Parallel processing of airborne laser scanning data using a hybrid model based on MPI and OpenMP

Soohee Han, Ilsuk Park, Joon Heo

Research output: Contribution to journalArticle

Abstract

In the present study, a parallel processing method running on a multi-core PC-Cluster is introduced to produce digital surface model (DSM) and digital terrain model (DTM) from huge airborne laser scanning data. A hybrid model using both message passing interface (MPI) and OpenMP was devised by revising a conventional MPI model which utilizes only MPI, and tested on a multi-core PC-Cluster for performance validation. In the results, the hybrid model has not shown better performances in the interpolation process to produce DSM, but the overall performance has turned out to be better by the help of reduced MPI calls. Additionally, scheduling function of OpenMP has revealed its ability to enhance the performance by controlling inequal overloads charged on cores induced by irregular distribution of airborne laser scanning data.

Original languageEnglish
Pages (from-to)135-142
Number of pages8
JournalJournal of the Korean Society of Surveying Geodesy Photogrammetry and Cartography
Volume30
Issue number2
DOIs
Publication statusPublished - 2012 Apr

All Science Journal Classification (ASJC) codes

  • Earth and Planetary Sciences(all)

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