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. Assume value is an integer variable. To show information. What is the change in elevation across each contour interval (i.e., between successive "regular" contours) on this map? Contour plots with Excel and Matplotlib Select the XYZ data arranged as a single range (Range I4:N8 in the data screenshot below). Salmon River This map is a geologic map of glacial geology in the area, drawn You can figure out the elevation of 1 What is the contour interval on this map? What type of plate tectonic boundary is at this exact location? The Contour Interval of the above map us 20 Units. in Figure 9.4, what is the elevation of the intersection of U.S. Route 1 and Maine Route 6 in Topsfield? Inspect the P wave velocities. Now calculate the difference between the two-selected index contour line selected from a map. Use the slope percent equation and solve. The intervals +4tt and 4tt, then, respectively showed intervals ascending and descending from the tonal centre. Figure 3. Example 2- Draw a profile showing the elevations of the contours. They then cross the stream and turn back along the opposite bank of the stream forming a "v". In this case, to find out the intermediate points elevation, contour intervals are used. separating in cm/year? If you were standing in the middle on the intermost contour line hill "c", your elevation would be. Examine unconformities 1 and 2 indicated in Figure 1.9. A topographic map is a precise, graphic representation of the three-dimensional shape of the earth's surface. An error message is displayed. The final answer we get after dividing is the contour interval of the specific topographical map. See the example under CONTOUR/SPACING below. Every sixth contour line has an index contour, which is a bolder or thicker line. A person standing at point "F" would only be visible to a person standing at: Examine the figure below. Figure 7 . Mark This means every point on a contour line has the same altitude as that of the assumed intersecting surface. hillslope: (in feet) between the two points. During the flood event of 9/23/2009, the discharge measured at this gaging station was 21,200 cfs. vertical scales on your topographic profile are not the same. Upon adding divalent ions, she could regain 70S70 S70S particles, but never 1005 or 1305 particles. Mathematically, a contour line is a curve in two dimensions on which the value of a function f (x, y) is a constant. Convergent (Continent-Ocean or Ocean-Ocean). A darker, heavier contour line that is labeled with an elevation. B. Construct flow lines emanating from each point " x " to illustrate the groundwater flow field on the map. 3. slope percent = rise/run 100 Select the The following are general characteristics of contour lines: 1. Write your estimates for the elevation at each waypoint next to the waypoint. 15. Axons from which neuron in the retina make up the optic nerve? Please give your answer in grams/milliliter. Explain why. Do Pole movements seem to be steady every 100 years or variable? Considering the above map, the steps involved in contour interval calculation are. 12. In most maps, every fifth contour line is an index contour. Contours make it possible to show the height and shape of mountains, the depths of the ocean bottom, and the steepness of slopes. It is determined as follows: Let's take an example of two contour lines which are labelled. Contour lines do not cross each other, divide or split. (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. Why does the boundary depart from the river channel? (The benchmarks have an "x" to locate the spot where the elevation was surveyed). British Columbia Topographic Map 092G095. the archeologist determines that there is 16.7% of the parent isotope remaining in the cloth sample. 2009-2021 The Constructor. points. Is Lake Creek flowing into or out of Phelps Lake? which of the following is the best way to obtain an absolute date for the sequence of rocks, the geologist determines there is 78.3% of the parent remaining in the sample that they examine. Show your work. To take the difference, subtract the higher elevated line with the lower elevated line reading. Streams/Rivers Escarpments/Cliffs Creating 8. (3 pts) Based on the scale chosen for you for the topography (vertical axis), calculate the amount of vertical exaggeration on the topographic profile you constructed for question 4. Are streams in this area downcutting or laterally eroding? A rounded contour indicates a flatter or wider drainage or spur. In what general direction is the Pacific Plate moving? For a relief map the contour interval is frequently persistent. On a topographic map, a contour line is a line that depicts ground elevation or depression. The Zone from 0-20 km represents the earths? 200 feet. Flood stage, or bankfull stage, on Sweetwater Creek occurs at a discharge of ~4,500 cfs. Learn more about how Pressbooks supports open publishing practices. Indicators themselves are weak acids or weak bases. (Hint: Speed= Distance/Time). along a line drawn through a portion of a topographic map. For example, the first hill on the left has a top contour line of 50ft. Point D is marked at 10,000 elevation and the next label is marked as 10,500 elevation. How contour lines show a pair of small hills fairmount. Description. Considering the size of the area to be mapped, contour intervals are assumed. 1) The contour interval between contour is 40m. A topographic map may or may not include shaded relief to help visualize steep slopes. We further visualize the globally normalized responses of each convolution filter on the image of grating interval 6 in Figure 5 B. What bearing would you need to walk to go to the Smithsonian from the monument? 