44 Questions
What do contour lines on topographic maps connect?
Points of equal elevation
What do close-together contour lines signify on a topographic map?
Steep slope
How are cross-sections helpful in understanding terrain?
Representing elevation profile in 3D
What does a 20 m contour interval signify on a 1:50,000 scale map?
20 m elevation change
How is a cross-section constructed on a map?
By selecting a line across the map and plotting elevations along it
What type of terrain do far-apart contour lines suggest?
Gentle slope
Why do topographic maps use contour lines?
To depict elevations and terrain shapes
What is vertical exaggeration used for in drawing cross-sections?
To enhance the visibility of terrain features
How is vertical exaggeration calculated?
By dividing the scale of the vertical axis by the scale of the horizontal axis
What does intervisibility refer to in geographic terms?
The ability to see from one point to another without obstructions
How is intervisibility determined when assessing it through a cross-section?
Drawing sight lines between points to check for intersecting terrain features
What does gradient measure in geography and engineering applications?
The steepness of a slope
How is gradient calculated?
By dividing the vertical difference by the horizontal distance between two points
In a gradient ratio of 1:30, what does this indicate?
For every 30 meters horizontally, there is a 1 meter vertical rise
Why are concepts like vertical exaggeration, intervisibility, and gradient crucial in geographic studies and engineering?
They help understand and predict how changes in terrain affect activities and structures
What is the purpose of vertical exaggeration in drawing cross-sections?
To make smaller terrain features more noticeable
How is vertical exaggeration calculated in drawing cross-sections?
By dividing the vertical axis scale by the horizontal axis scale
What does intervisibility assess in geographic terms?
The ability to see across terrain without blockages
How is gradient defined in geography and engineering applications?
The ratio of the vertical change to the horizontal distance
Why is gradient measurement significant in geographic and engineering studies?
To assess slope steepness and plan infrastructure
In a 1:30 gradient ratio, what does this indicate?
For every 1 meter horizontally, there is a 30-meter vertical rise
What does a gradient of 1:50 signify?
$50(1)$ meters rise for every 1 horizontal meter
What role does intervisibility play in geographic analysis and planning?
Assessing visibility between different points on the terrain
What do close-together contour lines typically indicate on a topographic map?
A steep slope
On a topographic map, far-apart contour lines are most likely to represent which type of terrain?
Plateau
What does a 5 m contour interval signify on a 1:10,000 scale map?
5 m elevation change
In a cross-section of a landscape, how are changes in terrain visualized?
By plotting elevation along a selected line
What is the primary purpose of constructing a cross-section on a map?
To represent elevation changes in 3D
How does a 1:50,000 scale map differ from a 1:10,000 scale map in terms of contour intervals?
$\text{1:50,000 scale maps use larger contour intervals.}$
What do contour lines on topographic maps connect?
$\text{Points of equal elevation}$
What does a close spacing between contour lines suggest on a topographic map?
A steep slope
On a 1:50,000 scale topographic map, what does each contour line typically represent in terms of elevation change?
20 m
When contour lines are far apart on a topographic map, what type of terrain are they likely representing?
A gentle slope
How does a cross-section help in understanding the terrain on a map?
By showing the elevation profile in 3D
What does selecting a line across the map allow you to do when constructing a cross-section?
Plot elevation changes
On a 1:10,000 scale map, what is the contour interval typically?
5 m
What does vertical exaggeration aim to achieve in drawing cross-sections?
Enhance the visibility of subtle terrain features
How is intervisibility determined when analyzing terrain?
By drawing sight lines between points
In the context of geography and engineering, what does gradient represent?
The ratio of vertical change to horizontal distance between points
How can the vertical exaggeration be calculated in a cross-section?
By dividing the scale of horizontal axis by that of vertical axis
What does a gradient of 1:30 indicate in geography and engineering?
Every 1 meter horizontal distance, there is a 30-meter vertical rise
What is the primary purpose of drawing sight lines between points in intervisibility assessment?
To check if lines intersect with terrain features obstructing views
How do contour lines contribute to understanding terrain features on maps?
By showing areas with similar elevation levels
Why is understanding gradient important in geographic and engineering applications?
To assess the steepness of slopes and potential risks
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