When contour lines cross a stream valley, their V-shaped bends generally point toward the:
Correct answer: A. Upstream direction
- A. Upstream direction
- B. Downstream direction
- C. Nearest hilltop
- D. Steepest contour slope
Explanation
Contour lines form V-shaped bends pointing upstream when they cross a valley or stream. This occurs because the contour follows the rising ground toward the source of the stream.
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Surveying covers measurement of distances, angles and elevations, traversing, levelling, contouring, plane table work, theodolites, total stations and basic photogrammetry. It includes error adjustment, coordinate calculations, area and volume determination, and the distinction between accuracy and precision, as well as between temporary and permanent adjustments.
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