Hi,
You can create RoadRunner HD Map (.rrhd) files using either MATLAB or C++. MATLAB provides the roadrunnerHDMap API, which allows you to build lanes, lane boundaries, and other map elements and export them directly to .rrhd format. C++ can generate the same .rrhd files by using the official RoadRunner HD Map protobuf schema files, such as hd_lanes.proto and geometry.proto, which are available within the Scene Builder protocol buffer definitions.
For lane and lane‑boundary curves, RoadRunner HD Map represents geometry as a polyline, meaning you define the curve by supplying multiple (x, y) or (x, y, z) coordinate points in the Geometry fields of the Lane or LaneBoundary objects.
Please refer to the following URLs, which include examples that help/guide your implementation:
