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Fix elevation gain inflation from device no-fix leading zeros

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Apple Watch and similar devices record exactly 0.0 for elevation while
waiting for barometric/GPS lock, then jump to the real altitude. The
hysteresis accumulator was seeding from 0.0, counting the full jump as
ascent. Fix: detect a leading near-zero run followed by a large jump
and seed the accumulator from the first real value instead.

Applied in both _elevation() (fresh extractions) and
recalculate_elevation_hysteresis() (recompute path). Added a bulk
admin endpoint POST /api/admin/users/{handle}/recompute-elevation and
corresponding button to fix existing stored activities.
This commit is contained in:
Davide Scaini
2026-05-10 16:21:24 +02:00
parent 55d59112ad
commit 8f028101c7
4 changed files with 106 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
site/src/pages/admin/index.astro
+31
View File
@@ -174,6 +174,11 @@ import Base from '../../layouts/Base.astro';
data-handle="${u.handle}"
title="Re-run merge_all and trigger a site rebuild"
>Rebuild</button>
<button
class="recompute-elev-btn text-xs px-3 py-1.5 rounded-lg bg-zinc-800 hover:bg-zinc-700 text-zinc-400 hover:text-zinc-200 transition-colors"
data-handle="${u.handle}"
title="Recompute elevation gain/loss from stored timeseries (fixes leading-zero no-fix artefacts)"
>Recompute elev.</button>
<button
class="pwreset-btn text-xs px-3 py-1.5 rounded-lg bg-zinc-800 hover:bg-zinc-700 text-zinc-400 hover:text-zinc-200 transition-colors"
data-handle="${u.handle}"
@@ -336,6 +341,32 @@ import Base from '../../layouts/Base.astro';
});
});
tbodyEl.querySelectorAll<HTMLButtonElement>('.recompute-elev-btn').forEach(btn => {
btn.addEventListener('click', async () => {
const h = btn.dataset.handle!;
btn.disabled = true;
btn.textContent = 'Running…';
try {
const r = await fetch(`/api/admin/users/${h}/recompute-elevation`, {
method: 'POST', credentials: 'include',
});
const d = await r.json();
if (r.ok) {
btn.textContent = `Done (${d.patched} patched)`;
btn.classList.add('text-green-400');
} else {
btn.textContent = 'Error: ' + (d.detail ?? r.status);
btn.classList.add('text-red-400');
btn.disabled = false;
}
} catch {
btn.textContent = 'Error';
btn.classList.add('text-red-400');
btn.disabled = false;
}
});
});
tbodyEl.querySelectorAll<HTMLButtonElement>('.pwreset-btn').forEach(btn => {
btn.addEventListener('click', async () => {
const h = btn.dataset.handle!;