Chapter 8 – Photogrammetry

This chapter demonstrates various simple photogrammetry techniques that can help local crime scene technicians “get the job done.” Photogrammetry is another tool on the Bat-Belt of crime scene photographers. Photography can record life, as well as crime and accident scenes. With photogrammetry techniques, photography can also be used to extrapolate the precise measurements of the items within a photograph. Most crime scenes, and the evidence within them, are measured with tape measures so that crime scene diagrams can be constructed. As the crime scenes or accident scenes become larger and more elaborate, many departments use sophisticated laser sighting systems combined with computer software, like Total Station, to create very detailed maps of the scenes. Highly trained FBI image analysts can also extrapolate bank robbery subject heights and shotgun lengths with very sophisticated photogrammetric techniques. On many occasions, however, the personnel of local law enforcement agencies can use very elementary photogrammetric techniques. Basic photogrammetry techniques can help determine the location of evidence at smaller crime scenes.