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Webinar Wednesday: Comparison of Survey Methods for Surface Change Estimation

  • 23 Jun 2021
  • 12:00 PM - 1:00 PM
  • Online


  • Member of PSLS
  • Not a member of PSLS
  • Member of a professional organization in the Geospatial industry such as NSPS, PSPE, PCPG, etc. Contact psls@psls.org for code.


Wednesday Webinar

 Comparison of Survey Methods for Surface Change Estimation

by  Dr. Dimitrios Bolkas

(If you are a new member pending approval, please register as a non-member, choose to be invoiced, and contact the office at psls@psls.org)

Date: June 23, 2021

Time: 12:00 PM - 1:00 PM


  • PSLS Members: $40
  • Non-Members: $60
  • Member of  Other  Professional Organization: $40

CE Credits: 1 PDH

Course Description:

This webinar will compare different surveying methods, namely small unmanned aerial system (sUAS) photogrammetry and terrestrial laser scanning (TLS), for capturing soil surface change in a mine reclamation project. Datasets from two epochs, before and post-tillage were acquired at a mine reclamation project in Central PA. In addition to the point cloud data acquisitions, we have augmented comparisons with traditional total station survey used as reference for vegetation penetration. We compare the sUAS and TLS datasets for their advantages and disadvantages through a cross section analysis. The insights gained by this project can help surveyors, photogrammetrists and other practitioners to improve their data acquisition planning in similar applications.

Presenter Bio: 

Dr. Dimitrios Bolkas

is an Assistant Professor of Surveying Engineering at the Pennsylvania State University, Wilkes-Barre Campus. He received his B.Sc. in Surveying Engineering from the Aristotle University of Thessaloniki, Greece, and his Ph.D. in Geological Sciences and Engineering from Queen’s University, Kingston, Canada. He has a diverse experience in geomatics that includes terrestrial, mobile, and airborne laser scanning, digital elevation models, unmanned aerial systems, photogrammetry, GNSS networks, geoid and gravity-field modeling. His main research interest is on building methods to increase, understand, and assess quality/uncertainty in 3D geospatial datasets. In addition, his research develops new methods and techniques to enhance functionality of 3D geospatial data and models. Recent research endeavors focus on creating virtual environments from point-cloud data and using virtual reality to enhance engineering education. Dr. Bolkas is a director in the executive board of the Surveying and Geomatics Educator’s Society (SaGES). He is also a member of the Education Committee of the Pennsylvania Society of Land Surveyors (PSLS).

Note: Members of other Professional societies such as PSPE, NSPS, ACSM, or other state surveying societies may register at the discounted price. In order to receive the necessary code, registrants must contact PSLS with proof of membership. Please email psls@psls.org.

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