Ash Tree Distribution in British Woody Linear Features

569 1km sample squares across Britain provide a national distribution map of ash trees (Fraxinus excelsior). The dataset, derived from the Countryside Survey 2007, records trees within lines of both natural and unnatural shape. It was produced by the Environmental Information Data Centre.

Use Cases

• Model ash tree species distribution across Great Britain using the 1km sample square data.
• Analyze the prevalence of ash trees in natural versus unnatural woody linear features.
• Estimate national ash tree populations by extrapolating from the 569 sample squares using ITE Land Classes.

Strengths

• Data is derived from a systematic national survey covering 569 1km sample squares.
• Includes a distinction between trees in lines of natural and unnatural shape, adding ecological context.
• Provides a national estimate derived from sample data using a standardized classification system (ITE Land Classes).

Limitations

• Data is from a single survey year (2007) and may not reflect current distributions.
• As a derived national estimate, it lacks the raw point-level tree records for granular analysis.
• Sample squares may not capture localized or rare occurrences of ash trees.

Provenance

Source

Environmental Information Data Centre

Collection Method

Derived from Countryside Survey 2007 field data, mapped in sample squares and extrapolated using ITE Land Classes.

Time Range

2007

Freshness

null

Geography

Great Britain