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Identify the correct characterstic feature of scale choosen to draw profile of ground using profile leveling data
Both horizontal and vertical distances are always plotted to 1 : 1 scale.
Vertical distances are exaggerated as compared to horizontal distances.
Both horizontal and vertical distances are plotted to the same scale.
Horizontal distances are exaggerated as compared to vertical distances.
Vertical distances are exaggerated as compared to horizontal distances.
In profile leveling, vertical scales are intentionally exaggerated compared to horizontal scales to make the minor variations in ground elevation clearly visible on the plotted drawing. If the same scale were used for both, the vertical undulations would appear nearly flat and insignificant due to the large horizontal extent of the survey.
In profile leveling, vertical scales are intentionally exaggerated compared to horizontal scales to make the minor variations in ground elevation clearly visible on the plotted drawing. If the same scale were used for both, the vertical undulations would appear nearly flat and insignificant due to the large horizontal extent of the survey.
Exaggeration┬аRatio=Horizontal┬аScaleVertical┬аScaleтАЛ>1
The horizontal scale is chosen based on the total length of the section, typically 1:1000 to 1:2000. The vertical scale is chosen to be significantly larger, often 1:100 to 1:200, to enhance the vertical relief. This exaggeration ratio, defined as Vertical┬аScaleHorizontal┬аScaleтАЛ, is usually set between 10 to 20 times to facilitate accurate interpretation of slopes and earthwork calculations.
Exaggeration helps in visual identification of terrain profile features.
Horizontal scale represents the plan distance along the alignment.
Vertical scale represents the reduced levels (RL) of ground points.
Higher exaggeration is used for flat terrains to highlight small changes in elevation.
Better readability of vertical undulations.
Precise identification of changes in gradient.
Simplifies calculation of cut and fill quantities.
Distortion of true ground profile shape.
Slopes on the drawing appear steeper than they are in reality.
Highway and Railway alignment surveys.
Canal and Pipeline alignment planning.
Longitudinal section plotting.
Typical vertical exaggeration factor ranges from 10 to 50 depending on the project requirement.
Option A is incorrect as it would make terrain features impossible to distinguish on paper.
Option C is incorrect because standard drawing sheets would be unable to accommodate the long horizontal lengths if the vertical scale were matched to a human-readable scale.
Option D is incorrect as it is physically impossible to exaggerate horizontal distances over vertical distances for ground profiles as it would flatten the relief further.
B is correct тАФ Vertical distances are exaggerated as compared to horizontal distances.
Always remember that horizontal scales in surveying drawings are kept smaller than vertical scales to maintain both map legibility and proper aesthetic relief representation.
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