What are Contour Lines? | How to Read a Topographical Map 101 TAs names: _______________ _______________. which of the above geologic events is the seventh in the sequence? We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. By using a ruler, you can transfer these elevation points from your topographic map straight down onto your graph paper such as shown in Figure 3.6. (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. The overview section 7.4.2 provides useful background to help you answer questions 4 & 5. For 1:25 000 scale maps the interval between contours is usually 5 metres, although in mountainous regions it may be 10 metres. Math can be challenging, but with a little practice, it can be easy to clear up math tasks. trend up valleys and form a "V" or a "U" where they cross Calculate how fast the Hawaiian Islands are sinking, by using the ages and elevations of Maui and Nihoa. Your contour lines will generally fall between the GPS points on your map, so you will need to estimate many of the contour line positions. 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. 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). Description. If you were standing at the washington monument what direction would you need to walk to get to the U.S. capitol building? Question 14. For example, the first hill on the left has a top contour line of 50ft. Challenging deep learning models with image distortion based on the We further visualize the globally normalized responses of each convolution filter on the image of grating interval 6 in Figure 5 B. 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) . The contour interval is 20'. with the labeled contour lines at the bottom of the profile paper and project Trees growing in denser stands experience more competition for essential resources, which can make them more vulnerable to disturbances. From the contour map, a profile can be drawn of the terrain. Please enter your email address. When the contour interval is not specified in the map, it can be calculated as explained in the following sections. Pick two contour lines that are next to each other and find the difference in associated numbers. Performance Assessment of Three Continuous Glucose Monitoring Systems a stream or river and dividing the distance (in miles) into the vertical difference Considering the size of the area to be mapped, contour intervals are assumed. Why? Note: This lab is in colour. All contour lines are spaced at a 20 m contour interval. Please hand in this lab to your TAs at the end of the lab period. First Edition. As a contour approaches a stream, canyon, or drainage area, the contour lines turn upstream. What Is Contour Interval | Calculation of Contour Intervals | Uses of What is the benchmark elevation at Sloans Crossing? Apply the principle of conservation of angular momentum to determine the direction a spacecraft will rotate if an internal gyroscope begins to rotate in the counterclockwise direction. (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. Geology Labs 1-6 (some questions and answers missing) Explain how you made this decision. Flood stage, or bankfull stage, on Sweetwater Creek occurs at a discharge of ~4,500 cfs. What is the change in elevation across each contour interval (i.e., between successive "regular" contours) on this map? look at a map of the Sulphur-Boundary Creek area along the Middle Fork of the Using the contour lines, determine the upstream direction of the creek. A contour line of a function of two variables is a curve along which the function has a constant value, so that the curve joins points of equal value. Note: The intervals are increasing, therefore, the contours indicate a hill. Topographic USask GEOL 121 Rock & Mineral Quiz Information, 8. In the above figure, the dark lines with reading are index contour lines. unit_3_lab_ch.odt - Question 1 (4 points) The river in this figure is Transcribed image text: 400 D. N a) point A 00 D. N a) point A b) point D c) point B d) point What is Contour Interval? Its Calculation and Uses in Surveying . What happens when the lithosphere at point X is heated to 1500 C? At the point where 2 contour lines would cross would have 2 different elevations which is impossible. 5.5 Contour Lines and Intervals | NWCG Low gradient and abundant sediment supply. On a topographic map, a contour line is a line that depicts ground elevation or depression. 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 . Locations A and B are at the same elevation. How big is the base (area) of the washington monument in sq feet? 40 feet. TOPOGRAPHIC MAP EXERCISE - Wenatchee Valley College Topographic Maps Flashcards | Quizlet Information What is the dc saturation current? Here two contour line, side by side are 790 m and 780 m. Between them there is no contour line. All Rights Reserved. distance is found on the scale. For example, if you wanted to do a contour line drawing of a pear, you'd simply draw the outline of the pear, add a stem, and stop there. The rock that most closely resembles the composition of oceanic crust based on the description in the previous section is: Based on the choice you made for question 17, what is the density of the rocks that make up oceanic crust? This is a graded activity, please submit it to your TA at the end of the lab. This makes reading the map easier. How to Draw Contour Line Art: 4 Key Steps - PrepScholar These marked or labeled lines are known or termed as Index Contour Lines. B. f. Is the elevation of waypoint C > or < waypoint B? 14. What is the latitude for this monument? 