Galloper Wind Farm Project - National Infrastructure Planning

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2842_LVIA September 2011 GALLOPER WIND FARM SUBSTATION Appendix 3. Methodology for Preparation of Visuals ZTV Studies 17.1.39. ZTV studies are prepared using the ArcGIS Viewshed routines. This creates a raster image that indicates the visibility (or not) of the points modelled. 17.1.40. The visibility is modelled taking into account both the curvature of the earth and light refraction, in accordance with Scottish Natural Heritage guidance (Visual Representation of <strong>Wind</strong>farms Good Practice Guide, SNH February 2007). Within a ZTV all observers are presumed to be 2m tall (in order to compensate for the likely margin of error within the ground model as indicated within the SNH Guidelines). The ZTV also begins at 1m from the observation feature (for example the development) and will work outwards in a grid of the set resolution (generally 20-30 sq. m) until it reaches the end of the terrain map for the project. 17.1.41. For all plan production LDA Design will produce a ZTV that has an overlay of the 1:50,000 Ordnance Survey Raster mapping in a Bitmap 50% threshold form. The ZTV will be reproduced at either 1:50,000 or 1:100,000 scale depending on the study area. For a typical 25km radius study area, the ZTVs will be printed on an A1 sheet at 1:100,000 scale. Ground Model Accuracy 17.1.42. Depending on the project, different height datasets may be used. Ordnance Survey Landform Profile (roughly linked to quality of 10K mapping) and Landform Panorama (roughly linked to the quality of 50K mapping) are supplied as point datasets from which a triangulated mesh is created within GIS (often referred to as a TIN). Below is listed the different data products and their specifications:
2842_LVIA September 2011 GALLOPER WIND FARM SUBSTATION Product Distance Between Points Landform Profile Landform Panorama Vertical Error Horizontal Error 10m +/- 1.8m +/- 1m 50m +/- 5m +/- 3m 17.1.43. For most purposes, the Landform Panorama data will be used, but on certain occasions more detailed analysis of areas close to the site may be required, in which case, ZTVs based on Landform Profile data with areas of vegetation and building footprints drawn from the OS 1:10,000 mapping may be used. Similarly, more detailed surface mapping products such as Nextmap or LIDAR (also supplied as point datasets) may be used. Wireframes 17.1.44. Wireframes are produced in 6 key stages: 4) Photography is undertaken by a professional photographer using a digital SLR camera and 50mm equivalent lens. A tripod (usually 1.6m high) is used to take overlapping (50%) landscape format photographs which are joined together using Adobe Photoshop software to create a single panoramic image for each viewpoint. These are then saved at a fixed height and resolution to enable correct sizing when reproduced in the final images. The photographer also notes the GPS location of the viewpoint and takes bearings to visible landmarks whilst at the viewpoint. 5) Creation of a ground model and 3D Mesh to illustrate that model - This is created using OS landform panorama point data (or occasionally other terrain datasets where required) and KEY Terrafirma ground modelling software.
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Galloper Wind Farm Project Environm
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GALLOPER WIND FARM ENVIRONMENTAL ST
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2842_LVIA 6 September 2011 GALLOPER
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2842_LVIA 10 September 2011 GALLOPE
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2842_LVIA 154 Receptor, sensitivity
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GALLOPER WIND FARM ENVIRONMENTAL ST
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2842_SLVIA Contents 1.0 Introductio
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2842_SLVIA Appendix Appendix 1: Sea
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2842_SLVIA 1 1.0 Introduction 1.1.1
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2842_SLVIA 3 The majority of the WT
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2842_SLVIA 5 2.0 Assessment Methodo
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2842_SLVIA 7 currently available an
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2842_SLVIA 9 Table 2: Consultation
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2842_SLVIA 11 Consultees Date of Co
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2842_SLVIA 13 3.0 Landscape and Sea
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2842_SLVIA 15 3.2. Landscape Design
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2842_SLVIA 17 Suffolk Heritage Coas
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2842_SLVIA 19 Conservation Areas 3.
