The accompanying map, located on the back page of Section A, shows ground contours at five metre vertical intervals - Leaving Cert DCG - Question C-1 - 2022
Question C-1
The accompanying map, located on the back page of Section A, shows ground contours at five metre vertical intervals.
(a) On the map supplied, draw a vertical secti... show full transcript
Worked Solution & Example Answer:The accompanying map, located on the back page of Section A, shows ground contours at five metre vertical intervals - Leaving Cert DCG - Question C-1 - 2022
Step 1
Measure heights and draw horizontal lines.
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Answer
To begin, measure the heights at various points along the AB line from the contour map provided. For every 5-meter interval in height, draw horizontal lines extending across the vertical section to represent these elevations accurately.
Step 2
Projections from intersections between line AB and contours.
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Next, locate where line AB intersects with the contour lines. From these intersection points, drop vertical lines downwards to the horizontal lines drawn previously, marking each height increment clearly.
Step 3
Draw the profile.
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Finally, connect the points obtained from the projections to create a smooth profile curve. Ensure the profile reflects the terrain's natural undulations as indicated by the contour lines.
Step 4
Parallel lines at 5m intervals for embankments.
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Draw parallel lines on the profile at 5-meter vertical intervals above the baseline for embankments. Mark these lines clearly to indicate the section undergoing elevation.
Step 5
Identify points on embankment curve.
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Identify and mark significant points along the curve of the embankment, connecting them smoothly to transition between the elevations.
Step 6
Draw embankment curve.
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Utilize the points identified to sketch a gentle curve that represents the embankment slope, ensuring the transition is gradual and realistic.
Step 7
Parallel lines at 10m intervals for cuttings.
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Draw parallel lines at 10-meter vertical intervals below the baseline for the cutting areas. These lines should reflect the depth of the cuts needed.
Step 8
Identify points on cutting curve.
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Identify and mark important points along the cutting curves. Ensure these points indicate changes in depth for accurate representation.
Step 9
Draw cutting curves.
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Finally, connect the points on the cutting with smooth curves to represent natural geomorphology. Ensure the curves reflect the gradual slope downwards from the existing ground level to the new profile.
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