
ZVI Module
Visual impact and radar visibility mapping for wind turbines
The ZVI (Zone of Visual Influence) module in windPRO makes it easy to calculate and visualize the visibility of wind turbines from any point in the surrounding terrain. Whether you're assessing the cumulative visual impact of a wind farm or ensuring compliance with radar visibility restrictions, ZVI provides the data and visuals you need to make informed planning decisions.
Understand and document how wind turbines are seen in the landscape – from homes, roads, and radar stations
Calculate Wind Turbine Visibility
- See which turbines are fully or partially visible from any location.
- Choose visibility based on hub height or blade tip height.
- Use ZVI to assess how turbines visually affect the landscape.
Measure Visual Impact
- Calculate the vertical subtended angle to show how tall turbines appear.
- Calculate the horizontal subtended angle to show how much of the view the wind farm occupies.
- Use built-in result comparisons to evaluate multiple layouts and minimize visual disturbance.
Plan Around Radar Constraints
-
Use Radar ZVI to identify areas where turbines will not be visible to radar systems.
-
Generate radar planning maps that show suitable turbine placement zones.
-
Calculate clearance heights to ensure safe and compliant turbine locations.
Advanced Terrain and Obstacle Modeling
ZVI uses digital height data (e.g., SRTM, contour lines, grid files) along with buildings, forests, and other obstacles to create accurate terrain models. This allows for detailed line-of-sight analyses between each observation point and each wind turbine, accounting for earth curvature and atmospheric refraction in radar calculations.
Powerful Visualization & Reporting
ZVI delivers professional reports and interactive maps that support your project planning and stakeholder communication:
-
Visibility Maps – Show how many turbines are visible from each location.
-
Subtended Angle Maps – Illustrate the apparent size and spread of wind farms.
-
Radar Maps – Reveal turbine clearance heights and radar blind spots.
-
Pie Charts & Tables – Summarize visual impact across the entire landscape.
-
Layer Comparisons – Instantly compare layout options and turbine configurations.
All results can be exported as high-quality graphics, GIS shapefiles, or Google Earth (KMZ) files.
Seamless Integration with windPRO
ZVI works directly with the BASIS module in windPRO and connects seamlessly with turbine catalogues, terrain data, and imported GIS files. You can easily input and edit:
-
Wind Turbine layouts (including existing and planned WTGs)
-
Height contour lines or elevation grids
-
Obstacles (e.g. buildings, trees, hedges)
-
Areas with specific heights (e.g. forests or urban zones)
-
Radar locations and elevation
Why Choose ZVI?
- Clearly communicate visual impacts to planners, authorities, and the public
- Assess and mitigate turbine visibility from sensitive locations
- Comply with radar interference and visibility guidelines
- Optimize layout for both performance and aesthetics

Want to visualize how your wind farm will appear in the real world?
ZVI shows you where turbines can be seen – and where they can't.
Take a closer look at every windPRO module
windPRO is built around a flexible, modular structure, so you can choose the tools that fit your specific project requirements. Whether you're developing a new wind farm or optimizing an existing one, windPRO has you covered.
BASIS
BASIS
Backbone for the use of windPRO modules. Gives access to a user-friendly GUI for designing wind farm projects.
Energy Modules
LOSS & UNCERTAINTY
Calculation of AEP in a bankable format.
OPTIMIZE
Optimize LCOE, AEP or NPV with load and noise limits.
Operation Modules
TR10 – Quality factor
Post-construction analysis according to German TR10 Guideline.
PERFORMANCE CHECK
Analysis of actual production data from WTGs.
Loads Modules
SITE COMPLIANCE
WTG suitability for site and layout.
LOAD RESPONSE
WTG load estimation and Lifetime Extension.
Environment Modules
Visualization Modules
PHOTOMONTAGE
Visualization of WTGs on photo or artificial landscape.
ANIMATION
Animated presentation of a photomontage. calculations.
SketchUp INTEGRATION
Import and export from SketchUp.