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How do index contours let you know if the land you are viewing is increasingor decreasing in elevation?

Index contours are thicker and usually labeled with their elevation. By identifying the index contours on a topographic map, you can determine if the land is increasing or decreasing in elevation. If the index contours are closer together, the land is steep, indicating a rapid change in elevation. Conversely, if the index contours are further apart, the land is gradually increasing or decreasing in elevation.


How can index contours be identified?

Index contours on a topographic map can be identified by looking for thicker contour lines compared to the surrounding lines. They are typically labeled with their elevation value. Index contours are used to provide a quick reference to the elevation changes on the map.


How far apart would two successive index contours be on a map with a contour interval of 5 meters?

Two successive index contours would be 10 meters apart on a map with a contour interval of 5 meters. This means that each index contour line represents a change in elevation of 10 meters from the next adjacent line.


Specially drawn contour lines used to represent a round number of feet or meters?

Index contours are specially drawn contour lines that represent a specific round number of elevation, usually labeled with the exact value. They are useful for quickly identifying key elevation points on a topographic map.


How do index contours let you know if the land you are viewing are increasing or decreasing?

Each index contour has an elevation associated with it. When you look at 2 contours, one will have a higher corresponding elevation. As you go from the lower elevation to the higher elevation, you know that the land is increasing in the direction toward the higher elevation. From the higher to the lower elevation, the land is decreasing (sloping downward, decreasing in elevation).


What is the function of a map index?

Alphabetical order


How would you prove that there are no closed contours in the contour plot of a harmonic function?

This is not exactly true as a constant function is harmonic and has closed contours as its contour plot (i.e. the entire plane is closed). However, any function that has closed contours can be shown to be the constant function. Here is how. If, say u, is a harmonic function which is constant on a contour which is closed, then the inside of that contour is a domain (simply connected set if that has any meaning to you). By the maximum and minimum principles respectively, the function u must attain both its max and min on the boundary i.e. the contour. This number is a constant and since the maximum is the same as the minimum we can conclude that the entire function is constant on the insides of the contour. From there we can extend this function to the entire plane by identity principle.


Why are some contours thicker than others?

Contour lines represent elevation on a topographic map. Thicker contour lines are known as index contours and typically represent a significant change in elevation, such as a peak or ridge. They help the reader quickly identify major landforms on the map.


When did The Contours end?

The Contours ended in 1968.


When was The Contours created?

The Contours was created in 1959.


Why the array is starting from zero?

By design; it makes the compiler's work easier. 1-based array's addressing-function: Address (array, index) = Address (array) + (index-1)*Elemsize(array) 0-based array's addressing-function: Address (array, index) = Address (array) + index*Elemsize (array)


What is labeled with the elevation in round units on a topography map?

I think it's an index contour, but I'm not sure.