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| | ENGLISH NATURE - Publications and Maps : Ancient Woodland Inventory (Provisional) |
 | | The ancient woodland inventory has taken two hectares as the minimum area that has been mapped, although where areas have been lost, the remaining area, albeit less than two hectares, has remained on the inventory. |
 | | Ancient semi-natural woodland - ancient woodland sites that have retained the native tree and shrub cover that has not been planted, although it may have been managed by coppicing or felling and allowed to regenerate naturally. |
 | | Ancient woodland is identified using presence or absence of woods from old maps, information about the wood's name, shape, internal boundaries, location relative to other features, ground survey, and aerial photography. |
| www.english-nature.org.uk /pubs/gis/tech_aw.htm (1491 words) |
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