Laboratory 10: Topographic Maps https://youtu.be/bENEygui4jo A map is a two-dimensional representation of a portion of the Earth’s surface that accurately portrays the locations, shapes, and sizes of the features that it is designed to show. General Map Information Definitions • • • • • • Topography is the differences in elevations of surface features (such as mountains and streams) on an area of land. A topographic map is a two-dimensional (flat) representation of a three dimensional land surface. Relief is the difference in elevation of an area of the Earth’s surface. A quadrangle is a section of the Earth’s surface that is bounded by lines of latitude at the top (north) and bottom (south) and by lines of longitude on the left (west) and right (east). Contour lines are lines on a map connecting points that have the same elevation. This reveals the vertical or third dimension on a map (the topography). Brown is the standard color for contour lines. The contour interval is the difference in elevation between two contour lines. This is always noted on topographic maps, usually at the bottom. Map Symbols The USGS uses standard colors and symbols on topographic maps. Use the USGS key to topographic map symbols when studying topographic maps. Direction This diagram shows general compass directions for a map oriented with geographic north (N) at the top. Commonly, USGS maps are printed in this orientation. https://youtu.be/pvw5ZM1OKcY Questions: General Map Information USE THE TOMS PLACE QUADRANGLE, CALIFORNIA TO ANSWER THE FOLLOWING QUESTIONS. Lab 10: Question 1 HomeworkUnanswered Fill in the Blanks Type your answers in all of the blanks and submit – current answer: When was the map made?- blank1 When was the map made? blank1 – Word Answer Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 2 HomeworkUnanswered What is the contour interval? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 60 ft b 80 km c 20 meters d 40 km Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 3 HomeworkUnanswered In what state is the map area? Type your answer and submit Word Answer – Type your answer and submit Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 4 HomeworkUnanswered Where in the state is the map area? (Click its location on the diagram.) Targets placed: 0/2 Undo Delete selected Remove All You can place up to 2 targets Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 5 HomeworkUnanswered Fill in the Blanks Type your answers in all of the blanks and submit – current answer: What is the name of the quadrangle map to the east of this one? (*Refer to the “ADJOINING 7.5’ QUADRANGLES” grid at the bottom of the map*). – blank1 – To the southwest? blank2 – What is the name of the quadrangle map to the east of this one? (Refer to the “ADJOINING 7.5’ QUADRANGLES” grid at the bottom of the map). blank1 – Word Answer To the southwest? blank2 – Word Answer Unanswered Please select an answer to submit Submit Please select an answer to submit https://youtu.be/ySDl81dCb68 Lab 10: Question 6 HomeworkUnanswered Fill in the Blanks Type your answers in all of the blanks and submit – current answer: What is the elevation of the highest peak (Sherwin) (answer questions with meters after the number)? – blank1 – What is the lowest marked elevation in the map area? (see SE corner)blank2 – What is the relief of the Toms Place Quadrangle? – blank3 What is the elevation of the highest peak (Sherwin) (answer questions with meters after the number)? blank1 – Word Answer What is the lowest marked elevation in the map area? (see SE corner) blank2 – Word Answer What is the relief of the Toms Place Quadrangle? blank3 – Word Answer Unanswered Please select an answer to submit Submit Please select an answer to submit https://youtu.be/Rps5HvWJPjU Lab 10: Question 8 HomeworkUnanswered What is the bench mark elevation near the highway just north of the town Rock Creek? (refer to map symbols key to see the bench mark symbol) Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 5089.5 ft b 2156.2 meters c 3579.5 meters d 2156.2 ft Unanswered Please select an answer to submit Submit Please select an answer to submit USE THE MORRISON QUADRANGLE, COLORADO TO ANSWER THE FOLLOWING QUESTIONS. Lab 10: Question 9 HomeworkUnanswered What is the contour interval? