This Contour Map is part of Section C and should only be used for the answering of the Question: Geologic Geometry Option (Question C-1) - Leaving Cert DCG - Question 1 - 2011

Identify where line AB intersects the contour lines. Use the contour intervals to project these intersection points onto the vertical axis, establishing the corresponding elevations on the profile.

Based on the projected heights from the previous step, sketch the profile outline using a smooth curve that connects the identified points, reflecting the changes in elevation between A and B.

Examine the contour map to find the lowest point of the valley, which is indicated where the contour lines are closest together, generally at the bottom of a 'V' shape on the map.

Locate the contour line that corresponds to the 8m water level. Identify where this contour intersects with any relevant geologic features such as valleys or hills.

On the profile drawn earlier, mark a horizontal line at the 8m level to represent the water level across the profile, using a straight edge for accuracy.

From the profile, draw parallel horizontal lines at every 5m interval to help visualize the change in topography and assist in identifying earthworks required for the roadway.

Using the contour map, locate points on the earthworks curve that correspond to the previously drawn parallel lines. Take care to maintain consistent intervals.

Connect the identified points on the earthworks curve with a smooth line to represent the earthworks needed for the roadway, ensuring accurate representation of elevation changes.

Ensure that the final presentation is clear and neat. Label all essential features on the contour map, profile, and earthworks curve. Provide legends and notes as necessary to enhance understanding.