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. View the full answer. Line 1 starts with the contour interval, not the projection point. It is important for the farmer or irrigator to identify the slopes on the land. Using a contour interval of 40 m, label the elevation of every contour line on the map below. topographic profiles: Remember that topographic maps represent Measure the horizontal map distance between points A and B to get the vertical ground distance. 3. All points on a contour line are at the same elevation. (The benchmarks have an "x" to locate the spot where the elevation was surveyed). Contour: Definition and Methods | Contour |Surveying If so, what are the corresponding highest and lowest elevations? Write your answer in feet. According to your best fit line, what is the recurrence interval of such a discharge? Among other things, a topographic map can be used to measure the average slope Contour chart in excel | Math Index Use the slope percent equation and solve. If oceanic and continental crust collided, based on their densities the __________ crust would sink below the ________crust. A contour is a line drawn on a map that joins points of equal height above sea level. Show your work! What is the elevation of the unlabeled index contour crossing Roaring Creek in the northwest corner of the map? 17. 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). Contour lines What is the contour interval on a map based on? hillslope: What type of process is going on at this location? Provided is a topographic map of a hill with contour lines drawn showing elevation in meters. It is a plane section of the three-dimensional graph of the function f parallel to the-plane. Lab 7 Activity - Laboratory Manual for Earth Science - BCcampus (1 pt) How much higher is Mount Price than Garibaldi Lake? For small contour interval, the money required will also more as the field and office work will be more. 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. . 40 feet - 20 feet = 20 feet Dont forget to add a contour line to the map legend! Plot contours - MATLAB fcontour - MathWorks What features would you expect to occur at this type of boundary? Interpreting Contour Maps | METEO 3: Introductory Meteorology up or down from the nearest index contour line and multiplying by the contour Likewise the "40" contour connects depths of 40 ft below sea level and so on. What important discovery did the researcher miss? 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). Based on your answer to question 6 which of the following statements about the break-up of Pangaea is TRUE? 10. What Is Contour Interval? The speed the islands are sinking can be estimated by measuring the difference in elevation between two islands and dividing by the difference in their ages (this method assumes the islands were a similar size when they were active). What color shows buildings, bridges and railroads? To use the same interval for both x and y , specify xyinterval as a two-element vector of the form [min max]. BIOMEDICINE: Digestive System | Description o. To take the difference, subtract the higher elevated line with the lower elevated line reading. The figure above illustrates various topographic features. Inspect the P wave velocities. Because the stream flows south, contour a, which lies downstream of contour b, must be the lower of the two. 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. (1 pt) Garibaldi Creek is located east of Deadmans Lake (Figure 7-E8). The gradient of a steam or river is determined by measuring a section of They are usually mapped with large contour intervals. map. To determine the elevation of a point on a topographic map: The highest point of the rim of the crater is about 350. 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. 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? (measure the distance across the Pacific at 40 degrees north latitude- basically measure between Northern California and North Korea)? Contour intervals must be obeyed, therefore the contour line elevations can only be multiples of the contour interval . Generally, there are various contour intervals for the various maps. How to Read Topographic Maps - Gaia GPS it shows natural features such as rivers and lakes. for Interpreting Topographic Maps 16. To keep the contour map simple and easy to read, not every contour line is marked with its elevation reading. What does each contour line on a map show? Then add 1 to 5 that becomes 6. the final step is the quotient of the difference between 2 index lines (step 2) and the number of lines in between two index lines plus 1 (step 5). A contour interval is a vertical distance or a difference in elevation between contour lines in a topographic map, index contour lines are bold or thick lines that appear on every fifth contour line and if the number associated with specific contour lines is increasing, the elevation of the area is also increasing. In most maps, every fifth contour line is an index contour. How are depressions marked on a topographic map? b. In which stage of the cycle of stream erosion is this area? Choose the appropriate profile below. (2 pts) What is the ratio scale used on this map? which Geologic Law did you use to come to the conclusion you made in the previous question (figure 1.8)? How far apart are North America and Mainland Asia in cm? contour lines represent steep slopes, conversely, contour lines that are spaced 2. In which stage of the cycle of stream erosion is this area? Scale: Maps come in a variety of scales, covering areas ranging from 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. For example, if your map scale is 1 inch = 50 ft, then one inch on your graphs y-axis should only represent 50ft of elevation. Streams/Rivers Escarpments/Cliffs A topographic map is a precise, graphic representation of the three-dimensional shape of the earth's surface. The contour music definition is the same definition in any medium such as visual art,. See the example under CONTOUR/SPACING below. Which gas station is the most likely source of the gasoline leak? 1 ft = 24,000 ft, and 24,000 ft x (\(\frac{1\;km}{3280\;ft}\)) = 7.32 km. Refer to the figure below. Understanding Topographic Maps - Idaho State University It is thought to have formed by the runoff of either precipitation or groundwater. in Figure 9.4, what is the elevation of the intersection of U.S. Route 1 and Maine Route 6 in Topsfield? CONTOUR/SPACING= Sets spacing for contour labels; default spacing is 5". 