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 40 ft b 20 ft c 60 ft d 80 ft Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 10 HomeworkUnanswered Fill in the Blanks Type your answers in all of the blanks and submit – current answer: What is the name of the quadrangle map to the west of this one? (*Look along the edges of the map*) – blank1 – To the north? – blank2 What is the name of the quadrangle map to the west of this one? (Look along the edges of the map) blank1 – Word Answer To the north? blank2 – Word Answer Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 11 HomeworkUnanswered Fill in the Blanks Type your answers in all of the blanks and submit – current answer: What does this map symbol represent? – blank1 What does this map symbol represent? blank1 – Word Answer Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 12 HomeworkUnanswered Which one of these is an example of the above listed symbol? (look near Camp George West National Guard) Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Golden Hill Cemetary b Union Square Park c Solar Energy Research Institute d Pleasant View School Unanswered Please select an answer to submit Submit Please select an answer to submit Latitude and Longitude https://youtu.be/cTrsvGytGG0 Latitude and longitude is an imaginary grid system used to describe locations on the Earth’s surface. The reference line for latitude is the equator (0°latitude). Parallel lines north and south of the equator are parallels of latitude. The reference line for longitude is the prime meridian (0°longitude) which runs through Greenwich, England. Lines of longitude (meridians of longitude) are not parallel and intersect at the Earth’s poles. Latitude and longitude are measured in degrees. One degree can be subdivided into 60 minutes. One minute can be subdivided into 60 seconds. 1° = 60’ 1’= 60” The following diagram is a simplified version of the TOMS PLACE QUADRANGLE, CALIFORNIA showing the latitude and longitude information. The coordinates of map features can be estimated using these marked locations as guides. Note that on the margins of the map only the minutes and seconds are written but at the corners degrees are also included. The change in latitude from the southern end of the map (37°30’) to the northern end (37°37’30”) is 7’30” (7 minutes 30 seconds) or 7.5 minutes of latitude. Similarly, the change in longitude from the eastern side of the map (118°37’30”) to the western side of the map (118°45’) is 7.5 minutes of longitude. Therefore, this is a 7.5 minute series map. TOMS PLACE QUADRANGLE, CALIFORNIA 7.5 minute series map Questions: Latitude and Longitude Lab 10: Question 13 HomeworkUnanswered Using the previous figure, match the corresponding latitude and longitude to the nearest 30″ Drag and drop options on the right-hand side and submit. For keyboard navigation…SHOW MORE Press space or enter to grab Latitude: 37° 37’ 00’’ Longitude 118° 44’ 30’’ • A Latitude: 37° 37’ 00’’ Longitude 118° 44’ 30’’ Press space or enter to grab Latitude: 37° 35’ 00’’ Longitude: 118° 40’ 00’’ • B Latitude: 37° 35’ 00’’ Longitude: 118° 40’ 00’’ Press space or enter to grab Latitude: 37° 32’ 30’’ Longitude: 118° 42’ 30’’ • C Latitude: 37° 32’ 30’’ Longitude: 118° 42’ 30’’ Press space or enter to grab Latitude: 37° 32’ 00’’ Longitude: 118° 40’ 00’’ • D Latitude: 37° 32’ 00’’ Longitude: 118° 40’ 00’’ Unanswered Submit REFER TO THE TOMS PLACE QUADRANGLE, CALIFORNIA MAP. Determine the latitude and longitude of the following feature to the nearest 30”. Lab 10: Question 14 HomeworkUnanswered Match the correct Latitude and longitude of the following features to the nearest 30’’ Drag and drop options on the right-hand side and submit. For keyboard navigation…SHOW MORE Press space or enter to grab Latitude: 37° 33’ 30’’ Longitude: 118° 40’ 30’’ • The gravel pit near Tom’s Place in the center of the map Latitude: 37° 33’ 30’’ Longitude: 118° 40’ 30’’ Press space or enter to grab Latitude: 37° 31’ 00’’ Longitude: 118° 39’ 00’’ • Round Mountain in the NE corner of the map Latitude: 37° 31’ 00’’ Longitude: 118° 39’ 00’’ Press space or enter to grab Latitude: 37° 37’ 00’’ Longitude: 118° 38’ 30’’ • Sky Meadow Ranch in the SE corner of the map Latitude: 37° 37’ 00’’ Longitude: 118° 38’ 30’’ Unanswered Submit https://youtu.be/FqJrmnQ9sBs Map Scale The scale of a map is the relationship between distance on the map and distance on the Earth’s surface. Map scale can be given as: a ratio scale; the dimensions of latitude and longitude of the map area; and a graphic bar scale. 