Overview
This document describes the LIS ALS Classification Plugin, which is designed to classify point cloud data into ground, building, and vegetation points. It integrates seamlessly with the RiPROCESS data processing software, eliminating the need for data export and tiling for third-party classification.

Data Preparation
The plugin can process the entire project data, specific flight strips, or user-defined regions of interest. It performs on-the-fly data tiling with overlap, and the classification results are written back to the data records without overlap. The classification identifiers adhere to the ASPRS LAS standard.

Ground Classifier
The ground classifier uses progressive TIN densification to distinguish between ground and non-ground points. It offers default settings for flat, sloped, and steep terrains, which can be adjusted. The classifier also calculates the height above ground for each point, storing it as an additional attribute for further analysis.

Vegetation & Building Classifier
This classifier separates non-ground points into building, vegetation, and undefined classes. Buildings are identified through point cloud segmentation and local point neighborhood analysis. Additional filters help remove vegetation from building roofs and facades. Vegetation points are filtered by local point density and categorized into low, medium, and high vegetation.

ASPRS LAS Class Codes
The document lists the ASPRS LAS class codes used: 1 for unclassified, 2 for ground, 3 for low vegetation, 4 for medium vegetation, 5 for high vegetation, and 6 for buildings.

Legal Notice
The document is copyrighted by RIEGL Laser Measurement Systems GmbH, and any use beyond personal purposes requires written consent from RIEGL.