225 feet; half the contour interval lower than 250 feet. Note: there is technically more than one correct answer for some of these questions. What approximate discharge would be associated with a 50 year recurrence interval? slope percent = rise/run 100 Why would a smaller ratio scale be used for this map in comparison to the Garibaldi map? Which of the following places represent a Wadati-Benioff zone? Practice Questions on Geological Structures, 7. Comparable to figure 8 D-F in ref. CONTOUR/SIGDIG= Sets the number of digits after the decimal point for contour labels; default is 2. Be sure to only plot those elevations that are at the intersection of the contour line with line A-B. The difference between two adjacent contours is called the contour interval, which is 10 ft for the Figure 2-2 example. Answered: Please draw he contour line of the | bartleby What is the relationship between the relief of an area and the contour interval on a map of he area? Adjacent means next to. Map Example Are the rocks likely tilted and folded or horizontal? The image to the left shows a perspective view of a river mouth at the head of a valley between a steep cliff (to the left) and a smoother slope (to the right). nervous system and circulatory system endocrine and repertory system circulatory and respiratory systems nervous system and endocrine systems . Taking the area to be mapped, contour intervals are considered. Mountain/Hill Depressions Index contours are bold or thicker lines that appear at every fifth contour line. The zone from 5100-6400 represents the Earth's ? PDF 2-1. BATHYMETRIC CHARTS - UMass D What type of tectonic plates are present? Solved What is the contour interval for the topographic map - Chegg What shape are the contour lines that cross a valley or stream? The Wadati-Benioff zone is associated with which type of plate boundary? Index contours increase by 250. The direction of plate movement in the last 1.1 million years. f. Connect the Finding Elevation and contour intervals Quiz - Quizizz as sinkholes, underlying soluble rock was dissolved and area collapsed. quickly and accurately across any straight line on a map by following this procedure: a. Topographic Map Quiz | Earth Sciences Quiz - Quizizz on a map that are produced from connecting points of equal elevation (elevation Mathematically, a contour line is a curve in two dimensions on which the value of a function f (x, y) is a constant. lines enclose smaller and smaller areas. Contour lines make a v pattern as they cross streams and rivers, and the v always points towards the upstream direction. 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 tolerance for compression test results of concrete, according to the standards? General The even spacing indicates the hill has a uniform slope. "Contour" actually means "outline" in French, which is where the name comes from. Widely separated contour lines indicate a gentle slope. Sometimes vertical exaggeration is desiredbut, in some cases, you may not want it. Denser forests across the USA experience more damage from insects and Expert Answer. Uses of Contour Intervals in Surveying - Civil Scoops How contour lines show a pair of small hills The column and row indices of Z are the x and y coordinates in the plane, respectively. The other side is covered with a layer of fiberglass 2.5cm2.5 \mathrm{~cm}2.5cm thick. At 2900 Km the S wave velocity falls to 0. Lakes/Ponds. These same fossils can be found in Australia, which indicates it, along with Antarctica, was also part of Pangaea at that time. He wants to follow the easiest possible path, which means he needs to find the most gentle slope up the mountain. To calculate this divide the distance (in centimeters) between the two islands by the difference in their ages. If you examine the graph showing the topographic profile in Figure 3.6, can you imagine what would happen to your profile if we changed the spacing for elevations on the y-axis? points. Select the correct answer(s) from the questions below: The horizontal distance between points A and B can be measured with a scaled ruler and used to determine the slope percent. do not cross each other, divide or split. Using the surrounding contour lines, what is the approximate elevation of Deadmans Lake? 18. each contour to the horizontal line of the same elevation. Suppose that (x,y,z)=i+k\nabla \varphi(x, y, z)=\mathbf{i}+\mathbf{k}(x,y,z)=i+k. A contour interval is the vertical distance or difference in elevation between contour lines. Explain why. Figure 2 is the cross section along line AB. The Contour Interval of the above map us 20 Units. A profile may be constructed 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. 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. The purpose of this lab is to familiarize students with how to read and use topographic maps.