will be produced.

The metadata table is the item that makes a set of photographs into evidence. Without it, a third party cannot reproduce the view and the assessment cannot be checked, which is the standard the guidance is written to. The production of visualisations from those photographs is covered separately in our note on photomontage methodology.

Seasonal timing and vegetation

Photograph in winter where deciduous vegetation provides screening, because leaf-off is the worst case for visibility and an assessment based on summer photography will be dismissed as unrepresentative.

Then think about who is actually there. A promoted trail may be walked mainly between April and October, so the experience being assessed is a summer one even though the worst-case screening is a winter condition. The defensible approach is to photograph in winter for the visibility assessment and to describe the seasonal pattern of use in the judgement, saying plainly which season each conclusion relates to.

Where proposed planting is relied on as mitigation, state the establishment period and assess the effect at year one and at a later year, rather than presenting a mature landscape as the outcome. Hedgerows that will be removed for the access should be shown as removed, not as they appear today.

Presenting viewpoints so they can be checked

The presentation standard is simple to state and often ignored. Each viewpoint gets a location plan showing the position and the bearing, a baseline photograph at the correct printed size with the intended viewing distance stated, the visualisation type used, and the metadata.

Print size matters. A panorama reproduced across an A4 page and viewed at arm's length distorts scale, which is why the guidance specifies sheet sizes and viewing distances. If the assessment will be read on a screen by a case officer, say so and provide the sheets at the intended size as separate files.

Number the viewpoints once and never renumber them. Viewpoint numbers get cited in consultation responses, committee reports and appeal statements, and a renumbering between drafts creates confusion that follows the scheme for years.

A Landscape and Visual Impact Assessment built on an agreed, well-documented viewpoint list is difficult to attack on method, which forces any challenge onto the judgements themselves. That is where you want the argument to be. The same discipline applies to the urban equivalent in a Townscape and Visual Impact Assessment, where the viewpoint list also has to engage with heritage setting.

Start the scoping note before you brief the photographer. Browse all 66 PlanScope report types to see what else the evidence base is likely to need.

This is general guidance, not legal advice; check the position with your local planning authority or a qualified professional before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.