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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...
112
Errors in Global Positioning System01:26

Errors in Global Positioning System

127
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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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

186
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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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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Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

131
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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Design Example: Alignment of a Road Line Using GIS01:17

Design Example: Alignment of a Road Line Using GIS

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The alignment of a road line using Geographic Information Systems (GIS) is a critical process in civil engineering, combining advanced technology with practical decision-making. This methodology begins with the collection of geospatial data, including information on land cover, geomorphology, drainage patterns, slope, and contour details. Such data is typically acquired through satellite imagery and GIS tools, offering a comprehensive understanding of the terrain.Once the data is gathered, it...
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Related Experiment Video

Updated: Sep 30, 2025

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
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Development of a GPU-Accelerated NDT Localization Algorithm for GNSS-Denied Urban Areas.

Keon Woo Jang1, Woo Jae Jeong1, Yeonsik Kang1

  • 1Department of Automotive Engineering, Kookmin University, 77 Jeongneung-ro, Seongbuk-gu, Seoul 02707, Korea.

Sensors (Basel, Switzerland)
|March 10, 2022
PubMed
Summary
This summary is machine-generated.

This study accelerates light detection and ranging (LiDAR) localization for autonomous driving in GPS-denied areas. The new algorithm significantly boosts computational speed on embedded systems without sacrificing localization accuracy.

Keywords:
3D LiDARGPGPUNDTROSautonomous vehiclelocalization

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Area of Science:

  • Robotics
  • Computer Vision
  • Geospatial Technology

Background:

  • Autonomous driving faces localization challenges in urban, global navigation satellite system-denied environments.
  • High-resolution light detection and ranging (LiDAR) sensors offer precise distance measurements for improved localization.
  • Existing map-matching algorithms for LiDAR localization can be computationally intensive.

Purpose of the Study:

  • To develop an algorithm that accelerates LiDAR localization computational speed.
  • To maintain the accuracy of lightweight map-matching algorithms during acceleration.
  • To enable efficient autonomous vehicle navigation in challenging urban settings.

Main Methods:

  • Transformed point cloud maps into normal distribution (ND) maps using vector-based normal distribution transform.
  • Implemented graphics processing unit (GPU) parallel processing for the ND map-matching process.
  • Validated the algorithm using open datasets, simulations, and real-time embedded system comparisons.

Main Results:

  • Achieved a nearly 100-fold increase in computational speed on an embedded computer.
  • Maintained high localization precision comparable to original algorithms.
  • Demonstrated practical real-time performance through serial and parallel processing comparisons.

Conclusions:

  • The proposed algorithm effectively accelerates LiDAR localization for autonomous driving.
  • GPU parallel processing of ND maps is a viable method for enhancing real-time performance.
  • This advancement is crucial for reliable autonomous navigation in GPS-denied urban areas.