VISUAL LAW GROUP and 4D FORENSICS have developed and verified a number of innovative photogrammetric techniques and workflows. We specialize in laser scanning assisted photogrammetry, but also continue to provide close-range, perspective, and alignment photogrammetry as well as drone-based projects.

It is impossible to exaggerate how important high resolution ortho-imagery has become to our clients. Visual Law has commissioned and used aerial imagery for more than 20 years but only recently has photogrammetric software developed in conjunction with aerial drones to be able to create custom ultra-high resolution orthographic images. Unlike normal aerial photographs, orthographic aerials are actually sophisticated mosaics generated from hundreds of individual photographs taken by the drone. When processing is complete, the aerial image is absolutely accurate in scale with astonishing detail.

In the past, it has been necessary to commission a survey team with a total station to visit a site to acquire an accurate scale diagram to be used for accident reconstruction. The survey process, however, can never match the detail and accuracy of these orthographic mosaics. Roadway markings, tire skid marks, paint scrapes, debris and all other important landmarks are faithfully and accurately documented in the ortho-imagery. Moreover, it is not necessary to block off a scene or stop traffic to acquire the imagery you see here. As a tool, orthographic mosaics have revolutionized the documentation of collision scenes and have changed the way our clients are able to present a case to a jury.

Visual Law can fly a given location at different times to generate comparative images showing shadow positions or other temporal changes. In many instances it becomes very useful to examine a scene under different lighting or weather conditions.