review doc attachment and answer all 3 questions
The “Geography I ES 1101 Lab 2: Topography at the South Mountain Reservation This lab exercise is designed to familiarize you with the perception of topography in a low relief area in New Jersey. As we will be discussing down the road in the semester, topography plays an important role in many elements in the earth system, including water drainage and flooding, soil erosion and retention, micro-climates, and local vegetation. We will be exploring the topography of the South Mountain Reservation with this lab, assisted by a free smartphone App and through field explorations. Preparation: Last week we used a USGS 7.5 minute topographic quadrangle to learn how to interpret contour lines. This week we will visualize contours and navigate in the South Mountain reservation using a smartphone App called AllTrails. 1. Go to your phone’s App store and search for “AllTrails”. 2. Install the free version. 3. Start the App and familiarize yourself with it by tapping “Explore” at the bottom left of the screen. It will show you with some trails nearby your current location. 4. Choose any trail to tap and read more about. On the screen where it shows the trail map, you can tap to “View Full Map”. 5. This opens a digital topographic map. Use it to review the concepts we learned last week, try to visualize the terrain around, estimate slope aspect and steepness, etc. Question 1: Locate the scale bar near the bottom of the map (above the cross-section). What type of scale is this (representative fraction or graphic or written scale)? Question 2: Zoom in and out on the map using two fingers while paying attention to the scale. Notice how the scale changes. Why does the scale change? Question3: Now use your finger to move along the cross-section and see how the blue dot moves along the trail. A textbox appears next to your finger listing “distance”, “elevation”, and “grade”. Recall the several concepts we learned reading the topographic map last week, what do you think this “grade” measures. Field Trip: We meet at 9:30am at the Locust Grove Parking Lot (Millburn, NJ). Getting there by car: You can locate the destination by searching for “Locust Grove Parking Lot” on Google Map. The closet public parking is the parking lot in front of Millburn Free Public Library in case the parking lot at Locust Grove is full. Getting there by train: The nearest train station is Millburn train station on the Morris & Essex line. We will first go over the AllTrails App you installed (ahead of time) at the parking lot, preview the environment we will be in and go over safety considerations. We will start hiking from the parking lot trailhead around 9:45. 1. Follow the group closely during the field trip and listen to instructions along the way. 2. With what you learned during the trip and from last week, answer the rest of the questions. 3. Check for ticks after the field trip. 4. Type your answers in this document and submit via Blackboard before next lab. Question 4: Locate the two labeled index contours on the trail map using AllTrails. What are their elevations? (Note: if you did not record the values during the field trip, you can re-load your recorded track by starting AllTrails and go to History. If you did not save your track successfully, you may search for the trail named “Sunset, Rahway, River, Pingry, Lenape short Loop”. This is not the exact trail we walked but closeby.). Question 5: What is the contour interval? (Hint: calculate using the above two elevation values. Note every fifth contour is an index contour) Question 6: What is the elevation of Washington Rock calculated using the contour interval? What is the elevation at the trail head? Are they different from what you measured using your phone in the field (you might have screenshots)? Question 7: What is the slope aspect at Washington Rock using the estimation method we learned from last week? If you took a screenshot of your phone’s compass display at the spot, you can insert it here, too. Does it confirm your estimation? Question 8: What is the slope steepness from Washington Rock to Locust Grove Parking Lot using the method we learned from last week? Question 9: What is the steepest slope grade you hiked today (find on the cross-section on the AllTrails App of your saved track). Is it steeper or mellower than the number you got for Question 8? Why? Question 10: So AllTrails can automatically track your whereabouts using your phone’s GPS receiver (we talked about how the GPS receiver works in our class a couple of weeks ago). It then locates you on its built-in topographic map. It can quickly generate a cross-section of every trail or your own recorded trail. Briefly describe how it does it. The “Geography I ES 1101 Lab 2: Topography at the South Mountain Reservation This lab exercise is designed to familiarize you with the perception of topography in a low relief area in New Jersey. As we will be discussing down the road in the semester, topography plays an important role in many elements in the earth system, including water drainage and flooding, soil erosion and retention, micro-climates, and local vegetation. We will be exploring the topography of the South Mountain Reservation with this lab, assisted by a free smartphone App and through field explorations. Preparation: Last week we used a USGS 7.5 minute topographic quadrangle to learn how to interpret contour lines. This week we will visualize contours and navigate in the South Mountain reservation using a smartphone App called AllTrails. 1. Go to your phone’s App store and search for “AllTrails”. 2. Install the free version. 3. Start the App and familiarize yourself with it by tapping “Explore” at the bottom left of the screen. It will show you with some trails nearby your current location. 4. Choose any trail to tap and read more about. On the screen where it shows the trail map, you can tap to “View Full Map”. 5. This opens a digital topographic map. Use it to review the concepts we learned last week, try to visualize the terrain around, estimate slope aspect and steepness, etc. Question 1: Locate the scale bar near the bottom of the map (above the cross-section). What type of scale is this (representative fraction or graphic or written scale)? Question 2: Zoom in and out on the map using two fingers while paying attention to the scale. Notice how the scale changes. Why does the scale change? Question3: Now use your finger to move along the cross-section and see how the blue dot moves along the trail. A textbox appears next to your finger listing “distance”, “elevation”, and “grade”. Recall the several concepts we learned reading the topographic map last week, what do you think this “grade” measures. Question 4: Locate the two labeled index contours on the trail map using AllTrails. What are their elevations? (Note: if you did not record the values during the field trip, you can re-load your recorded track by starting AllTrails and go to History. If you did not save your track successfully, you may search for the trail named “Sunset, Rahway, River, Pingry, Lenape short Loop”. This is not the exact trail we walked but closeby.). Question 5: What is the contour interval? (Hint: calculate using the above two elevation values. Note every fifth contour is an index contour) Question 6: What is the elevation of Washington Rock calculated using the contour interval? What is the elevation at the trail head? Are they different from what you measured using your phone in the field (you might have screenshots)? Question 7: What is the slope aspect at Washington Rock using the estimation method we learned from last week? If you took a screenshot of your phone’s compass display at the spot, you can insert it here, too. Does it confirm your estimation? Question 8: What is the slope steepness from Washington Rock to Locust Grove Parking Lot using the method we learned from last week? Question 9: What is the steepest slope grade you hiked today (find on the cross-section on the AllTrails App of your saved track). Is it steeper or mellower than the number you got for Question 8? Why? Question 10: So AllTrails can automatically track your whereabouts using your phone’s GPS receiver (we talked about how the GPS receiver works in our class a couple of weeks ago). It then locates you on its built-in topographic map. It can quickly generate a cross-section of every trail or your own recorded trail. Briefly describe how it does it.