what is the contour interval for the figure below?

Why are colors and symbols used on topographic maps? Information Q. First Edition. Location B is higher. Example 2- Draw a profile showing the elevations of the contours. The intersection between the landscape and the horizontal paper marks the location of the contour lines on a two-dimensional map. on the paper the exact place where each contour, stream and hill top crosses Topographic 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. Write your answer in feet. Which of the three proposed plate tectonic mechanisms would NOT occur at this location? S waves cant travel through liquids and this depth is where the liquid outer core exists. 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. which Geologic Law did you use to come to the conclusion you made in the previous question? In most maps, every fifth contour line is an index contour. Observe your best fit line. A contour interval is the vertical distance or difference in elevation between contour lines. Locate the state boundary between Nebraska and Iowa along the Missouri River. These circular patterns indicate hilltops, like in the diagram below (Figure 3.6). (2 pts) What is the gradient between Garibaldi Lake and Mount Price? Scale: Maps come in a variety of scales, covering areas ranging from a stream or river and dividing the distance (in miles) into the vertical difference Now draw contour lines on your map to represent the pyramid in three-dimensions on your map. Q: Refer to figure 23.5. The commonly used contour interval is 20 feet for a 1:24,000 map scale. Please give your answer in grams/milliliter. What is the physical state of a dry mantle rock at point X? Flood stage, or bankfull stage, on Sweetwater Creek occurs at a discharge of ~4,500 cfs. How far have the snake fossils moved apart since they were originally deposited? Mathematically, a contour line is a curve in two dimensions on which the value of a function f (x, y) is a constant. What does each contour line on a map show? (b) Why do you think reassociation to 1005 and 130 S particles did not work? To calculate this divide the distance (in centimeters) between the two islands by the difference in their ages. Sensor stability as characterized through mean absolute differences (MARD) on every study day including only sensors inserted on study day 1. Join now! An incredible app, hundreds of features for every kind of math, and the best part is that it shows u what to do on each step and it explains each step, and, very little ads. It will take approx. At 2900 Km the S wave velocity falls to 0. (b) Notice how a mountain saddle, a ridge, a stream, a steep area, and a flat area are shown with contour lines. How are the tops of hills, mountains or depressions (dips) shown on a topographic map? Are the rocks likely tilted and folded or horizontal? 10. All Rights Reserved. The figure above illustrates a depression and its representation using contour lines. Calculate how fast the Hawaiian Islands are sinking, by using the ages and elevations of Maui and Nihoa. What type of tectonic plates are present? The contour interval is determined by the scale of the map and the degree of relief of the terrain being represented. Why? Sharp contour points indicate pointed ridges. Why is this so? Examine unconformities 1 and 2 indicated in Figure 1.9. The small contour interval, the survey work and plotting have to be more accurate. The difference between Contour intervals and Horizontal Equivalent are tabulated below: Contour Lines and Its Types, Characteristics and Uses in Surveying. These features you are seeing are linear valleys. Adapted by Joyce M. McBeth, Sean W. Lacey, & Tim C. Prokopiuk (2018) University of Saskatchewan from Deline B, Harris R, & Tefend K. (2015) Laboratory Manual for Introductory Geology. Complete this map by adding in contour lines using a contour interval of 100 m. Draw the contour lines so that they are continuous: they will either continue to the edge of the map or form an enclosed circle. Vertical View Source. The contour line is a line which defines the outline of an object. Considering the above map, the steps involved in contour interval calculation are. When she treated such a mixture with EDTA, everything dissociated to 30S30 \mathrm{~S}30S and 50s50 \mathrm{~s}50s particles. What is the dc saturation current? contour lines represent steep slopes, conversely, contour lines that are spaced The Contour Interval of the above map us 20 Units. which of the above geologic events is seventh in the sequence. At the point where 2 contour lines would cross would have 2 different elevations which is impossible. Once your contour lines are drawn, you will notice that you had to draw some lines closer together in some areas and wider apart in other areasand that you may have even enclosed an area by