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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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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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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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Introduction to Global Positioning System01:30

Introduction to Global Positioning System

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The Global Positioning System (GPS) revolutionized positioning on Earth, providing precise location data through satellite ranging. The GPS system was developed in 1978 by the U.S. Department of Defense  for military use, and it became available for civilian applications in 1983, transforming fields including navigation, fleet management, and time synchronization for telecommunications systems.GPS consists of satellites in medium Earth orbit, about 20,200 kilometers above the surface,...
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Distance Measurements by Taping01:18

Distance Measurements by Taping

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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...
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Related Experiment Video

Updated: Aug 27, 2025

Author Spotlight: Enhancement of Salient Object Detection for Smart Grid Applications
03:31

Author Spotlight: Enhancement of Salient Object Detection for Smart Grid Applications

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Practical and Accurate Indoor Localization System Using Deep Learning.

Jeonghyeon Yoon1, Seungku Kim1

  • 1Department of Electronics Engineering, Chungbuk National University, Cheongju 28644, Korea.

Sensors (Basel, Switzerland)
|September 23, 2022
PubMed
Summary
This summary is machine-generated.

This study presents a practical smartphone-based indoor localization system using pedestrian dead reckoning (PDR) and deep learning. The proposed method achieves accurate indoor positioning with a distance error of 3-5 meters.

Keywords:
GPSdeep learningindoor localizationpedestrian dead reckoning

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Area of Science:

  • Computer Science
  • Electrical Engineering
  • Geomatics Engineering

Background:

  • Indoor localization is crucial for location-based services on smartphones.
  • Pedestrian dead reckoning (PDR) using inertial measurement units (IMUs) offers a practical indoor localization approach.
  • Existing deep learning methods for indoor localization can be complex and less practical.

Purpose of the Study:

  • To propose a smartphone-based indoor localization system utilizing PDR.
  • To develop a deep learning model for accurate moving speed estimation using accelerometer and GPS data.
  • To enhance positioning accuracy through advanced data processing and deep learning techniques.

Main Methods:

  • Smartphone-based pedestrian dead reckoning (PDR).
  • Deep learning model for moving speed estimation, using accelerometer and GPS data.
  • Data preprocessing, data augmentation, deep learning modeling, and heading direction correction.

Main Results:

  • Experimental validation in a 240m horseshoe-shaped indoor building.
  • Achieved a distance error of approximately 3 to 5 meters.
  • Demonstrated a practical and accurate indoor localization solution compared to conventional methods.

Conclusions:

  • The proposed smartphone-based PDR system with deep learning offers a practical and accurate indoor localization solution.
  • The integration of data preprocessing, augmentation, and heading correction significantly improves positioning accuracy.
  • This approach provides a viable alternative for location-based services in indoor environments.