True LiDAR Stories - Part Three - Land Surveying Video Guides - Land Surveyors United

True LiDAR Stories - Part Three That's Classified Production date: February 2014 Link: http://youtu.be/cFDuCdF_nYk Tags: LiDAR, surveying, University of Maine, Global Mapper This is the third video in a series of four that have been prepared for the University of Maine and its Surveying Engineering Technology Program to help illustrate the day-to-day applications of LiDAR in land surveying. In Part One (http://youtu.be/Npcagcw-j0Y) and Part Two (http://youtu.be/XODiBfuGdgc) we looked at setback issues predicated on LiDAR-derrived contours. In this part, we will take a closer examination as to which specific LiDAR points are used for contour generation and the shortcomings of the classification process that users of LiDAR data need to be aware of and when it is appropriate to employ reclassification algorithms. In this example, we see what I've referred to as a hole in the ground, an area that is clearly on open lawn yet devoid of legitimate bare ground returns and which instead have been classified as UNCLASSIFIED. Reclassification of the UNCLASSIFIED pulses allows us to fill in that hole and thereby generate contours more closely representative of the truth on the ground. Resources: USGS Center for LIDAR Information: http://lidar.cr.usgs.gov/ USGS Base Specifications used in 2010-2011 deliverables: http://lidar.cr.usgs.gov/USGS-NGP%20L... MCC-LIDAR is a command line application (FREE) for processing LiDAR data in forested environments. It classifies data points as ground or non-ground using the Multiscale Curvature Classification algorithm developed by Jeffrey S. Evans and Andrew T. Hudak. MCC-LIDAR's Home page: http://sourceforge.net/apps/trac/mccl... MCC-LIDAR's How to Run MCC-LIDAR: http://sourceforge.net/apps/trac/mccl... For more information on the Surveying Engineering Technology Program at the University of Maine please visit http://www.umaine.edu/set/svt/ and feel free to contact: Ms. Linda Liscomb School of Engineering Technology 5711 Boardman Hall, Room 119 Orono, Maine 04469-5711 207-581-2340 [email protected] HD Non-Streaming Alternatives: To download; Right click over link, Save As... Part One (513 MB) http://panocea.us/True-LiDAR-Stories/... Part Two (460 MB) http://panocea.us/True-LiDAR-Stories/... Part Three (991 MB) http://panocea.us/True-LiDAR-Stories/... Part Four (857 MB) http://panocea.us/True-LiDAR-Stories/...

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True LiDAR Stories - Part Three

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