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WM
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Warwickshire Museum Aerial Photograph Collection. A collection of oblique and vertical aerial photographs and taken by various organisations and individuals, including the Royal Airforce, The Potato Board, Warwickshire Museum. The collection is held at the Warwickshire Sites and Monuments Record.
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Field Survey
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The term ‘field survey’ is used to describe all work that does not disturb archaeological deposits below the ground through an excavation. Field survey techniques involve recording measurements that help archaeologists draw plans or diagrams of archaeological features. There are a variety of different field survey techniques, including geophysical survey, building recording survey, field walking survey, landscape survey and earthwork survey.
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Cropmark
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Cropmarks appear as light and dark marks in growing and ripening crops. These marks relate to differences in the soil below. For example, parched lines of grass may indicate stone walls. Crops that grow over stone features often ripen more quickly and are shorter than the surrounding crop. This is because there is less moisture in the soil where the wall lies.
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Aerial Photograph
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Aerial photographs are taken during an aerial survey, which involves looking at the ground from above. It is usually easier to see cropmarks and earthworks when they are viewed from above. Aerial photographs help archaeologists to record what they see and to identify new sites. There are two kinds of aerial photographs; oblique and vertical.
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SITE *
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Unclassifiable site with minimal information. Specify site type wherever possible.
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TREE THROW *
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A bowl-shaped cavity or depression created in the subsoil by the long term presence and growth of tree roots or when a large tree is blown over or has its stump pulled out.
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RIDGE AND FURROW *
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A series of long, raised ridges separated by ditches used to prepare the ground for arable cultivation. This was a technique, characteristic of the medieval period.
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PIT *
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A hole or cavity in the ground, either natural or the result of excavation. Use more specific type where known.
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ENCLOSURE *
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An area of land enclosed by a boundary ditch, bank, wall, palisade or other similar barrier. Use specific type where known.
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DITCH *
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A long and narrow hollow or trench dug in the ground, often used to carry water though it may be dry for much of the year.
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TRACKWAY *
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A pathway, not necessarily designed as such, beaten down by the feet of travellers.
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TARGET *
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Any structure or object, used for the purpose of practice shooting by aerial, seaborne or land mounted weapons.
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* Copyright of English Heritage (1999)