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| Archaeological landscape survey
        is the study of the impact of man on the visible
        landscape. An overview can be based on documentary
        sources, including aerial photographs, and a walkover of
        the site. More detailed information can be achieved by
        contour survey, earthwork survey and interpretation, or
        full topographic survey of existing features and land
        use. Surveys can be tied in to a local grid, the Ordnance
        Survey grid or both. Various techniques may be used to characterise the landscape to the required level, providing CAD-based maps if needed: - Desk based research | |||
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