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docs: clarify trail line should connect all points regardless of distance

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- Continuous path connection for long-distance travel
- No distance-based filtering or gap detection
- Important for aircraft, vehicles, intermittent coverage scenarios
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Graham McIntire 2026-02-27 12:55:37 -06:00
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docs/plans/2026-02-27-callsign-trail-line-design.md
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@ -106,6 +106,15 @@ Implement a trail line visualization that displays when tracking a specific call
## Implementation Notes
### Continuous Path Connection
- **Connect all points regardless of distance**: The trail line should connect all position points in chronological order, even if there are large gaps between positions
- This is important for tracking stations that:
- Travel long distances (aircraft, vehicles on highways)
- Have intermittent coverage (gaps in digipeater/igate range)
- Cross large geographic areas
- Do NOT apply distance-based filtering or gap detection
- The continuous line shows the complete journey path for the tracked callsign
### Time Threshold Handling
- Use existing `socket.assigns.packet_age_threshold` for filtering
- Trail line respects the "Trail Duration" setting (1 hour, 6 hours, etc.)
@ -122,6 +131,8 @@ Implement a trail line visualization that displays when tracking a specific call
- Single point: Don't draw line (show marker instead)
- Zoom threshold crossing: Smoothly transition between trail and markers
- Callsign tracking cleared: Remove trail line immediately
- **International date line crossing**: Trail line should wrap correctly around the date line (Leaflet handles this automatically with proper coordinate ordering)
- **Large distance gaps**: Continue drawing line even with large geographic gaps between consecutive points
## Testing Strategy