For Ex: If the number of lines between 2 index lines are 5. Determine the height of Mount Price. It is important for the farmer or irrigator to identify the slopes on the land. D 009 -800 N O a) 10 b) 20 D -600 -800 N a) 10 Ob) 20 c) 40 d) 50 Which point (A,B,C, D) has an elevation of 344 feet? which isotopic system should they use. Of the following dated flood events, which one would you expect to happen more often? o drainage ' divide or watershed boundary 1000 ft -::-:: Contour interval 50 Feet Figure 12.5 Flow lines across a topographic surface. Considering the size of the area to be mapped, contour intervals are assumed. Contour lines rules: 1. View Source. Taking the area to be mapped, contour intervals are considered. To keep the contour map simple and easy to read, not every contour line is marked with its elevation reading. 300 A. be found. Considering the size of the area to be mapped, contour intervals are assumed. What is the approximate map relief? Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. the boundary follows the course of the river at the time it was drawn, the river has since moved. In which stage of the cycle of stream erosion is this area? examine the unconformity shown in figure 1.10. what type of unconformity is this? c. Label each mark Scale: Maps come in a variety of scales, covering areas ranging from slope percent = rise/run 100 14. Streams/Rivers Escarpments/Cliffs Note: elevation is metres above sea level; thus, sea level = ______ m. 2. The smallest circles represent the Make sure to zoom out to get a good view of the relevant features. Because there isnt a 60ft contour line on this hilltop, we know that the hills highest point (the crest) is some elevation between 50 and 60ft. 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Write your answer in feet. Therefore the topographic profile in Figure 3.6 represents a profile of the map surface (along the A-B line) that has been vertically exaggerated by 10 times (10X). The more closely spaced the The lines point toward the center of the depression. 400 D. N a) point A 00 D. N a) point A b) point D c) point B d) point What is the latitude for this monument? All Rights Reserved. To illustrate what these hills look like in profile (or, how they would look if you saw them while standing on the ground and looking at them . 9. Keeping the abrupt topography change in mind, which of the following is true? How big is the base (area) of the washington monument in sq feet? A thumbnail version of the map is shown in Figure 7-E7,a larger copy is provided at the back of this lab manual, and your TA will provide you with a full-scale version of the map in lab. A profile may be constructed Example Calculation of Contour Intervals: Factors Affecting Durability of Fiber Reinforced Concrete (FRC), Measuring Tape: Anatomy, Marking, and Steps to Measure, Tacheometric Surveying: Principle, Procedure, and Advantages, Types of Foundation for Buildings and their Uses [PDF], Compressive Strength of Concrete -Cube Test [PDF], Procedure, Results, 16 Types of Heavy Equipment Used in Construction, Calculate Quantities of Materials for Concrete -Cement, Sand, Aggregates, Methods of Rainwater Harvesting [PDF]: Components, Transportation, and Storage, Exploring the Impact of Construction Robots on the Industry, How to Maintain a Brick Chimney for Maximum Efficiency, A Shining Future: The Benefits of Solar Energy, What You Should Know Before Installing Mud Flooring. Q. d. Prepare a vertical If the numbers associated with specific contour lines are increasing, the elevation of the terrain is also increasing. (a) Suggest what the 100S100 \mathrm{~S}100S and 130S130 \mathrm{~S}130S particles might represent, in light of current knowledge of protein synthesis. They are usually mapped with large contour intervals. We further visualize the globally normalized responses of each convolution filter on the image of grating interval 6 in Figure 5 B. On large-scale maps with a lot of topographical detail, the contour interval is usually smaller, while on small-scale maps with less detail, the contour interval is larger. Contour values are in feet. How old is the burial site? Figure 2 is based on a more complicated landscape that I contoured using a dark pen at a 10 m contour interval and using a lighter pen at a 5 m contour interval. tops of peaks, and some are marked with xs with numbers next to them. Which of the following lakes has a shoreline that is most likely at an elevation between 10,240 and 10,320 feet above sea level? The zone from 5100-6400 represents the Earth's ? Definition of Contour: A contour or a contour line may be defined as the line of intersection of a level surface with the surface of ground. What approximate discharge would be associated with a 50 year recurrence interval? So contour interval = 790 m-780 m=10 m. For further query, add a comment. Q. Contour lines tend to enclose the smallest areas on ridge tops, which are often narrow or very limited in spatial extent. Figure 3. How is the top of a mountain shown on a topographic map? How fast was the Pacific plate moving during the last 1.1 million years between the formation of the Big Island and Maui in cm/year? Contour lines that are close together show what type of slope? (1 pt) Examining your map, you will see there is a black line that outlines a rectangle that takes up most of the map area. Write your estimates for the elevation at each waypoint next to the waypoint. available from: Open Geosciences. Log in to TheConstructor to ask questions, answer peoples questions, write articles & connect with other people. How far did the pole move? When we hold a ruler to the y-axis of the topographic profile in Figure 3.6, we see that 0.5 inches = 50ft, which means 1 inch = 100ft on the vertical scale. First Edition. What does each contour line on a map show? Locate the Louisville and Nashville Railroad line just south of Hwy. What shape are the contour lines that cross a valley or stream? It is determined as follows: Let's take an example of two contour lines which are labelled. Refer to the figure below. If the counter interval is 10 feet, which hill (a,b,c) when viewed from the base is 40 feet tall? 31. Pick two contour lines that are next to each other and find the difference in associated numbers. The direction of plate movement in the last 1.1 million years. According to the geothermal gradient, rocks at 500 degrees Celsius will be buried how deep? What is the contour interval of the Figure 9 map (shown at the bottom of the page)? f. Is the elevation of waypoint C > or < waypoint B? They are usually mapped with small contour intervals. If the numbers associated with the contour lines are decreasing, there is a decrease in elevation. Look closely at the topography south of highway, and it changes abruptly. -- - . If the relief is high (bigger change) you will need a bigger contour interval. Betwe View the full answer Transcribed image text: What is the contour interval for the figure below? Based on the assemblage of organisms (A-I) in this sample, what is the age of this rock? The Zone from 0-20 km represents the earths? How does the direction of motion of the Pacific Plate during the last 1.1 million years differ from direction of movement between 4.7 and 7.2 million years ago? 2009-2021 The Constructor. 