drawing a contour line in a circular pattern. a geologist is trying to date a sequence of sedimentary rocks with abundant fossils and sandstones. Answer the following questions about these waypoints, based on your best guess estimate of the elevation of each waypoint. B. He wants to follow the easiest possible path, which means he needs to find the most gentle slope up the mountain. Contour values are in feet. Therefore, if you print it out in black and white please refer back to the electronic copy to avoid confusion. To show information. What does each contour line on a map show? contour lines, the steeper the slope. (1 pt) If someone decided to climb Mount Price, what would be the easiest and safest route to take? Write your answer in feet. The other side is covered with a layer of fiberglass 2.5cm2.5 \mathrm{~cm}2.5cm thick. The peak is normally considered to be located at half the interval distance. Salmon River This map is a geologic map of glacial geology in the area, drawn C. Submergence and deposition of sedimentary layers 10-13. How is the top of a mountain shown on a topographic map? What is the latitude on the northern edge of this rectangle? A rounded contour indicates a flatter or wider drainage or spur. What do close contour lines represent on a map? A high relief. the entire earth to a city block (or less). 19. Would you expect the gradient of the Missouri River in Nebraska to be greater or less than the gradient that you calculated for the Grape River in Colorado? So contour interval = 790 m-780 m=10 m. For further query, add a comment. 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. CONTOUR/SIGDIG= Sets the number of digits after the decimal point for contour labels; default is 2. Terms and conditions apply. Stream channels radiate outwards like wheel spokes from a high point. Essentially a topographic profile is a side image of a topographic map, but the image is only a representation of the area shown on the line on the topographic map (line A-B on Figure 3.6). scale on profile paper by labeling the horizontal lines corresponding to the In what direction was the main river flowing? In the above figure, the dark lines with reading are index contour lines. Practice Questions on Geological Structures, 7. As a rule, hilltops will be slightly rounded to show a slight increase in elevation to represent the crest of the hill, but be careful not to draw the hilltoptoo high on your graph paper. Biology, 22.06.2019 02:10. Observe the velocities of waves on the graph. Earthwork estimations for any type of structure like bridges, dams or roads can be found out with the help of contour intervals in a map. Orbiting spacecraft contain internal gyroscopes that are used to control their orientation. tilting. Suppose that (x,y,z)=i+k\nabla \varphi(x, y, z)=\mathbf{i}+\mathbf{k}(x,y,z)=i+k. How far did the pole move? refers to height in feet, or meters, above sea level). nervous system and circulatory system endocrine and repertory system circulatory and respiratory systems nervous system and endocrine systems . Introductory Physical Geology Laboratory Manual First Canadian Edition (v.3 - Jan 2020) by Joyce McBeth; Karla Panchuk; Tim Prokopiuk; Lyndsay Hauber; and Sean Lacey is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License, except where otherwise noted. Location B is higher. 1. Write out the longitude for each designated point as was done for Point A Write out the longitude for each designated point as was done for Point A A: Longitudes for the given points are explanied below d. Is the elevation of waypoint D > or < waypoint C? (2 pts) What is the ratio scale used on this map? (in feet) between the two points. Therefore: Rise = change in elevation = top (Point A elevation) minus bottom (Point B . in the southern portion of the map, the area is underlain by limestone. The selection of the contour interval is decided by the survey leader before the start of the mapping process depending upon the ground factors. In Figure 9.4, what is the elevation of the highest point on Farrow Mountain? Locate the Louisville and Nashville Railroad line just south of Hwy. Here two contour line, side by side are 790 m and 780 m. Between them there is no contour line. "Contour" actually means "outline" in French, which is where the name comes from. Contour Lines: Contour lines are used to determine elevations and are lines on a map that are produced from connecting points of equal elevation (elevation refers to height in feet, or meters, above sea level). A person standing at point "F" would only be visible to a person standing at: Examine the figure below. What is the name of the family that contains beryllium? In a large map, index contour lines are less to keep it simple to read the map easily. 