1. Ratio scale (Scale is expressed as a ratio: such as 1:24,000) Using a 1:24,000 map as an example; 1 inch on the map surface represents 24,000 inches on the Earth’s surface or 1 centimeter on the map surface represents 24,000 centimeters on the Earth’s surface, and so on. Standard USGS (United States Geological Survey) topographic maps are made at different scales: 1:250,000, 1:100, 000, 1:62,500 and 1:24,000. On USGS topographic maps the scales are placed at the bottom center of the map. Different scale maps are needed depending on what the map is being used for. A map showing a smaller geographic area will have more details such as the location of a specific building. A map showing a large geographic area will have less detail. Below you can see this dilemma of detail versus the area covered in maps of different scale which all show Ennis, Montana. Maps of Ennis, Montana showing three different map scales 2. Latitude and longitude covered by the map Topographic maps published by the USGS at different scales have specific dimensions of latitude and longitude. A map that covers 7.5 minutes of latitude and 7.5 minutes of longitude is called a 7.5 minute series map. A 7.5 minute series map has a ratio scale of 1:24,000. A 15 minute series map has a ratio scale of 1:62,500 (See the figure below). 3. Graphic scale is shown as a scale bar divided into units of surface distance. There are usually 3 graphic scales: feet, miles, and kilometers. Below is the graphic scale for a 1:24,000 or 7.5 minute map. Note the 0 (zero) is in the middle of the scale bar. Questions: Map Scale REFER TO THE PREVIOUS THREE MAP INSET OF ENNIS MONTANA AT DIFFERENT SCALES Lab 10: Question 15 HomeworkUnanswered Which scale map shows more land surface? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 1 :100,000 b 1 :62,500 c 1 :24,000 Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 16 HomeworkUnanswered Which scale map would be best for locating an individual building? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 1 :100,000 b 1 :62,500 c 1 :24,000 Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 17 HomeworkUnanswered On a 15 Minute Series map, 1 cm on the map = _ cm on the Earth’s surface? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 100,000 b 62,500 c 24,000 Unanswered Please select an answer to submit Submit Please select an answer to submit REFER TO THE MORRISON QUADRANGLE, COLORADO MAP Lab 10: Question 18 HomeworkUnanswered What is the ratio scale of the map? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 1 : 100,000 b 1 : 62,500 c 1 : 24,000 Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 19 HomeworkUnanswered Using the ratio scale, how many inches on the ground are represented by 1 inch on the map? 1 map inch = ________________ inches on the Earth’s surface (answer cannot have a comma in it) Type your numeric answer and submit Numeric Answer – Type your numeric answer and submit Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 20 HomeworkUnanswered How many miles is this? (1 mile = 63,360 inches) (round to nearest hundredth) 1 map inch = ________________ miles on the Earth’s surface Type your numeric answer and submit Numeric Answer – Type your numeric answer and submit Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 21 HomeworkUnanswered List three ways to determine that the Morrison Quadrangle is a 7.5 minute series map. Unanswered Please select an answer to submit Submit Please select an answer to submit Direction and Distance Between Two Locations For some purposes it may be useful to describe one location by its distance and direction from another location. Distance can be measured using the graphic scale at the bottom of the map. Questions: Direction and Distance Between Two Locations REFER TO THE MORRISON QUADRANGLE, COLORADO MAP For the next 3 questions, please refer to the statement below: Determine the direction between the following locations. Lab 10: Question 22 HomeworkUnanswered Fill in the Blanks Type your answers in all of the blanks and submit – current answer: From Red Rocks Community College to Green Mountain Church. (*Look on the right side of the map about 7 inches from the top*). Your answer should be one of these : N , S , E , W , SE , SW, NE , NW Direction – blank1 From Red Rocks Community College to Green Mountain Church. (Look on the right side of the map about 7 inches from the top). Your answer should be one of these : N , S , E , W , SE , SW, NE , NW Direction blank1 – Word Answer Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 23 HomeworkUnanswered Fill in the Blanks Type your answers in all of the blanks and submit – current answer: From Bear Creek Golf Club to Dunstan Middle School. (*Look on the right side of the map about half way between the top and bottom*). Direction – blank1 From Bear Creek Golf Club to Dunstan Middle School. (Look on the right side of the map about half way between the top and bottom). Direction blank1 – Word Answer Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 24 HomeworkUnanswered Fill in the Blanks Type your answers in all of the blanks and submit – current answer: From Pleasant View School (*top center*) to Welchester School (*top right corner*). Direction – blank1 From