Who's this data from?
Bait stations
Readings
Only readings with a bearing get drawn as a line. A row with no time entered still gets a line, just drawn to a default 250m in yellow rather than the usual light blue, labelled with the bearing and a note that no time was given. A row with no bearing at all can't be drawn — there's nothing to point the line at — so it's left out of the map, though it's still counted in the export summary.