CFP CFP Scene Reconstruction & Photogrammetry

Question 1

What is photogrammetry as applied in forensic crime scene investigation?

Accepted Answer

The science of obtaining reliable measurements and 3D spatial data from two-dimensional photographs

Answer

Forensic photogrammetry extracts precise measurements and spatial relationships from photographs, enabling accurate scene reconstruction without re-visiting the scene.

Question 2

Why is it mandatory to include a scale reference in forensic close-up photographs?

Accepted Answer

To allow accurate measurement of evidence size and spatial relationships when the photograph is analyzed later

Answer

A scale reference provides a known measurement within the image, enabling accurate size determination and proportional analysis of evidence during reconstruction.

Question 3

What is a 'total station' and how is it used in crime scene reconstruction?

Accepted Answer

An electronic surveying instrument that measures angles and distances to create precise coordinate data for scene mapping

Answer

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.

Question 4

When photographing skid marks for traffic accident reconstruction, what camera angle best captures length and direction?

Accepted Answer

A low, oblique angle parallel to the road surface, supplemented by overhead or elevated views

Answer

Low oblique angles reveal skid mark texture and direction while elevated views establish length and trajectory relative to road features.

Question 5

What is the purpose of an 'overall' photograph in crime scene documentation for reconstruction?

Accepted Answer

To establish the spatial context of the scene, showing the relationship between all major elements before close-up photography begins

Answer

Overall photographs orient viewers to the entire scene, establishing spatial relationships that allow reconstruction analysts to understand context.

(CFP) Certified Forensic Photographer Practice Test

(CFP) Certified Forensic Photographer Practice Test

CFP CFP Scene Reconstruction & Photogrammetry