Pleasant View School (top center) to Welchester School (top right corner). Direction blank1 – Word Answer Unanswered Please select an answer to submit Submit Please select an answer to submit The Public Land Survey System (AKATownship and Range) Township and range lines form a grid which uses a six mile square as the basic unit for each congressional township. Township lines are drawn every six miles north and south of a base line. Range lines are drawn every six miles east and west of a principle meridian. Each congressional township is subdivided into 36 sections (each being 1 square mile). Each section may be divided into quarter sections, each quarter into quarters, and each quarter-quarter into quarters. The location of the letter X is NE ¼, SE ¼, NW ¼, Sec. 25, T.2 S, R.4 W ENNIS QUADRANGLE, MONTANA 7.5-MINUTE SERIES Questions: Public Land Survey System Lab 10: Question 25 HomeworkUnanswered Using the figure above: What is the best answer using the public land survey for letter B Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a SE 1/4, NW 1/4, SW 1/4, Sec. 6, T.6S, R.1E b SE 1/4, NW 1/4, SW 1/4, Sec. 5, T.5S, R.1E c SW 1/4, NE 1/4, NW 1/4, Sec. 6, T.6S, R.1W d NE 1/4, NE 1/4, NE 1/4, Sec. 6, T.6S, R.1E Unanswered Please select an answer to submit Submit Please select an answer to submit REFER TO THE ENNIS QUADRANGLE, MONTANA (7-MINUTE SERIES MAP) Lab 10: Question 26 HomeworkUnanswered What townships are on this map? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a T 5S, T 4S, T 6S b T 5S, T 6S, T 7S c T 4S, T 5S, T 6S d T 3S, T 4S, T 5S Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 27 HomeworkUnanswered What Ranges are on this map? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a R 1W, R 2 W b R 2 E, R 1 E c R 1 W, R 2E d R 1 W, R 1 E Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 28 HomeworkUnanswered In what townships is Ennis located? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a T 5S, T 6S b T 5S, T 7S c T 6S, T 7S Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 29 HomeworkUnanswered In what Range is the town of Ennis located? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a R 1E b R 2W c R 1W d R 2E Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 30 HomeworkUnanswered Fill in the Blanks Type your answers in all of the blanks and submit – current answer: What creek is present in Sec. 29, T.5 S, R.1 E? – blank1 What creek is present in Sec. 29, T.5 S, R.1 E? blank1 – Word Answer Unanswered Please select an answer to submit Submit Please select an answer to submit UTM Coordinates The Universal Transverse Mercator (UTM) grid is a rectangular grid system that divides the world into 60 north-south zones, each covering a section 6° wide in longitude. Zone 1 is located between 180° and 174°W. Numbering progresses eastward to Zone 60. The contiguous 48 States are part of Zones 10-19. Within each zone, coordinates are measured in meters relative to north and east, called northing (N) and easting (E) measurements. Northing measurements are measured from the equator. To avoid negative numbers in the southern hemisphere, the equator is assigned a value of 10,000,000 meters. On some maps UTM grid lines are shown or evenly-spaced tick marks are visible along the borders of the map. The distance between tick marks is 1,000 m on 7.5- and 15minute quadrangles. Be careful not to confuse these tick marks with the latitudelongitude coordinate system. Portion of the BRYAN EAST QUADRANGLE, TEXAS Questions: UTM Coordinates Lab 10: Question 31 HomeworkUnanswered Using the previous figure, match the corresponding letters locations using UTM Drag and drop options on the right-hand side and submit. For keyboard navigation…SHOW MORE Press space or enter to grab 4654400mN 727700mE • W 4654400mN 727700mE Press space or enter to grab 4656800mN 726200mE • X 4656800mN 726200mE Press space or enter to grab 4655600mN 728300mE • Y 4655600mN 728300mE Unanswered Submit MOCCASIN MESA Map Lab 10: Question 32 HomeworkUnanswered Locate the following features and match them to their correct corresponding full UTM coordinates (to the nearest 100 m) Drag and drop options on the right-hand side and submit. For keyboard navigation…SHOW MORE Press space or enter to grab Northing: 4114809 Easting: 730714 • Moccasin Mesa (near the center of the map) Northing: 4114809 Easting: 730714 Press space or enter to grab Northing: 418428 Easting 727000 • Mancos Canyon (in the southeast corner of the map) Northing: 418428 Easting 727000 Press space or enter to grab Northing: 4120119 Easting: 722833 • The fire station near Cedar tree tower (in the west portion of the map) Northing: 4120119 Easting: 722833 Unanswered Submit