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Nominal Pulse Spacing (NPS)

In the LIDAR industry the generally accepted definition for Nominal Pulse Spacing (NPS) is the one detailed in the USGS base LIDAR Specification. That is the spacing between points in the collection when in reference to single instrument, single swath, first return only LIDAR point data. The NPS is a value that is usually predicted by…

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Point Data Record Format (PDRF)

ASPRS (American Society for Photogrammetry and Remote Sensing) LAS Specification defines the attributed that can be stored in each point data record format (0 through 10). The chart below provides a summary as to which attributes can be stored in which format. Attribute 0 1 2 3 4 5 6 7 8 9 10 X…

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LIDAR Quality Levels – Part 1

The LIDAR community has been gradually adopting the terminology “Quality Level” to categorize airborne LIDAR data. The idea is to use a simple scheme to characterize the more important features of a LIDAR data set into a few broad groups designated QLn where n is the quality level. LIDAR Quality Levels – Part 1

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New to LIDAR processing and looking for some reference material to strengthen your knowledge in the field?

May we suggest the following: Airborne Topographic Lidar Manual by Michael Renslow, Editor https://eserv.asprs.org/web/staticcontent/staticpages/4587.htm Topographic Laser Ranging & Scanning Principles & Process by Jie Shan and Charles Toth https://eserv.asprs.org/web/staticcontent/staticpages/4583.htm  Digital Elevation Model Technologies & Applications, 2nd Ed. by David F. Maune, Editor https://eserv.asprs.org/web/staticcontent/staticpages/1069.htm

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GeoCue Knowledge Base Ready for Use

The GeoCue Group Knowledge Base is a one stop shop for information and support for all GeoCue Group products (Figure 1). Product information is available for AirGon, GeoCue, LP360 and Terrasolid. This searchable site makes finding information easy and fast. Search for product specific workflows, installation and licensing information, case studies or investigate the Frequently…

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New ASPRS Positional Accuracy Standards for Digital Geospatial Data Released

Press Releases New ASPRS Positional Accuracy Standards for Digital Geospatial Data Released Details Created on 02 March 2015 Last Updated on 02 March 2015 BETHESDA, Md., March 2, 2015 – The American Society for Photogrammetry and Remote Sensing (ASPRS) is pleased to announce the release of the new Positional Accuracy Standards for Digital Geospatial Data.…

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Coordinates, Coordinate Systems and LIDAR Data (Part 3)

In the previous articles we provided an introduction to coordinate systems, geoids, datums and projections. This background information was needed in order to delve into more details on transformations and changing projections in the various software packages to help you do more with LIDAR data. This article will provide the information into transformations and changing…

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Coordinates, Coordinate Systems and LIDAR Data (Part 2)

In the previous article, we briefly mentioned coordinate systems while looking at how they played a role when defining the MicroStation design cube and setting up the Terrasolid software. A brief mention was fine for that setup, but if we wish to delve into more details on transformations and changing projections in the various software…

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