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A bird's-eye view of Tarras and the wider Cromwell Basin is taking place this week as Christchurch Airport continues to lay the groundwork for a new airport in the area.
The aerial survey is being conducted by consultants for the planned development and is to collect topographical data.
The operation would involve flying a small aircraft at a maximum height of 12,000 feet and conforms to Civil Aviation Authority rules.
The exact timing of the flights are dependent on weather conditions.