pointcloud is an extension for storing point cloud data (LIDAR) into postgresql Activate the pointcloud extension: CREATE EXTENSION pointcloud

The pointcloud_postgis extension adds functions that allow you to use PostgreSQL Pointcloud with PostGIS, converting PcPoint and PcPatch to Geometry and doing spatial filtering on point cloud data. The pointcloud_postgis extension depends on both the postgis and pointcloud extensions, so they must be installed first:

CREATE EXTENSION postgis;
CREATE EXTENSION pointcloud;
CREATE EXTENSION pointcloud_postgis;