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. Find Sloans Crossing. They are usually mapped with small contour intervals. (5 pts) Construct a topographic profile for the map inFigure 7-E6 from position A to A on the graph paper provided in Figure 7-E6 below. The zone from 2900-5100 represents the Earth's ? pressing down on the middle mouse wheel and moving the mouse forward and 250/5 = 50. Does your topographic profile show any peaks or valleys? As contour intervals are for the calculation of vertical elevation of an area, same way to calculate the horizontal distance it is termed as Horizontal Equivalent. Note: there is technically more than one correct answer for some of these questions. Set up the cancellation table so all units will cancel, except the desired unit, feet. Location A is higher. How and why do we divide stars into groups by mass? Start climbing from the foot of a hill toward the top, this is called a rising slope (see Fig. which isotopic system should they use. A contour line is a line drawn on a topographic map to indicate ground elevation or depression. Scale: Maps come in a variety of scales, covering areas ranging from Location B is higher. It is usually shown in or near the map's legend. If the topographic map in Figure 3.6 has a fractional scale of 1:12,000 then 1 inch is equal to 12,000 inches or 1000ft; this 1inch = 1000ft equivalency is for the horizontal scale. Why is mass so important to a stars life? It is a plane section of the three-dimensional graph of the function f parallel to the-plane. 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Topographic In which direction does it flow? The highest point on a topographic map is marked as 345m. 225 feet; half the contour interval lower than 250 feet. General 31. (Answer to the nearest foot.) The steepest slope on this hill can be found on the side that is facing which direction? Consider the ages and positions of the islands listed above along with what you know about plate tectonics and hotspots. Contour interval: The change in elevation from one contour line to the next is always the same within the same map.Many maps have either a 40- or 80-foot contour interval: An 80-foot interval simply means that each contour line is 80 vertical feet away from . Map 10,500-10000=500 feet Between these two contour lines if we count, there are 10 counter lines. contour lines, the steeper the slope. Use a contour interval of 4 inches. look at a map of the Sulphur-Boundary Creek area along the Middle Fork of the which means that every place between the marked 6800 foot line and the next This may be easier to determine by examining the tributaries to the main stream. S waves cant travel through liquids and this depth is where the liquid outer core exists. The elevation at sea level is zero meters. Now look farther south of Sloans Crossing at Hwy. So contour interval = 790 m-780 m=10 m. For further query, add a comment. 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? slope percent = (120ft / 1000ft) 100 = 12% Zoom out and examine the surrounding area, what geological hazards are likely in the area? A standard topographic map uses contour linesto express elevations above sea level and show the shape of the land. The outside of the fiberglass is maintained at 35C35^{\circ} \mathrm{C}35C, and the total heat flow through the copper-fiberglass combination is 52kW52 \mathrm{~kW}52kW. If you were standing in the middle on the intermost contour line hill "c", your elevation would be. example. The shaded areas indicate the 95% confidence intervals. of a hill (or hills). The contour line is a line which defines the outline of an object. (10 pts) Imagine you are a geologist working for the Geological Survey of Canada. refers to height in feet, or meters, above sea level). shows the surface features, or topography of Earth or a certain area. Choose the appropriate profile below. The even spacing indicates the hill has a uniform slope. The gradient of a steam or river is determined by measuring a section of (1 pt) Contour intervals located on this map are few and far between. You can find out exactly how steep the They also show some features made by people such as brodges. Locations A and B are at the same elevation. Note: This lab is in colour. What is the benchmark elevation at Sloans Crossing? What is the latitude on the northern edge of this rectangle? What features would you expect to occur at this type of boundary? . Which of the three proposed plate tectonic mechanisms would NOT occur at this location? A. Contour the water table data, using a contour interval of 10ft. You will receive a link and will create a new password via email. The figure above illustrates various topographic features. The small contour interval, the survey work and plotting have to be more accurate. Constructing a topographic map by drawing in contours can be easily done if a person remembers the following rules regarding contour lines: As you draw a contour line on a map you will notice that the elevations on one side of your line will be lower elevations, and elevations on the other side of your line will be higher elevations. 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. Hint: draw a simple map or a rough cross-section sketch to help illustrate your logic. on the paper the exact place where each contour, stream and hill top crosses There are fossils such as Glossopteris and Lystrosaurus that are found in rocks in South America and Africa that indicate they were part of Pangaea approximately 200 million years ago. Keeping the abrupt topography change in mind, which of the following is true? Where does it wind up? Where do the S wave velocities abruptly change? As you look at the map, notice that the contour "Contour" actually means "outline" in French, which is where the name comes from. For interval 14, the models trained with DeepAugment elicit stronger connections between the endpoints than those without DeepAugment, but the difference is not significant enough. Mountain/Hill Depressions What is the gradient? What shape are the contour lines that cross a valley or stream? for Interpreting Topographic Maps Step-by-step explanation. (5 pts) The following topographic map (Map 7-E3) is from a coastal area and features an interesting geological hazard in addition to the ocean. This page titled 3.6: Drawing Contour Lines and Topographic Profiles is shared under a CC BY-SA license and was authored, remixed, and/or curated by Deline, Harris & Tefend (GALILEO Open Learning Materials) . Transcribed image text: Given that this portion of the Australian plate moves at a speed of 2.2 inches per year, how old are the snake fossils? Usually there are different contour intervals for the different maps. When the contour interval is not specified in the map, it can be calculated as explained in the following sections. Locations A and B are at the same elevation. Based on the drainage pattern type, does the bedrock underlying this area consist of rocks uniformly resistant to erosion or rocks alternating between resistant and non-resistant layers? 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