Topographic maps use contour lines to represent the elevation of the land surface. This gives the map a third dimension that delineates surface features such as: hills, valleys, streams, lakes, etc. Modified from Topographic Maps, 1978, Steger, Theodore D., U.S. Geological Survey. Understanding contour lines on topographic maps requires applying the following practices and rules. It is necessary to follow these rules when drawing or reading contour lines on topographic maps. Rules to Follow When Drawing or Reading Contour Lines https://youtu.be/CCPmcuoLkpU All points on a contour line have the same elevation. Contour lines separate points of higher elevation from points of lower elevation. The difference in elevation between adjacent contour lines is the contour interval. Contour line elevations are always multiples of the contour interval. An index contour has heavier printing for ease of identification. Index contours appear at regular intervals, such as every fifth or sometimes every fourth contour line (depending on the contour interval). Contour lines do not branch or cross one another. Contour lines can merge to form a single line only where there is a vertical cliff. Contour lines always close to form an irregular circle. If they do not close within the map boundary, they end at the edge of the map. Spacing of contour lines indicates gentleness or steepness of a slope. A steep slope is represented by closely spaced contours, while a gentle slope is represented by wide spacing of contour lines. Hills are represented by lines that close within map limits. Depressions are represented by closed hachured contours. Hachure marks point into the depressions. When crossing a stream, contour lines form a V that points upstream (uphill). When crossing a hill, the last contour line crossed before reaching the top is the first one crossed when descending the other side (the same is true for a valley). You must repeat elevations in order to report a reversal of slope. For the next 3 questions, please refer to the image below: Lab 10: Question 33 HomeworkUnanswered What is the contour interval on this map? Refer to the image above. _________________ feet Type your numeric answer and submit Numeric Answer – Type your numeric answer and submit Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 34 HomeworkUnanswered What is the elevation of contour line x? Refer to the image above. _________________ feet Type your numeric answer and submit Numeric Answer – Type your numeric answer and submit Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 35 HomeworkUnanswered Fill in the Blanks Type your answers in all of the blanks and submit – current answer: In what type of feature has Frog Pond formed? Refer to the image above. – blank1 In what type of feature has Frog Pond formed? Refer to the image above. blank1 – Word Answer Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 36 HomeworkUnanswered Which trail has a steeper slope? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Canyon Trail b Forest Trail Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 37 HomeworkUnanswered Click on the map at the highest elevation Targets placed: 0/3 Undo Delete selected Remove All You can place up to 3 targets Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 38 HomeworkUnanswered Click on that map at the lowest elevation Targets placed: 0/2 Undo Delete selected Remove All You can place up to 2 targets Unanswered Please select an answer to submit Submit Please select an answer to submit https://youtu.be/RNLXXHA8iBE For the next 3 questions, please refer to the image below: Lab 10: Question 39 HomeworkUnanswered What direction is the stream flowing? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a NE b NW c SE d SW Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 40 HomeworkUnanswered Assume that the contour lines have an interval of 50 feet. Click in the blank spot on the contour line that should be labeled 300 Targets placed: 0/2 Undo Delete selected Remove All You can place up to 2 targets Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 41 HomeworkUnanswered Assume that the contour lines have an interval of 50 feet. Click in the blank spot on the contour line that should be labeled 400 Targets placed: 0/2 Undo Delete selected Remove All You can place up to 2 targets Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 42 HomeworkUnanswered What is a possible elevation for A? