Add elevation difference to tap drawer

lmfalconer

October 13, 2024 09:11

Show the difference in elevation from the current location to a point on the map alongside the distance to that point in the tap drawer

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• 

  celiaruby127

  October 16, 2024 03:49 Edited

  Access Current Location:
  Use the GPS functionality to obtain the user’s current location (latitude and longitude).
  Capture Target Point:
  When a user taps on the map, capture the coordinates of the tapped point.
  Fetch Elevation Data:
  Utilize an elevation API (e.g., Google Maps Elevation API, OpenElevation, etc.) to retrieve the elevation of both the current location and the target point.
  async function getElevation(lat, lon) {
      const response = await fetch(`https://api.elevationapi.com/api/Elevation?lat=${lat}&lon=${lon}`); slope game
      const data = await response.json();
      return data.elevation; // Adjust according to the API response structure
  }
  Calculate Distance:
  Use the Haversine formula or existing methods in Gaia GPS to calculate the distance between the two points.
  function calculateDistance(lat1, lon1, lat2, lon2) {
      const R = 6371; // Radius of Earth in km
      const dLat = (lat2 - lat1) * (Math.PI / 180);
      const dLon = (lon2 - lon1) * (Math.PI / 180);
      const a =
          Math.sin(dLat / 2) * Math.sin(dLat / 2) +
          Math.cos(lat1 * (Math.PI / 180)) * Math.cos(lat2 * (Math.PI / 180)) *
          Math.sin(dLon / 2) * Math.sin(dLon / 2);
      const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
      return R * c; // Distance in km
  }
  Update Tap Drawer:
  Modify the tap drawer to display the distance and elevation difference.
  async function updateTapDrawer(currentLocation, targetLocation) {
      const currentElevation = await getElevation(currentLocation.lat, currentLocation.lon);
      const targetElevation = await getElevation(targetLocation.lat, targetLocation.lon);
      const distance = calculateDistance(currentLocation.lat, currentLocation.lon, targetLocation.lat, targetLocation.lon);
      const elevationDifference = targetElevation - currentElevation;

      // Update the tap drawer content
      const drawerContent = `
          <p>Distance: ${distance.toFixed(2)} km</p>
          <p>Elevation Difference: ${elevationDifference} meters</p>
      `;
      document.getElementById('tapDrawer').innerHTML = drawerContent; // Adjust according to your HTML structure
  }

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• 

  myandrea268

  December 31, 2024 04:49

  you need to calculate the tap difference
  | Distance (m) | Height difference (m) | slope game
  |------------------|-----------------------|
  | 0 | 0 |
  | 10 | +2 |
  | 20 | +4 |
  | 30 | +3 |

  then use a chart or table to display the height difference and distance information.

  0

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