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Related Concept Videos

Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
Adjusting a Traverse01:12

Adjusting a Traverse

In the site survey of a four-sided traverse, internal angles are essential to ensure geometric accuracy. The survey revealed that the sum of the measured internal angles was 359 degrees and 48 minutes, which is 12 minutes less than the expected 360 degrees. This discrepancy signals an error likely arising from measurement inaccuracies during the fieldwork.To rectify this error, the adjustment process involved distributing the 12-minute shortfall equally across the four internal angles. By...
Distance Measurements by Taping01:18

Distance Measurements by Taping

Tapes are essential in surveying for accurate, durable, and short-distance measurements. Made from lightweight, nylon-coated steel, they offer flexibility and strength for rugged outdoor use. The nylon coating protects against rust and wear, extending the tape's life. Standard lengths, around 30 meters, are marked in meters and millimeters for precision.Surveyors select tapes based on site conditions and accuracy needs. Lightweight, nylon-coated tapes are commonly used for ease of handling and...
Distance Corrections01:15

Distance Corrections

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...
Field Application of Global Positioning System01:28

Field Application of Global Positioning System

The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...
Common Leveling Mistakes and Errors01:17

Common Leveling Mistakes and Errors

A survey team is tasked with determining the elevation difference between points Point A and Point B, separated by uneven terrain. They use a leveling instrument and a leveling rod.Common MistakesMisreading the Rod: During a backsight reading at Point A, the instrumentman observes the rod partially obscured by tall grass. Instead of reading 1.135 m, they mistakenly record 1.735 m due to the misalignment of the crosshair with the wrong graduation. This error adds 0.600 m to all subsequent...

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Related Experiment Video

Updated: May 26, 2026

Measurement of Spatial Stability in Precision Grip
09:36

Measurement of Spatial Stability in Precision Grip

Published on: June 4, 2020

Performance evaluation of triangulation based range sensors.

Gabriele Guidi1, Michele Russo, Grazia Magrassi

  • 1Department of Industrial Design, Art, Communication and Fashion (INDACO)-Politecnico di Milano, Via Durando 38/A, 20158, Milan, Italy. gabriele.guidi@polimi.it

Sensors (Basel, Switzerland)
|December 14, 2011
PubMed
Summary
This summary is machine-generated.

This study introduces standardized methods for evaluating 3D imaging systems, like laser scanners. It extends existing 2D imaging standards to assess resolution, accuracy, and uncertainty in 3D equipment.

Keywords:
3D measurementaccuracylaser scannermetrological characterizationpattern projectionresolutionuncertainty

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Area of Science:

  • Metrology
  • Computer Vision
  • Optical Engineering

Background:

  • 2D imaging systems have established standards for performance evaluation (resolution, noise, dynamic range).
  • Existing ISO standards are designed for photographic and 2D scanning equipment.
  • No standardized protocols exist for evaluating 3D imaging systems (e.g., laser scanners, structured light scanners).

Purpose of the Study:

  • To investigate experimental processes for evaluating critical parameters of 3D imaging equipment.
  • To extend 2D imaging ISO standard concepts into the 3D domain.
  • To propose an easy characterization process for reliable comparison and compliance checking of 3D range sensors.

Main Methods:

  • Characterizing different range sensors using 3D data acquisitions.
  • Utilizing specifically designed test objects with known geometrical characteristics.
  • Extracting resolution, accuracy, and uncertainty from acquired 3D datasets.

Main Results:

  • Demonstrated a method for extracting key performance metrics from 3D sensor data.
  • Provided a framework for comparing diverse 3D imaging technologies.
  • Enabled verification of 3D equipment compliance with expected performance.

Conclusions:

  • The proposed experimental process facilitates reliable performance comparison of 3D range sensors.
  • This methodology allows for the verification of 3D equipment against specified characteristics.
  • Standardized evaluation is crucial for advancing 3D imaging technology and applications.