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\)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\), Answers to Practice Lab Exercises, Parts A and B, status page at https://status.libretexts.org, Contour lines represent lines connecting points of equal elevation above sea level, Contour lines never cross, split, or die off, Contour intervals must be obeyed, therefore the contour lineelevations can only be multiples of the contour interval. What feature(s) can you observe south of Hwy. Please use Occams razor as you answer the questions: use the simplest explanation rather than the most complicated explanation to answer the question. At what depth will the dry mantle rock at point X begin to melt if it is uplifted closer to Earth's surface and its temperature remains the same? Figure 4: Reading Contour Maps . Contour lines are used to show elevation on a topographic map. In Figure 9.7, what is the elevation of the lowest point in the crater? Q. The zone from 20-2900 Km represents the earth? Determining 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. (Answer to the nearest foot.) Overview section 7.3 provides background information on contour lines to prepare you for these exercises. The given point, 537', therefore, must lie between the 520' and 540' contours (contours aand b). 40 feet. This plate boundary isn't as simple as the previous examples, meaning another nearby plate boundary directly influences it. What are the different types of handrails used in bridges? Contour lines that are very close together indicate a steep slope. 2009-2021 The Constructor. Contour interval calculator - A contour interval in surveying is the vertical distance or the difference in the elevation between the two contour lines in a. . Consideration in making the choice of the proper contour interval . e. Place the paper dimensional space. Expert Answer. with the labeled contour lines at the bottom of the profile paper and project Are streams in this area downcutting or laterally eroding? along a line drawn through a portion of a topographic map. The contour interval (height difference from one contour line to the next) on the 500 mb height map shown above is 3 decameters (abbreviated as 3 dam) or 30 meters (abbreviated as 30 m). Index contours are bold or thicker lines that appear at every fifth contour line. 300 A. What factors control the course of this river? How far apart are North America and Mainland Asia in cm? Use the appropriate conversion factor to convert the horizontal map distance to horizontal ground distance. Please enter your email address. as sinkholes, underlying soluble rock was dissolved and area collapsed. Would the recurrence interval for this flood plot at: Is it possible that a flood with a similar discharge to that of the event from 9/23/2009 could happen again in the next 20 years? The terms below tops of peaks, and some are marked with xs with numbers next to them. it shows natural features such as rivers and lakes. On a topographic map, a contour line is a line that depicts ground elevation or depression. 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). As a contour approaches a stream, canyon, or drainage area, the contour lines turn upstream. For a relief map the contour interval is frequently persistent. Notice the tick marks pointing toward lower elevation. the result from the nearest marked contour line. f. Is the elevation of waypoint C > or < waypoint B? What happens when the lithosphere at point X is heated to 1500 C? Map Example the profile line. An error message is displayed. a. amacrine cells b. photoreceptors c. bipolar cells d. retinal ganglion cells, In Figure 1.8, which of the following rock layers is. Overview section 7.3 provides background information on contour lines to prepare you for these exercises. Go back to the location in Google Earth that you examined for question 36 (46 55 25.66 N 152 01 25.17 E). a stream. (1 pt) Contour intervals located on this map are few and far between. What is the contour interval of the Figure 9 map (shown at the bottom of the page)? Contour lines are used to show elevation on a topographic map. In the context of evolution through natural selection, explain why multicellular organisms have specialized exchange systems and surfaces. The number of contour lines in-between 7000 and 7100 are 4. Which gas station is the most likely source of the gasoline leak? They are usually mapped with small contour intervals. What is the gradient of the GC, What is the contour interval for the map below, Between the index counters on this map, the river gradient is. Contour lines make a v pattern as they cross streams and rivers, and the v always points towards the upstream direction. How far (in Km) did the pole move in one year during this time period? Note: if you are unable to read the contours on the map, view the original map on the web or look at the large printed copy in the lab. Assume