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Related Concept Videos

Field Application of Global Positioning System01:28

Field Application of Global Positioning System

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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...
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Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device01:30

Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device

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Surveyors use Global Positioning System (GPS) technology to measure the precise location and elevation of points on Earth. In a recent survey, GPS receivers were used to determine the coordinates and elevations of two park monuments. The process involved careful mission planning, data collection, and correction to ensure accuracy. The survey began with mission planning to identify optimal satellite visibility and minimize Position Dilution of Precision (PDOP). A geodetic control point...
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Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

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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...
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Errors in Global Positioning System01:26

Errors in Global Positioning System

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Global Positioning System (GPS) technology has revolutionized navigation and positioning, but its accuracy is often compromised by various errors. These errors, stemming from environmental, satellite, and receiver-related factors, require careful mitigation to ensure reliable performance across applications.Atmospheric ErrorsGPS signals travel through the Earth’s ionosphere and troposphere, introducing delays which affect accuracy. The ionosphere is strongly influenced by charged particles,...
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Magnetic Declination01:19

Magnetic Declination

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Magnetic declination is the angle between true north, which aligns with the Earth's rotational axis, and magnetic north, which follows the direction of the Earth's magnetic field. This discrepancy exists because the magnetic poles do not coincide with the geographic poles. The value of magnetic declination depends on the observer's location on Earth and is subject to changes over time due to the dynamic nature of the Earth's magnetic field.The declination is called eastern when magnetic north...
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Meridians01:28

Meridians

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In surveying, meridians are vital reference lines to measure directions and establish accurate land orientations. Meridians run from the north to the south poles, providing a stable framework for angular measurements and mapping. Meridians are fundamental in survey design, with the primary types being astronomic, magnetic, and assumed meridians. Each type offers distinct benefits and limitations, selected based on the project's scale and precision needs.The astronomic meridian is aligned with...
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Empirical Overview of Benchmark Datasets for Geomagnetic Field-Based Indoor Positioning.

Imran Ashraf1, Sadia Din1, Soojung Hur1

  • 1Department of Information and Communication Engineering, Yeungnam University, Gyeongbuk, Gyeongsan-si 38541, Korea.

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Summary
This summary is machine-generated.

This study analyzes public magnetic field positioning benchmarks, introducing DUST and DOWTS frameworks. It highlights challenges in benchmark selection for generalized indoor localization results.

Keywords:
benchmark analysisindoor positioningmagnetic field data benchmarksmagnetic field positioningsmartphone sensors

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Area of Science:

  • Computer Science
  • Geomatics Engineering
  • Signal Processing

Background:

  • Indoor positioning is crucial for location-based services, driven by smartphone proliferation.
  • Diverse technologies exist for indoor localization, with infrastructureless methods like magnetic field positioning gaining traction.
  • Challenges in magnetic field positioning include a lack of standardized benchmarks and undefined selection criteria.

Purpose of the Study:

  • To analyze public benchmarks for magnetic field-based indoor positioning.
  • To identify the pros and cons of existing benchmarks for evaluating positioning algorithms.
  • To propose frameworks for characterizing magnetic field datasets.

Main Methods:

  • Analysis of various public magnetic field datasets.
  • Introduction of the DUST (Device, User, Space, Time) framework for basic dataset characteristics.
  • Introduction of the DOWTS (Dynamicity, Orientation, Walk, Trajectory, and Sensor Fusion) framework for advanced dataset characteristics.

Main Results:

  • Identified limitations in current public benchmarks for magnetic field positioning.
  • Proposed DUST and DOWTS frameworks to categorize dataset properties.
  • Highlighted the need for defined benchmark selection criteria to ensure generalized positioning results.

Conclusions:

  • Standardized benchmarks and clear selection criteria are essential for reliable magnetic field-based indoor positioning.
  • The DUST and DOWTS frameworks provide a structured approach to understanding and evaluating magnetic field datasets.
  • Further research is needed to develop robust and generalizable indoor localization solutions.