/usr/include/mrpt/maps/ is in libmrpt-dev 1:1.5.5-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/mrpt/maps/include/
/usr/include/mrpt/maps/include/mrpt/
/usr/include/mrpt/maps/include/mrpt/maps/
/usr/include/mrpt/maps/include/mrpt/maps.h
/usr/include/mrpt/maps/include/mrpt/maps/CBeacon.h
/usr/include/mrpt/maps/include/mrpt/maps/CBeaconMap.h
/usr/include/mrpt/maps/include/mrpt/maps/CColouredOctoMap.h
/usr/include/mrpt/maps/include/mrpt/maps/CColouredPointsMap.h
/usr/include/mrpt/maps/include/mrpt/maps/CGasConcentrationGridMap2D.h
/usr/include/mrpt/maps/include/mrpt/maps/CHeightGridMap2D.h
/usr/include/mrpt/maps/include/mrpt/maps/CHeightGridMap2D_Base.h
/usr/include/mrpt/maps/include/mrpt/maps/CHeightGridMap2D_MRF.h
/usr/include/mrpt/maps/include/mrpt/maps/CLogOddsGridMap2D.h
/usr/include/mrpt/maps/include/mrpt/maps/COccupancyGridMap2D.h
/usr/include/mrpt/maps/include/mrpt/maps/COctoMap.h
/usr/include/mrpt/maps/include/mrpt/maps/COctoMapBase.h
/usr/include/mrpt/maps/include/mrpt/maps/CPointCloudFilterBase.h
/usr/include/mrpt/maps/include/mrpt/maps/CPointCloudFilterByDistance.h
/usr/include/mrpt/maps/include/mrpt/maps/CPointsMap.h
/usr/include/mrpt/maps/include/mrpt/maps/CPointsMap_liblas.h
/usr/include/mrpt/maps/include/mrpt/maps/CRandomFieldGridMap2D.h
/usr/include/mrpt/maps/include/mrpt/maps/CRandomFieldGridMap3D.h
/usr/include/mrpt/maps/include/mrpt/maps/CReflectivityGridMap2D.h
/usr/include/mrpt/maps/include/mrpt/maps/CSimplePointsMap.h
/usr/include/mrpt/maps/include/mrpt/maps/CWeightedPointsMap.h
/usr/include/mrpt/maps/include/mrpt/maps/CWirelessPowerGridMap2D.h
/usr/include/mrpt/maps/include/mrpt/maps/PCL_adapters.h
/usr/include/mrpt/maps/include/mrpt/maps/link_pragmas.h
/usr/include/mrpt/maps/include/mrpt/opengl/
/usr/include/mrpt/maps/include/mrpt/opengl/CAngularObservationMesh.h
/usr/include/mrpt/maps/include/mrpt/opengl/CPlanarLaserScan.h
/usr/include/mrpt/maps/include/mrpt/slam/
/usr/include/mrpt/maps/include/mrpt/slam/CBeacon.h
/usr/include/mrpt/maps/include/mrpt/slam/CBeaconMap.h
/usr/include/mrpt/maps/include/mrpt/slam/CColouredOctoMap.h
/usr/include/mrpt/maps/include/mrpt/slam/CColouredPointsMap.h
/usr/include/mrpt/maps/include/mrpt/slam/CGasConcentrationGridMap2D.h
/usr/include/mrpt/maps/include/mrpt/slam/CHeightGridMap2D.h
/usr/include/mrpt/maps/include/mrpt/slam/CLogOddsGridMap2D.h
/usr/include/mrpt/maps/include/mrpt/slam/COccupancyGridMap2D.h
/usr/include/mrpt/maps/include/mrpt/slam/COctoMap.h
/usr/include/mrpt/maps/include/mrpt/slam/COctoMapBase.h
/usr/include/mrpt/maps/include/mrpt/slam/CPointsMap.h
/usr/include/mrpt/maps/include/mrpt/slam/CRandomFieldGridMap2D.h
/usr/include/mrpt/maps/include/mrpt/slam/CReflectivityGridMap2D.h
/usr/include/mrpt/maps/include/mrpt/slam/CSimplePointsMap.h
/usr/include/mrpt/maps/include/mrpt/slam/CWeightedPointsMap.h
/usr/include/mrpt/maps/include/mrpt/slam/CWirelessPowerGridMap2D.h
/usr/include/mrpt/maps/include/mrpt/slam/PCL_adapters.h