Semi-official

Autoware extensions and mapping tools that are widely used with Lanelet2 in the stack.

Autoware OSM tags, MGRS / Transverse Mercator projection, traffic lights, right-of-way, and Python utilities on top of Lanelet2.

Official Autoware tutorial for building Lanelet2 maps with TIER IV Vector Map Builder — also points to JOSM and MapToolbox as alternatives.

Browser-based editor for Autoware Lanelet2 maps (.osm). No local install; a TIER IV account is required.

Unity plugin from Autocore for creating Autoware Lanelet2 maps from PCD — lanelets, traffic lights, stop lines, and OSM export.