CFP Scene Reconstruction & Photogrammetry Flashcards
6 cards from real CFP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CFP Scene Reconstruction & Photogrammetry flashcards as text
What is photogrammetry as applied in forensic crime scene investigation?
Answer: The science of obtaining reliable measurements and 3D spatial data from two-dimensional photographs
Forensic photogrammetry extracts precise measurements and spatial relationships from photographs, enabling accurate scene reconstruction without re-visiting the scene.
Why is it mandatory to include a scale reference in forensic close-up photographs?
Answer: To allow accurate measurement of evidence size and spatial relationships when the photograph is analyzed later
A scale reference provides a known measurement within the image, enabling accurate size determination and proportional analysis of evidence during reconstruction.
What is a 'total station' and how is it used in crime scene reconstruction?
Answer: An electronic surveying instrument that measures angles and distances to create precise coordinate data for scene mapping
A total station uses laser distance measurement and angle detection to produce accurate X/Y/Z coordinates for every point of interest at a scene.
When photographing skid marks for traffic accident reconstruction, what camera angle best captures length and direction?
Answer: A low, oblique angle parallel to the road surface, supplemented by overhead or elevated views
Low oblique angles reveal skid mark texture and direction while elevated views establish length and trajectory relative to road features.
What is the purpose of an 'overall' photograph in crime scene documentation for reconstruction?
Answer: To establish the spatial context of the scene, showing the relationship between all major elements before close-up photography begins
Overall photographs orient viewers to the entire scene, establishing spatial relationships that allow reconstruction analysts to understand context.
What does 'rectified photography' correct for in forensic scene documentation?
Answer: Lens distortion and perspective convergence so that parallel lines in the scene appear parallel in the image
Rectification removes perspective and lens distortion, producing geometrically accurate images from which true measurements can be extracted.