Current PE&RS Cover
ASPRS Lidar Committee (ASPRS LC)
(Formally PAD Lidar Terrain Mapping Committee)
Committee review materials – at our annual meeting in Portland 2008, several committee members volunteered their time to generate best practice documents for review (see April 29th 2008 committee meeting minutes. So far, documents relating to accuracy assessment frameworks, lidar point spacing definitions, and lidar sensor calibration have been submitted. These documents are attached here for review and comment by committee members:
- Quality Assurance and Quality Control of LiDAR Systems and Derived Data. Prepared by Ayman Habib & Jim Van Rens (Adobe PDF 468Kb)
- A New Framework for Accuracy Assessment of Lidar Data and Derived Elevation Models. Karen Schuckman, Penn State University and Lewis Graham, GeoCue Corporation (Adobe PDF 2.1Mb)
- Unbiased LiDAR Data Measurement (Draft), Ty Naus, Fugro Horizons, Inc. (Adobe PDF 680Kb)
(Link to attached three review documents). Feel free to download and review these materials, and send your feedback either to the authors directly or to current lidar committee chair: Dr Chris Hopkinson (chris.hopkinson@nscc.ca).
LAS Binary format update – The ASPRS LAS format is currently at version 1.2 with 1.3 currently under review for planned release in the next few months. The draft 1.3 version has undergone significant internal committee review already. The procedure for providing further feedback on the current draft is to contact Lewis Graham (primary developer of LAS) directly with specific comments or suggestions. The results of what we hope to be the final round of review will be distributed both internally to the committee and via this web site. Comments will be accepted until May 30th 2009. Any comments posted to none ASPRS lidar blogs or websites (e.g. CLICK) discussing this and related topics are not being monitored; direct email correspondence with Lewis (or the ASPRS lidar committee chair) is the only way that feedback can be recognized and acted upon.
Brief Introduction
The increasing use of laser scanning technology has identified a need to establish professional practices and guidelines covering the proper planning, implementation, data processing and QA/QC of laser/lidar data in various mapping projects. Further adoption of ALS (Airborne Laser Scanning) and TLS (Terrestrial Laser Scanning) technologies by data users and mapping practitioners requires common data exchange formats, sensor calibration routines, uniform data analysis, and accuracy assessments. The ASPRS decided to form our group of interest. Its first meeting was held on November 3, 1999. The ASPRS LC has several initiatives underway in conjunction with sensor manufacturers, data providers and data users to address these issues.
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