Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Distance Corrections01:15

Distance Corrections

96
To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
96
Estimation of the Physical Quantities01:05

Estimation of the Physical Quantities

6.3K
On many occasions, physicists, other scientists, and engineers need to make estimates of a particular quantity. These are sometimes referred to as guesstimates, order-of-magnitude approximations, back-of-the-envelope calculations, or Fermi calculations. The physicist Enrico Fermi was famous for his ability to estimate various kinds of data with surprising precision. Estimating does not mean guessing a number or a formula at random. Instead, estimation means using prior experience and sound...
6.3K
Uncertainty in Measurement: Reading Instruments02:46

Uncertainty in Measurement: Reading Instruments

47.5K
Counting is the type of measurement that is free from uncertainty, provided the number of objects being counted does not change during the process. Such measurements result in exact numbers. By counting the eggs in a carton, for instance, one can determine exactly how many eggs are there in the carton. Similarly, the numbers of defined quantities are also exact. For example, 1 foot is exactly 12 inches, 1 inch is exactly 2.54 centimeters, and 1 gram is exactly 0.001 kilograms. Quantities...
47.5K
Accuracy and Precision01:52

Accuracy and Precision

11.9K
Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value.  Highly accurate...
11.9K
Measurement of Air Content in Concrete01:23

Measurement of Air Content in Concrete

305
Air content measurement in concrete is critical for ensuring structural integrity and durability of concrete structures, especially in environments prone to severe weather conditions. Accurate air content analysis optimizes concrete's resistance to freeze-thaw cycles and enhances its workability and strength. Several methods are standardized under ASTM guidelines to measure the air content in fresh concrete, each suitable for different concrete types and conditions.
The pressure method,...
305
Statistical Analysis: Overview01:11

Statistical Analysis: Overview

8.4K
When we take repeated measurements on the same or replicated samples, we will observe inconsistencies in the magnitude. These inconsistencies are called errors. To categorize and characterize these results and their errors, the researcher can use statistical analysis to determine the quality of the measurements and/or suitability of the methods.
One of the most commonly used statistical quantifiers is the mean, which is the ratio between the sum of the numerical values of all results and the...
8.4K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

HPV Integration in Head and Neck Cancer: Downstream Splicing Events and Expression Ratios Linked with Poor Outcomes.

Clinical cancer research : an official journal of the American Association for Cancer Research·2025
Same author

Hair root sonication washing impact on nuclei counts.

Journal of forensic sciences·2025
Same author

Risk Stratification in HPV-Associated Oropharyngeal Cancer: Limitations of Current Approaches and the Search for Better Solutions.

Cancers·2025
Same author

HPV integration in head and neck cancer: downstream splicing events and expression ratios linked with poor outcomes.

bioRxiv : the preprint server for biology·2025
Same author

Assessing Single-Source Reproducibility of Human Head Hair Peptide Profiling from Different Regions of the Scalp.

Forensic science international. Genetics·2020
Same author

A quantitative method for selecting a hair for nulear DNA analysis.

Forensic science international. Genetics·2020

Related Experiment Video

Updated: Sep 29, 2025

Applicability Analysis of Assessment Methods for Morphological Parameters of Corroded Steel Bars
10:24

Applicability Analysis of Assessment Methods for Morphological Parameters of Corroded Steel Bars

Published on: November 1, 2018

6.8K

Assessing agreement among crime scene measurement methods.

Maria Lawas1,2, Susan Y Williams2,3, Steven Jameson2,3

  • 1Visiting Scientist Program, Oak Ridge Institute for Science and Education, Oak Ridge, Tennessee, USA.

Journal of Forensic Sciences
|March 24, 2022
PubMed
Summary

Crime scene documentation accuracy varies by method. FARO LiDAR showed high agreement with Total Station, while drones without ground control points (GCPs) had the least accuracy. GCPs are crucial for drone measurements.

Keywords:
crime scene documentation methodscrime scene reconstructionforensic sciencemeasurement accuracy

More Related Videos

Standardized Method for Measuring Collection Efficiency from Wipe-sampling of Trace Explosives
07:22

Standardized Method for Measuring Collection Efficiency from Wipe-sampling of Trace Explosives

Published on: April 10, 2017

9.7K
Accuracy in Dental Medicine, A New Way to Measure Trueness and Precision
07:57

Accuracy in Dental Medicine, A New Way to Measure Trueness and Precision

Published on: April 29, 2014

13.5K

Related Experiment Videos

Last Updated: Sep 29, 2025

Applicability Analysis of Assessment Methods for Morphological Parameters of Corroded Steel Bars
10:24

Applicability Analysis of Assessment Methods for Morphological Parameters of Corroded Steel Bars

Published on: November 1, 2018

6.8K
Standardized Method for Measuring Collection Efficiency from Wipe-sampling of Trace Explosives
07:22

Standardized Method for Measuring Collection Efficiency from Wipe-sampling of Trace Explosives

Published on: April 10, 2017

9.7K
Accuracy in Dental Medicine, A New Way to Measure Trueness and Precision
07:57

Accuracy in Dental Medicine, A New Way to Measure Trueness and Precision

Published on: April 29, 2014

13.5K

Area of Science:

  • Forensic Science
  • Geomatics Engineering
  • Photogrammetry

Background:

  • Accurate crime scene reconstruction is vital for legal proceedings.
  • Numerous documentation methods exist, but their comparative accuracy is not well-established.
  • Understanding measurement accuracy across different distances is crucial for method selection.

Purpose of the Study:

  • To evaluate and compare the accuracy of eight crime scene documentation methods.
  • To assess the impact of measurement distance on the accuracy of these methods.
  • To determine the influence of ground control points (GCPs) on drone-based measurements.

Main Methods:

  • Relative accuracy assessment of eight documentation methods against a Total Station (ground truth).
  • Measurements were taken between reference ground targets in an outdoor scene.
  • Analysis included the effect of measurement distance and the use of GCPs or reference scales.

Main Results:

  • Most methods showed small differences (< 0.25 inches) compared to Total Station.
  • FARO LiDAR demonstrated the highest agreement; drones without GCPs showed the least.
  • GCPs or reference scales were essential for mitigating distance-related imprecision in drone and orthomosaic methods.
  • No significant difference was found between 2D and 3D measurement configurations for Total Station.

Conclusions:

  • Method selection for crime scene documentation should consider accuracy and the need for ground control points.
  • Establishing a known distance range (ground truth) is essential for validating new measurement tools.
  • FARO LiDAR and Total Station offer reliable measurements, while drone accuracy is significantly enhanced by GCPs.