Publications

• The Application of Augmented Reality to Reverse Camera Projection
• Reconstruction of 3D Accident Sites Using USGS LiDAR, Aerial Images and Photogrammetry
• A Survey of Multi-View Photogrammetry Software for Documenting Vehicle Crush
• An Evaluation of Two Methodologies for Lens Distortion Removal when EXIF Data is Unavailable
• Using Multiple Photographs and USGS LiDAR to Improve Photogrammetric Accuracy
• An Analysis of Body-Worn Camera Photogrammetry Using Depth Mapping
• A Comparison of Metrology Used in Documenting Shooting Incident Trajectories

Specialties & Experience of this Expert Witness

Additional Information

Mr. Terpstra is a Senior 3D Analyst at J.S. Held and specializes in photogrammetry, video analysis and 3D site reconstruction. He has testified in state and federal courts on civil and criminal matters, and has been retained by plaintiff, prosecution, and defense counsel. He has published more than 20 peer-reviewed publications with the Society of Automotive Engineers (SAE), the Acoustical Society of America (ASA), the American Academy of Forensic Sciences (AAFS), and the Association for Crime Scene Reconstruction (ACSR), in the areas of reverse camera projection, onsite photogrammetry, lens distortion correction, photo-scanning, camera-matching photogrammetry, 3D scene reconstruction, LiDAR, virtual reality, videogrammetry, and acoustics. Mr. Terpstra also serves as a peer reviewer for SAE, ACSR, and the Association of Firearm and Tool Mark Examiners (AFTE). He is a certified Forensic Video Technician through the Law Enforcement and Emergency Services Video Association International (LEVA). He is currently the lead instructor for an ACTAR (Accreditation Commission for Traffic Accident Reconstruction) accredited, three-day course offered by SAE titled: “Photogrammetry and Digital Media Analysis”, and an instructor for the Basic Laser Scanning Certification course offered by the International Association of Forensic Security and Metrology (IAFSM). Mr. Terpstra currently serves as a member of the Forensic Metrology Task Group within the Crime Scene Investigation and Reconstruction Subcommittee in the Organization of Scientific Area Committees (OSAC), which is administered by the National Institute of Standards and Technology (NIST). Photographs and video are prevalent in our society, and the areas of video analysis, photogrammetry, and 3D site reconstruction are applicable to a wide range of incidents in various industries. Mr. Terpstra works on cases related to product liability, vehicular accidents, tree failure, sports-related incidents, fire cause and origin, industrial accidents, use of force, and shooting incident reconstruction.