AIM: How do we make profiles? Do now: -Take the worksheet from the ... - Free Printable

Problem Description:

The task involves creating a topographic profile along a specified line on a topographic map. The image provided shows a contour map with a red line drawn between points X and Y. The contour interval is given as 20 feet, and the goal is to understand how to draw a topographic profile based on this information.

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Solution Explanation:

#### Step 1: Understand the Contour Map
- Contour Lines: These are lines that connect points of equal elevation above sea level.
- Contour Interval: The vertical distance (elevation difference) between two adjacent contour lines. Here, the contour interval is 20 feet.
- Sea Level: The reference point for elevation. In this map, "Sea Level" is marked at the top right corner.

#### Step 2: Identify Key Elements in the Image
- The red line connects points X and Y.
- The contour lines are concentric circles, indicating a hill or mountainous terrain.
- The elevations are labeled at certain intervals (e.g., 20, 40, 60, 80, 100 feet).

#### Step 3: Determine Elevation Along the Red Line
To create a topographic profile, we need to determine the elevation at various points along the red line. This involves identifying where the red line intersects the contour lines.

1. Point X:
- Point X is located at the outermost contour line, which is labeled as 20 feet.
- Therefore, the elevation at X is 20 feet.

2. Point Y:
- Point Y is located at the innermost contour line, which is labeled as 100 feet.
- Therefore, the elevation at Y is 100 feet.

3. Intermediate Points:
- The red line crosses several contour lines between X and Y.
- By counting the number of contour lines crossed and using the contour interval (20 feet), we can determine the elevation at each crossing point.
- For example:
- The first contour line after X is at 40 feet.
- The next contour line is at 60 feet, then 80 feet, and finally 100 feet at Y.

#### Step 4: Plot the Topographic Profile
A topographic profile is a graph that shows the change in elevation along the red line. To plot it:
1. Draw a horizontal axis representing the distance along the red line from X to Y.
2. Draw a vertical axis representing elevation above sea level.
3. Mark the elevations at each intersection of the red line with the contour lines:
- At X: 20 feet.
- First crossing: 40 feet.
- Second crossing: 60 feet.
- Third crossing: 80 feet.
- At Y: 100 feet.
4. Connect these points with a smooth curve to represent the topography.

#### Step 5: Interpret the Profile
- The profile will show an increasing elevation from X to Y, indicating that the terrain rises as you move along the red line.
- The steepness of the slope can be inferred from the spacing of the contour lines:
- Closer contour lines indicate steeper slopes.
- Wider spacing indicates gentler slopes.

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Final Answer:

The steps to solve the problem are as follows:
1. Identify the contour interval (20 feet).
2. Determine the elevation at points X and Y (20 feet and 100 feet, respectively).
3. Identify the elevations at intermediate points where the red line crosses contour lines.
4. Plot these elevations on a graph with distance along the x-axis and elevation along the y-axis.
5. Connect the points to create a smooth topographic profile.

The topographic profile will show a rising trend from X to Y, reflecting the increasing elevation along the red line.

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\boxed{\text{Follow the steps outlined to create the topographic profile.}}
$$