Countryside Council for Wales Wind Farm Project: Project Planning Document - Pgis_3

ORGANISATION AND CONTACT INFORMATION

I. Name: David Miller

II. Organisation: Maculay Land Use Research Institute.

III. Address: Craigiebuckler, Aberdeen, AB15 8QH.

IV. E-mail address: d.miller@macaulay.ac.uk

MODELS USED FOR DATA ANALYSIS

II. Model Name: Calculation of a visibility census

III. Source of Model: Miller and Law (1997)

IV. Computer Language that the model is developed in:- ArcInfo (GRID)

V. Hardware needed to run model: Unix workstation

VI. Data Inputs needed by model:

A. Ordnance Survey Digital Elevation Models - 1:10 000, 1:50 000

B. Wind turbine coverages for Scotland and Wales

VII. Model outputs

A. Tables/Statisics

1. Table/graph of relative visibility by turbine (coloured by farm) for each site

B. Maps / GIS datalayers / 3D models / photographs

1. Illustrations of relative visibility for each area (both scales in Scotland)

2. Grid coverages of relative visibility for each dataset

C. World Wide Web pages

1. Snapshot views of each dataset

2. Animation of snapshots showing input DEMs and visibility census

VIII. Accuracy/Sources of Uncertainty/Method of Handling

A. Error in DEMs (fromPERR_1)

B. Positional error of turbine locations

C. Obstructions to visibility du to surface featurs

IX. Existing linkages between data (eg in databases) and software (eg databases/GIS/Statistical packages)

A. None

X. GIS Software used

A. ArcInfo (version 7), ArcView (version 2)

XI. Modelling Software used

A. ArcInfo (GRID)

XII. Database Software used

A. None

XIII. Any other comments

The surfaces of relative visibility provide a basis for assessing the positioning of the turbines according to the profile of visibility within the area and to illustrate the extremes of visibility levels present within each area.