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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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FEATURE *
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Areas of indeterminate function.
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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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PIT ALIGNMENT *
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A single line, or pair of roughly parallel lines, of pits set at intervals along a common axis or series of axes. The pits are not thought to have held posts.
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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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* Copyright of English Heritage (1999)