value is an integer variable. Follow the creek along its path. The smallest circles represent the (1 pt) Explain in a sentence how a ratio scale works. hillslope: 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? any point by finding the nearest labeled line, counting the number of lines slope percent = rise/run 100 (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. with the elevation of the contour it represents. This content is subject to copyright. Every sixth contour line has an index contour, which is a bolder or thicker line. Contour line art is a method of drawing where you draw only the outline of an object, without any shading. How were you able to come to this conclusion? within the sequence is a distinctive clay layer that under closer inspection is fine grained volcanic ash. In every map, on the right-hand bottom side, the contour interval is described. For the plotting of region, the contour intervals are presumed. What is the area of the slab? To calculate the vertical exaggeration in the topographic profile shown in Figure 3.6 we divide the horizontal scale by the vertical scale: (\(\frac{\frac{1000\;ft}{1\;inch})}{(\frac{100\;ft}{inch}}) = 10\). Trees growing in denser stands experience more competition for essential resources, which can make them more vulnerable to disturbances. What important discovery did the researcher miss? If the counter interval is 10 feet, which hill (a,b,c) when viewed from the base is 40 feet tall? Each contour line shows a different elevation. Does your topographic profile show any peaks or valleys? interval. Note: the maps used in this lab are in colour and the colours have significance in terms of the symbols and patterns used on the maps it is best to print this lab in colour and from a pdf version. She could find, in sedimentation experiments on bacterial lysates, not only 30S,50s30 \mathrm{~S}, 50 \mathrm{~s}30S,50s, and 70S70 \mathrm{~S}70S particles but also some particles that sedimented at about 100S100 S100S and 1305. What is the contour interval? Contour Interval on Topographic Map. Answers: 1 Show answers Another question on Biology. Using the contour lines, determine the upstream direction of the creek. In which zone do the P wave velocities appear to be steadily increasing? Where do the S wave velocities abruptly change? Log in to TheConstructor to ask questions, answer peoples questions, write articles & connect with other people. British Columbia Topographic Map 092G095. than 6760 feet, but less than 6800 feet. If the relief is high (bigger change) you will need a bigger contour interval. Closer distance indicates steep slope and wider distance gentle slope. Also no adds. The gradient of a steam or river is determined by measuring a section of Write your answer in feet. A contour interval is a vertical distance or the difference in the elevation between the two contour lines in a topographical map. 18. Find Sloans Crossing. Upon adding divalent ions, she could regain 70S70 S70S particles, but never 1005 or 1305 particles. Using the speed you calculated in the previous question (and ignoring possible changes in sea level), when will the Big Island of Hawaii sink below the surface of the ocean? Vertical exaggeration is the effect that is created when the horizontal and Its Calculation, Uses and When it is Required, Factors Affecting the Selection of Contour Interval. on a topographic map base. Please hand in this lab to your TAs at the end of the lab period. Please give your answer in grams/milliliter. Figure 2 is the cross section along line AB. Now count the number of non-index lines contour lines between the 2 index contour lines selected for the contour interval calculating in the 1st step. This makes reading the map easier. Considering the map, the following steps are used to calculate the contour intervals calculation as follows . Usually there are different contour intervals for the different maps. of a hill (or hills). Q-What is the contour interval for the topographic map shown below?Ans-Contour interval is the vertical distance between two adjacent contour lines on . Please refer to this Saskatoon topographic map to complete the next three questions. 60 seconds. (measure the distance across the Pacific at 40 degrees north latitude- basically measure between Northern California and North Korea)? Intervals involvinq the tonal centre, and their directions of movement -1 1 0 0 0 -1 0 1 0 0 -9 0 0 0 -8 1 0 0 -7 0 0 0 -6 . What does this type of drainage pattern indicate about the area? which Geologic Law did you use to come to the conclusion you made in the previous question (figure 1.8)? Zoom out and examine the area, what other type of boundary is nearby? Controls the size of characters in the contour labels; default is 0.08". Note: there is technically more than one correct answer for some of these questions.