Countryside Council for Wales Wind Farm Project: Project Planning Document - Pgis_4

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 intervisibility of turbines

III. Source of Model:

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 visibility of each turbine at different heights up the construction

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

1. Illustrations of the number of turbines that area visible from each cell (both scales in Scotland)

2. Grid coverages of visibility levels for each point up the turbine

C. World Wide Web pages

1. Snapshot views of each calculation of visibility level

2. Animation of snapshots showing input DEMs and visibility levels

VIII. Accuracy/Sources of Uncertainty/Method of Handling

A. Error in DEMs (fromPERR_1)

B. Positional error of turbine locations

C. Obstructions to visibility due to surface features

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 visibility levels are calculated according to four points on the turbine: ground level, bottom of rotor arc, hub, top of rotor arc.