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Moar federation

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Tim Zöller 2025-12-03 21:34:21 +01:00
parent f4edfeb4b7
commit a0d6518cd3
1 changed files with 71 additions and 1 deletions
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72
src/main/resources/templates/activities/detail.html
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@ -434,10 +434,80 @@
}
if (elevationData.length > 0) {
FitPub.createElevationChart('elevationChart', elevationData);
// Smooth elevation data to remove zero/invalid values
const smoothedData = smoothElevationData(elevationData);
FitPub.createElevationChart('elevationChart', smoothedData);
}
}
/**
* Smooth elevation data by interpolating zero/invalid values and applying moving average
* @param {Array} data - Array of {distance, elevation} objects
* @returns {Array} Smoothed elevation data
*/
function smoothElevationData(data) {
if (data.length === 0) return data;
// Step 1: Replace zeros and invalid values with interpolated values
const interpolated = [...data];
for (let i = 0; i < interpolated.length; i++) {
if (interpolated[i].elevation === 0 || interpolated[i].elevation == null) {
// Find previous valid value
let prevIndex = i - 1;
while (prevIndex >= 0 && (interpolated[prevIndex].elevation === 0 || interpolated[prevIndex].elevation == null)) {
prevIndex--;
}
// Find next valid value
let nextIndex = i + 1;
while (nextIndex < interpolated.length && (interpolated[nextIndex].elevation === 0 || interpolated[nextIndex].elevation == null)) {
nextIndex++;
}
// Interpolate between valid values
if (prevIndex >= 0 && nextIndex < interpolated.length) {
const prevElevation = interpolated[prevIndex].elevation;
const nextElevation = interpolated[nextIndex].elevation;
const ratio = (i - prevIndex) / (nextIndex - prevIndex);
interpolated[i].elevation = prevElevation + (nextElevation - prevElevation) * ratio;
} else if (prevIndex >= 0) {
// Use previous value if no next value available
interpolated[i].elevation = interpolated[prevIndex].elevation;
} else if (nextIndex < interpolated.length) {
// Use next value if no previous value available
interpolated[i].elevation = interpolated[nextIndex].elevation;
}
}
}
// Step 2: Apply moving average smoothing (window size 5)
const windowSize = 5;
const smoothed = [];
for (let i = 0; i < interpolated.length; i++) {
const start = Math.max(0, i - Math.floor(windowSize / 2));
const end = Math.min(interpolated.length, i + Math.ceil(windowSize / 2));
let sum = 0;
let count = 0;
for (let j = start; j < end; j++) {
if (interpolated[j].elevation != null && interpolated[j].elevation !== 0) {
sum += interpolated[j].elevation;
count++;
}
}
smoothed.push({
distance: interpolated[i].distance,
elevation: count > 0 ? sum / count : interpolated[i].elevation
});
}
return smoothed;
}
// Haversine formula to calculate distance between two GPS points
function calculateDistance(lat1, lon1, lat2, lon2) {
const R = 6371000; // Earth's radius in meters