what is the measure of the angle of elevation from point l to point j?

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Whether you're traveling or working on a landscaping projection, it can be useful to know your tiptop. If you're looking for an exact number, use an altimeter, computer, or smartphone to calculate your current position above bounding main level. If you're trying to find a deviation in elevation betwixt two points of state, utilize tie a length of cord between two posts and employ a level to decide the difference.

1. 1

   Figure out your exact location with a navigational app. Open the Google Maps app on your smartphone or become the website on your calculator. If you're on a mobile device, tap and hold on a certain point of the map to testify your current position in latitude and longitude. If you lot're on a reckoner, right-click on the map to access your coordinates. Write these numbers down on a piece of paper, as they'll come in handy later.^[1]

   • To make things easier, feel complimentary to copy and paste your coordinates.

2. 2

   Enter your coordinates into an online tiptop calculator. Search online to detect an online resources, like FreeMapTools. Use the dialogue box on the website to input your previous coordinates. After you've typed or copied the numbers into the search box, striking the enter push on your device. Bank check the webpage to see if your elevation measurement has appeared.^[2]

   • Many of these maps can decide your elevation by your address alone.^[3]
   • If the website doesn't load correctly, try refreshing the page.

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3. 3

   Encounter if your top is above or below bounding main level. Look over your measurement to meet how elevated y'all are. If the number is positive, then your location is that many feet or meters above bounding main level. If your measurement is negative, then y'all're that amount of feet/meters below sea level.^[4]

   • Someone who lives almost the mountains will be at a much higher elevation than someone who lives on the coast.

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1. 1

   Endeavour to discover ii-3 benchmarks in the area. Look around the plot of land to search for benchmarks, or objects that have a consistent elevation. Since the elevation of sure objects (e.one thousand., trees, bushes) can change over time, effort to choose a sturdy, unmoving object as a benchmark. If you're working well-nigh a span or nearby building, try to determine the elevation of those locations past looking at a past land survey.^[v]

   • For example, if yous're measuring the pinnacle between ii different points in your yard, try using the elevation of your house as a benchmark.

2. 2

   Prepare up ii metal posts betwixt 2 dissimilar points on the land. Choose ii different points in the land that you desire to mensurate, and mark them in place with a stick or other sharp tool. Next, take ii metallic posts and insert them into the marked areas of soil. Follow the manufacturer'south instructions when yous install the posts, and bank check to run into if you need to dig any post holes ahead of time.^[6]

   • Although metallic posts are more than sturdy, y'all can likewise use wooden posts.
   • Make sure that the posts are even in acme after you place them in the basis.

3. 3

   Necktie a string betwixt the two posts to determine the slope. Take the cease of a string and tie it securely around the postal service. Unspool the string every bit you go on along until you reach the second mail. Snip off the string and tie it to the second mail service. When you do this, make sure that the string is as taut and straight equally possible.^[seven]

   • Endeavor using a durable string or cord for this.
   • Be certain to note the full length between the 2 posts.

4. 4

   Measure the pinnacle of the posts with a measuring tape. Place the bottom of a measuring record at the pes of the metal mail service. Kickoff where the post enters the ground, and stretch the tape to reach the top of the post. Write down or memorize this measurement, equally it will come up in handy later.^[8]

   • At this point, brand sure that both posts are the same peak. If either mail service is taller or shorter than the other, make adjustments as necessary.

5. 5

   Hold a level in place beneath the heart point of the cord. Walk to the approximate center bespeak of the string to continue your measurements. Identify a iv feet (one.2 m) level below the centre of the cord. To keep one side of the level snugly in identify while you measure, gear up a pile of stones a stack of bricks beneath the cord.^[9]

   • If you don't accept a 4 feet (1.two one thousand) level on mitt, use a different size. Any level you utilise, make certain you lot know what its length is for futurity calculations.
   • A stack of bricks likewise piece of work well to secure 1 side of the level.

6. half-dozen

   Adjust the other side of the level until it's centered. Commencement shifting the bubble portion of the level one time the far side is secured into place. Motility the level slowly until it reads a level measurement. Equally you practise this, keep in listen that the level probably won't be parallel to the string yous've set up. Proceed to cheque that the other side of the level is secure, as you'll demand both hands available for the adjacent step.^[10]

7. 7

   Measure out the distance betwixt the unsecured end of the level and the string. Employ the tape measure to calculate the distance between the end of the level and the string. Depending on your land, this distance could be several inches or centimeters. Accept notation of this number, equally it y'all'll need it to summate the elevation difference.^[11]

   • If you're not a fan of math, have a small-scale notebook and a calculator on hand so you can keep track of your various measurements.

8. viii

   Utilize the length of both your string and level to summate the departure in elevation between your posts. Have the full length of your cord and divide information technology past the length of your level. Since this number equals the total departure in elevation from each post, multiply this number by the calculated altitude between the string and level. If you're using the Majestic measurement system, divide this number by 12 to view the results in feet. If you're using the metric system, adjust the decimal betoken accordingly.^[12]

   • For example, if the distance between your posts is 132 inches (340 cm), divide that length by your the length of your 4 ft (120 cm) level to get a total of 33 in (84 cm). If the distance between your posts is 2 in (5.1 cm), multiply 33 in (84 cm) past 2 in (v.i cm), which gives you a total of 66 in (170 cm). That number would be your total top change, in inches/centimeters.

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Things You'll Need

• Computer
• Smartphone

• 2 metal posts
• Scroll of string
• Level
• Tape mensurate
• Reckoner

• Invest in an altimeter to get an verbal reading of your current elevation. While this technology is nearly ordinarily used in planes, there are also portable versions of the device that aid with activities like skydiving. If you don't want to spend a lot of money, consider downloading an altimeter app for your phone or purchasing a watch with a built-in altimeter.^[thirteen]

• If you don't mind doing a little math, you can make up one's mind a mountain'due south rough superlative while hiking. Additionally, you can plug a barometer reading into a specific formula to go a sense of your elevation on-the-get.^[14]

• If you want to survey an entire plot of land, consider hiring a professional person team to exercise the job.

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• Watch out for altitude sickness whenever y'all travel to a place with a higher elevation.^[15]

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