CH 5:Working with 1:50 000 topographic map
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Questions and Answers

What do contour lines on topographic maps connect?

  • Points of different elevation
  • Points of equal distance
  • Points of equal elevation (correct)
  • Points of equal slope

    • What do close-together contour lines signify on a topographic map?

  • Flat terrain
  • Steep slope (correct)
  • Valley
  • Gentle slope

    • How are cross-sections helpful in understanding terrain?

  • Displaying points of equal distance
  • Providing a top-down view of the landscape
  • Showing only flat terrains
  • Representing elevation profile in 3D (correct)

    • What does a 20 m contour interval signify on a 1:50,000 scale map?

    <p>20 m elevation change</p> Signup and view all the answers

    How is a cross-section constructed on a map?

    <p>By selecting a line across the map and plotting elevations along it</p> Signup and view all the answers

    What type of terrain do far-apart contour lines suggest?

    <p>Gentle slope</p> Signup and view all the answers

    Why do topographic maps use contour lines?

    <p>To depict elevations and terrain shapes</p> Signup and view all the answers

    What is vertical exaggeration used for in drawing cross-sections?

    <p>To enhance the visibility of terrain features</p> Signup and view all the answers

    How is vertical exaggeration calculated?

    <p>By dividing the scale of the vertical axis by the scale of the horizontal axis</p> Signup and view all the answers

    What does intervisibility refer to in geographic terms?

    <p>The ability to see from one point to another without obstructions</p> Signup and view all the answers

    How is intervisibility determined when assessing it through a cross-section?

    <p>Drawing sight lines between points to check for intersecting terrain features</p> Signup and view all the answers

    What does gradient measure in geography and engineering applications?

    <p>The steepness of a slope</p> Signup and view all the answers

    How is gradient calculated?

    <p>By dividing the vertical difference by the horizontal distance between two points</p> Signup and view all the answers

    In a gradient ratio of 1:30, what does this indicate?

    <p>For every 30 meters horizontally, there is a 1 meter vertical rise</p> Signup and view all the answers

    Why are concepts like vertical exaggeration, intervisibility, and gradient crucial in geographic studies and engineering?

    <p>They help understand and predict how changes in terrain affect activities and structures</p> Signup and view all the answers

    What is the purpose of vertical exaggeration in drawing cross-sections?

    <p>To make smaller terrain features more noticeable</p> Signup and view all the answers

    How is vertical exaggeration calculated in drawing cross-sections?

    <p>By dividing the vertical axis scale by the horizontal axis scale</p> Signup and view all the answers

    What does intervisibility assess in geographic terms?

    <p>The ability to see across terrain without blockages</p> Signup and view all the answers

    How is gradient defined in geography and engineering applications?

    <p>The ratio of the vertical change to the horizontal distance</p> Signup and view all the answers

    Why is gradient measurement significant in geographic and engineering studies?

    <p>To assess slope steepness and plan infrastructure</p> Signup and view all the answers

    In a 1:30 gradient ratio, what does this indicate?

    <p>For every 1 meter horizontally, there is a 30-meter vertical rise</p> Signup and view all the answers

    What does a gradient of 1:50 signify?

    <p>$50(1)$ meters rise for every 1 horizontal meter</p> Signup and view all the answers

    What role does intervisibility play in geographic analysis and planning?

    <p>Assessing visibility between different points on the terrain</p> Signup and view all the answers

    What do close-together contour lines typically indicate on a topographic map?

    <p>A steep slope</p> Signup and view all the answers

    On a topographic map, far-apart contour lines are most likely to represent which type of terrain?

    <p>Plateau</p> Signup and view all the answers

    What does a 5 m contour interval signify on a 1:10,000 scale map?

    <p>5 m elevation change</p> Signup and view all the answers

    In a cross-section of a landscape, how are changes in terrain visualized?

    <p>By plotting elevation along a selected line</p> Signup and view all the answers

    What is the primary purpose of constructing a cross-section on a map?

    <p>To represent elevation changes in 3D</p> Signup and view all the answers

    How does a 1:50,000 scale map differ from a 1:10,000 scale map in terms of contour intervals?

    <p>$\text{1:50,000 scale maps use larger contour intervals.}$</p> Signup and view all the answers

    What do contour lines on topographic maps connect?

    <p>$\text{Points of equal elevation}$</p> Signup and view all the answers

    What does a close spacing between contour lines suggest on a topographic map?

    <p>A steep slope</p> Signup and view all the answers

    On a 1:50,000 scale topographic map, what does each contour line typically represent in terms of elevation change?

    <p>20 m</p> Signup and view all the answers

    When contour lines are far apart on a topographic map, what type of terrain are they likely representing?

    <p>A gentle slope</p> Signup and view all the answers

    How does a cross-section help in understanding the terrain on a map?

    <p>By showing the elevation profile in 3D</p> Signup and view all the answers

    What does selecting a line across the map allow you to do when constructing a cross-section?

    <p>Plot elevation changes</p> Signup and view all the answers

    On a 1:10,000 scale map, what is the contour interval typically?

    <p>5 m</p> Signup and view all the answers

    What does vertical exaggeration aim to achieve in drawing cross-sections?

    <p>Enhance the visibility of subtle terrain features</p> Signup and view all the answers

    How is intervisibility determined when analyzing terrain?

    <p>By drawing sight lines between points</p> Signup and view all the answers

    In the context of geography and engineering, what does gradient represent?

    <p>The ratio of vertical change to horizontal distance between points</p> Signup and view all the answers

    How can the vertical exaggeration be calculated in a cross-section?

    <p>By dividing the scale of horizontal axis by that of vertical axis</p> Signup and view all the answers

    What does a gradient of 1:30 indicate in geography and engineering?

    <p>Every 1 meter horizontal distance, there is a 30-meter vertical rise</p> Signup and view all the answers

    What is the primary purpose of drawing sight lines between points in intervisibility assessment?

    <p>To check if lines intersect with terrain features obstructing views</p> Signup and view all the answers

    How do contour lines contribute to understanding terrain features on maps?

    <p>By showing areas with similar elevation levels</p> Signup and view all the answers

    Why is understanding gradient important in geographic and engineering applications?

    <p>To assess the steepness of slopes and potential risks</p> Signup and view all the answers

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