Start, end, and every section marker must be a frame you could still recognize after the season changes. Prefer trees, stumps, rocks, signs, or other distinctive shapes — not a generic green corridor that only exists in summer.
Good
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Twin trunks with bark you can spot in any season
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Root wobble and trees — fixed shapes, not just ground cover
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Pale split trunks framing the trail stay visible leafless
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Large leaning trunk — still obvious without leaves
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Parallel trunks — a corridor you can find in any season
Bad
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Leaf-strewn trail with no fixed landmark
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Lush summer green — looks completely different in winter
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Dense green undergrowth — gone in winter
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Same corner in another season — hard to match reliably
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Blurry green tunnel — no sharp landmark to lock onto
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Summer-only green corridor — nothing permanent in frame
Borderline
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Trail-side tree helps, but most of the frame is seasonal green
If it would disappear without leaves, don’t mark it.
After upload, Premium/Pro users can trigger TaawnEngine segment reconstruction from segment detail (requires calibrated camera). This builds a 3D model used for overlays and run alignment.
See Segment detail for a full walkthrough of the detail screen.