19. The steepest path on a topographic Surface is always perpendicmar to topographic contour at the point where the flowline crosses the contour. Where does it wind up? An excerpt from a contour map is shown below. Contour lines In a large map, index contour lines are less to keep it simple to read the map easily. The intersection between the landscape and the horizontal paper marks the location of the contour lines on a two-dimensional map. If you were to walk the path of a contour line in real life, you would remain at the same elevation the whole hike, never traveling up or down. In the given figure contour interval is 50 feet. Creating The difference between adjacent contour lines. A standard topographic map uses contour linesto express elevations above sea level and show the shape of the land. Locations A and B are at the same elevation. Be sure to only plot those elevations that are at the intersection of the contour line with line A-B. Using the contour lines, determine the upstream direction of the creek. The direction system is useful but imprecise. The rock that most closely resembles the composition of continental crust based on the description in the previous section is: Based on the choice you made for question 15, what is the density of the rocks that make up continental crust? (5 pts) 7. Refer to the topographic map in Figure 7-E3 for an example of contour lines you can use to help you complete this question. It is usually shown in or near the map's legend. (Hint: Speed= Distance/Time). This makes reading the map easier. Find Sloans Crossing. 225 feet; half the contour interval lower than 250 feet. https://openpress.usask.ca/app/uploads/sites/52/2018/08/SKtopomap_v2.pdf. Now calculate the difference between the two-selected index contour line selected from a map. Description. It is south of Mammoth Cave. Stream If the river on this map is 1.93 miles long, what is the gradient for this river? which organism was the most useful in coming to this conclusion (best fossil index), which organism was the least useful in coming to this conclusion (worst index), how much of the parent isotope would be remaining after 7 half lives have passed, if a radiometric element has a half life of 425 yrs, how old would a rock be that only had 3.125% of the parent isotope remaining, based on your graph approximately how much of the parent isotope would be remaining after 3.5 half lives, based on your graph above approximately how many half lives have passed when only 35% of the parent isotope is remaining, an archeologist finds some cloth at a burial site and wants to determine the age of the remains. Locate the state boundary between Nebraska and Iowa along the Missouri River. Once your points are plotted on the graph paper, you simply connect the dots. Observe the S wave velocities. distance is found on the scale. For small scale maps covering a wide area of varying terrain, For rough topographical map meant for initial assessment only, If a detailed map is to be prepared for execution work, If the ground has large variation in levels, for instance, hills and ponds, No measurement or scaling is required since the contour levels are indicated on the contour lines, The distance must be measured on the map and converted to actual distance by multiplying with the scale of the map, In a given map the contour interval is a constant, The horizontal equivalent varies with slope. Example 1- In the graphic below, what is the vertical distance between the contour lines? . lowest line (which is 6760 feet, and not marked) has an elevation equal or greater For example, if a location point is between the 150 feet and 200 feet contour lines than the elevation is 175 feet (1/2 of 50 feet is 25 feet; 25 feet added to 150=175 feet). Mark The following are general characteristics of contour lines: 1. Dont forget to add a contour line to the map legend! The commonly used contour interval is 20 feet for a 1:24,000 map scale. (The benchmarks have an "x" to locate the spot where the elevation was surveyed). Contour Here two contour line, side by side are 790 m and 780 m. Between them there is no contour line. e. Place the paper 8. First, we must identify the two contours that lie on either side of "P." In some cases the contours that we need are clearly labeled; however, in other instances, you will need to use the contour interval (1,000 feet, in this case) to "count" up or down from a labeled contour. Overview section 7.3 provides background information on contour lines to prepare you for these exercises. (1 pt) Explain in a sentence how a ratio scale works. For this computation, the rise, or vertical ground distance, and run, or horizontal ground distance, are needed. 13. As you look at the map, notice that the contour Please use Occams razor as you answer the questions: use the simplest explanation rather than the most complicated explanation to answer the question. Index contour lines: Every fifth contour line is a thicker, "index" line.At some point along that line, its exact elevation is listed. In what direction was the main river flowing? slope percent = rise/run 100. 1 ft = 24,000 ft, and 24,000 ft x (\(\frac{1\;km}{3280\;ft}\)) = 7.32 km. 1. The calculation of the contour intervals is as below: Firstly locate 2 index contour lines that are labeled with a specific elevation. When the vertical dimension of your graph is different from the horizontal dimension on your map, you may end up with a graph that shows a vertical exaggerationand the features of the Earth represented by your topographic profile may be deformed such as in Figure 3.7. Mark Figure 7-E9 with a line to indicate the distance you used in your calculation. Absolutley amazing app and would definitely recommend. Then, find the difference in elevation between the two points. 2.The contour interval is 0.025 N m 2.The thick black contour is zero.
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