Evaluating the benefits of octree-based indexing for lidar data

Abu Saleh Mohammad Mosa, Bianca Schön, Michela Bertolotto, Debra F. Laefer

Research output: Contribution to journalArticle

Abstract

Very large three-dimensional (3D) point datasets are increasingly common, such as from Light Detection and Ranging (lidar). Increasingly, there are attempts to exploit these 3D point data sets beyond mere visualization. However, current Spatial Information Systems provide only limited 3D support. Even commercial systems advertising in-built, 3D data types provide only minimal functionality. Specifically, there is no effective means of indexing large 3D point datasets, which is crucial for efficient analysis and engineering use. Also, many datasets are information rich (e.g., contain color or some other associated semantic information), which has yet to be fully exploited. This paper presents the implementation in a commercial spatial database of a spatial indexing technique using an octree data structure and highlights its advantages for sparse, as well as uniformly distributed, aerial lidar data. The implementation outperforms an existing r-tree index within the software, and offers additional functionality of attributebased 3D grouping.

Original languageEnglish (US)
Pages (from-to)927-934
Number of pages8
JournalPhotogrammetric Engineering and Remote Sensing
Volume78
Issue number9
DOIs
StatePublished - 2012

ASJC Scopus subject areas

  • Computers in Earth Sciences

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