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OS Card
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Ordnance Survey Record Card. Before the 1970s the Ordnance Survey (OS) were responsible for recording archaeological monuments during mapping exercises. This helped the Ordnance Survey to decide which monuments to publish on maps. During these exercises the details of the monuments were written down on record cards. Copies of some of the cards are kept at the Warwickshire Sites and Monuments Record. The responsibility for recording archaeological monuments later passed to the Royal Commission on Ancient and Historic Monuments.
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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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DROVE ROAD *
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A road or track specifically used by drovers or herders to drive their animals to market.
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SITE *
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Unclassifiable site with minimal information. Specify site type wherever possible.
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SETTLEMENT *
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A small concentration of dwellings.
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FEATURE *
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Areas of indeterminate function.
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ROAD *
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A way between different places, used by horses, travellers on foot and vehicles.
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LINEAR FEATURE *
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A length of straight, curved or angled earthwork or cropmark of uncertain date or function.
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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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SQUARE *
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An open space or area, usually square in plan, in a town or city, enclosed by residential and/or commercial buildings, frequently containing a garden or laid out with trees.
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ROUND *
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A small, Iron Age/Romano-British enclosed settlement found in South West England.
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* Copyright of English Heritage (1999)