OptionaldefaultStart collapsed to a round 📈 button (expand on click; the header's ▢ re-collapses). Every other widget in the SDK has this; these two did not, so a corner shared with them could not be tidied. Default false.
OptionalsamplesStation count sampled along the drawn line (default 256, clamped [16, 2048]).
Optionalsurface3D layers whose surfaces (buildings, integrated mesh) are sampled along the line and
drawn as a SECOND, feature-colored chart line above the ground line (any layer exposing
sampleSurfaceHeights, e.g. the mesh layers). Omitted → terrain-only profile.
OptionalunitsUnit system for the chart labels + stats (default 'metric').
Configuration for ElevationProfileWidget. All fields optional.