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 425 b 250 c 350 d 325 Unanswered Please select an answer to submit Submit Please select an answer to submit For the next 4 questions, please refer to the image below: Lab 10: Question 43 HomeworkUnanswered What is the difference in elevation between the labeled index contours (the heavier lines)? _________________ feet Type your numeric answer and submit Numeric Answer – Type your numeric answer and submit Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 44 HomeworkUnanswered What is the elevation of the third index contour in the SE corner of the map? _________________ feet Type your numeric answer and submit Numeric Answer – Type your numeric answer and submit Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 45 HomeworkUnanswered What is the contour interval? Refer to the image above. _________________ feet Type your numeric answer and submit Numeric Answer – Type your numeric answer and submit Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 46 HomeworkUnanswered What is a possible elevation for X? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 3750 b 3600 c 3700 d 3650 Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 47 HomeworkUnanswered Assume a 5 feet contour interval. Click on the blank area of the correct contour line that represents 680 ft. Targets placed: 0/2 Undo Delete selected Remove All You can place up to 2 targets Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 48 HomeworkUnanswered What is a possible elevation for A? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 688 feet b 677 feet c 673 d 682 Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 49 HomeworkUnanswered Assume a C.I. of 20 feet. Click on the blank area of the contour line that represents 400 feet Targets placed: 0/2 Undo Delete selected Remove All You can place up to 2 targets Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 50 HomeworkUnanswered Assume a contour line 0f 20 ft. What is a good estimate for the elevation of C? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 480 b 490 c 380 d 390 Unanswered Please select an answer to submit Submit Please select an answer to submit For the next 2 questions, please refer to the image below: C.I. = 10 Lab 10: Question 51 HomeworkUnanswered What is a possible elevation for A? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 85 ft b 75 ft c 90 ft d 70 ft Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 52 HomeworkUnanswered What is a possible elevation for letter B? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 35 ft b 45 ft c 55 ft d 65 ft Unanswered Please select an answer to submit Submit Please select an answer to submit Lab 10: Question 53 HomeworkUnanswered What direction is the stream flow for the map above? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a NW b SW c NE d SE Unanswered Please select an answer to submit Submit Please select an answer to submit Directions On How to Construct a Topographic Profile A topographic profile is a cross-section (side view) constructed along a chosen line on a topographic map. The profile view reveals surface features such as hills and valleys. The steps below explain how to construct a topographic profile along line AB Step 1. Place a strip of scrap paper along the line of the profile. Mark the end points of the profile (A and B). Where contour lines cross the profile line, draw a small line on the strip of scrap paper and label the elevation. (Streams and other features can also be noted on the paper). Step 2. Lay the paper strip along the bottom of a graph. Transfer the marked elevations to the graph. Connect the points with a smooth curve. https://youtu.be/B6Suq_41ysg Vertical Exaggeration Notice that the vertical scale on the profile and the horizontal scale on the map are different. Vertical scale: 100 feet Horizontal scale: 5000 feet This exaggerates the relief (brings out the differences between high and low elevations): The vertical scale is the contour interval while the horizontal scale is the map scale. The amount of vertical exaggeration is calculated by the following formula: \text{Vertical Exaggeration =}\frac{\text{Horizontal Scale}}{\overline{\text{Vertical Scale}}}Vertical Exaggeration =Vertical ScaleHorizontal Scale Using the contour interval in Part A Lab 10: Question 54 HomeworkUnanswered What is the vertical exaggeration of this topographic profile? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 500 b 50 c 1000 d 10 Unanswered Please select an answer to submit Submit Please select an answer to submit For the next question, please refer to the image below: Lab 10: Question 54 HomeworkUnanswered What is the vertical exaggeration of this topographic profile? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 500 b 50 c 1000 d 10 Unanswered Please select an answer to submit Submit Please select an answer to submit

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