Final answer:
In crime scene sketches, measurements can be determined using triangulation, baseline, or rectangular methods, with each providing a systematic way of recording object locations accurately.
Step-by-step explanation:
There are three primary methods for determining measurements in a crime scene sketch: the triangulation method, the baseline method, and the rectangular (or coordinate) method.
- Triangulation Method: This involves forming triangles and taking measurements from two fixed points to the object to determine the exact position of evidence.
- Baseline Method: Utilizes a fixed point to draw a straight line and then measure perpendicular lines from this baseline to the object's location on the sketch.
- Rectangular Method: Similar to the baseline method, but it involves forming a grid system to map out the scene, measuring from two perpendicular lines.
Each method serves the purpose of accurately recording the spatial relationships between objects at a crime scene. From these methods, triangulation is often considered the most precise, whereas baseline and rectangular methods can be more practical in outdoor or larger scenes.