Cropmark

（重定向自Crop marks）

Sketched diagram of a negative cropmark above a wall and a positive cropmark above a ditch

Kite aerial photo of crop marks at Nesley, near Tetbury, Gloucestershire. Cereal crop left, beans right. The relative intensity in the crops was reversed in the near infra-red.

After a long hot dry period, cropmark on a lawn caused by a line of flagstones which the grass had overgrown and buried.

Cropmarks or Crop marks are a means through which sub-surface archaeological, natural and recent features may be visible from the air or a vantage point on higher ground or a temporary platform. Along with parch marks, soil marks and frost marks can reveal buried archaeological sites not visible from the ground.

单词	Crop marks
释义	Crop marks 英语百科 Cropmark （重定向自Crop marks） Cropmarks or Crop marks are a means through which sub-surface archaeological, natural and recent features may be visible from the air or a vantage point on higher ground or a temporary platform. Along with parch marks, soil marks and frost marks can reveal buried archaeological sites not visible from the ground.
随便看	orthogonal group pair Orthogonal groups orthogonal hardware modulation orthogonal hole pattern orthogonal idempotent elements orthogonal illumination orthogonal increment orthogonal increment process orthogonal instruction Orthogonal instruction set orthogonal involution Orthogonalisation orthogonalisations orthogonalise orthogonalised orthogonalises orthogonalising orthogonalities orthogonality orthogonality check orthogonality condition orthogonality conditions orthogonality criterion orthogonality of character orthogonality of columns