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2842_SLVIA 21 � Coastal Dunes and
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2842_SLVIA 23 Coastal Levels 4.2.17
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2842_SLVIA 25 Beyond the ongoing te
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2842_SLVIA 27 4.2.37. This landscap
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2842_SLVIA 29 Sensitivity to Change
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2842_SLVIA 31 seascape and visual e
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2842_SLVIA 33 dominated by the buil
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2842_SLVIA 35 visible from within i
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2842_SLVIA 37 visible from within i
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2842_SLVIA 39 Extensive, long dista
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2842_SLVIA 41 Perceptual Qualities
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2842_SLVIA 43 5.2.4. As can be seen
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2842_SLVIA 45 River Ore and to east
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2842_SLVIA 47 5.4.7. It is assumed
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2842_SLVIA 49 5.8.3. Distances from
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2842_SLVIA 51 Distance and Directio
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2842_SLVIA 53 interest within the v
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2842_SLVIA 55 Viewpoint 5 - Orford
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2842_SLVIA 57 Existing View 5.8.21.
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2842_SLVIA 59 5.8.25. The viewpoint
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2842_SLVIA 61 Table 8: Existing Vie
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2842_SLVIA 63 main effect. There wi
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2842_SLVIA 65 Special Landscape Are
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2842_SLVIA 67 6.3.11. Similarly, fo
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2842_SLVIA 69 6.4. Operational Effe
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2842_SLVIA 71 Table 10: Operational
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2842_SLVIA 73 nature and extent wit
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2842_SLVIA 75 the proposed WTGs of
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2842_SLVIA 77 7.3. Representative V
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2842_SLVIA 79 Magnitude and Signifi
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2842_SLVIA 81 east-southeast sector
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2842_SLVIA 83 horizon line by appro
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2842_SLVIA 85 Viewpoint Viewpoint 5
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2842_SLVIA 87 Alderton and to Oak H
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2842_SLVIA 89 structures/embankment
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2842_SLVIA 91 8.0 Cumulative Effect
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2842_SLVIA 93 8.4. Cumulative Seasc
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2842_SLVIA 95 8.5.2. The assessment
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2842_SLVIA 97 8.5.9. Receptors pass
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2842_SLVIA 99 8.6. Cumulative Viewp
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2842_SLVIA 101 effects. There could
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2842_SLVIA 103 10.0 Summary and Con
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2842_SLVIA 105 between the proposed
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2842_SLVIA 107 10.4. Summary of Cum
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2842_SLVIA Appendix 1: Seascape, La
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2842_SLVIA � The effects of histo
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2842_SLVIA � A desk study of nati
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2842_SLVIA ZTVs and wireframes are
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2842_SLVIA � High - Total or majo
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2842_SLVIA Making positive/adverse
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2842_SLVIA how each of the key char
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2842_SLVIA fact that they are in a
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2842_SLVIA The cumulative assessmen
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2842_SLVIA Appendix 2: Regional Lan
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5 Coastal Dunes and Shingle Ridges
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5 Coastal Dunes and Shingle Ridges
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6 Coastal Levels EP/Edit1/02.08.10
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6 Coastal Levels EP/Edit1/1.10.10 C
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6 Coastal Levels EP/Edit1/1.10.10 t
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7 Estate Sandlands EP/Edit1/02.08.1
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7 Estate Sandlands EP/Edit1/02.08.1
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7 Guidance Note Estate Sandlands EP
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16 Guidance Note Rolling Estate San
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16 Guidance Note Rolling Estate San
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16 Rolling Estate Sandlands EP/Edit
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2842_SLVIA Appendix 3: Methodology
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2842_SLVIA viewpoint is then genera
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2842_SLVIA Appendix 4: Source Docum
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2842_SLVIA Landscape capacity refer
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Galloper Wind Farm Project - National Infrastructure Planning

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