GeoLeaf layer id of the derived endpoint sub-layer.
Start and end markers share ONE layer — and therefore one MapLibre source. They
used to be two (gl-route-<id>-start / -end), which meant two sources and two
sub-layers per itinerary where one of each suffices (R.38, backlog résiduel S5).
The merge is possible because deriveEndpoints() already tags every derived
feature with properties.role, so the two visual styles are expressible as
data-driven styleRules on a single layer rather than as two layers.
GeoLeaf layer id of the derived endpoint sub-layer.
Start and end markers share ONE layer — and therefore one MapLibre source. They used to be two (
gl-route-<id>-start/-end), which meant two sources and two sub-layers per itinerary where one of each suffices (R.38, backlog résiduel S5). The merge is possible becausederiveEndpoints()already tags every derived feature withproperties.role, so the two visual styles are expressible as data-drivenstyleRuleson a single layer rather than as two layers.