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Field Application of Global Positioning System

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...

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 served as...

Types of Global Positioning System Surveys

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...

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,...

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,...

Common Leveling Mistakes and Errors

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Related Experiment Video

Updated: May 12, 2026

Setup of Consumer Wearable Devices for Exposure and Health Monitoring in Population Studies

Setup of Consumer Wearable Devices for Exposure and Health Monitoring in Population Studies

Published on: February 3, 2023

Evaluating children's location using a personal GPS logging instrument: limitations and lessons learned.

Donna Dueker¹, Maryam Taher², John Wilson²

¹Department of Preventive Medicine, University of Southern California, Los Angeles, CA, USA.

Journal of Exposure Science & Environmental Epidemiology

|April 4, 2013

Summary

Personal global positioning system (GPS) loggers collected less than 30% of daily location data in children, with poor nighttime accuracy. GPS utility is limited for population studies but may aid travel time assessments.

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Area of Science:

Environmental Health
Epidemiology
Geographic Information Systems

Background:

Global Positioning System (GPS) technology is increasingly utilized in population studies to measure geographically variable exposures.
However, the accuracy and completeness of personal GPS data, especially for children during daily activities, require thorough evaluation.

Purpose of the Study:

To evaluate the accuracy and completeness of personal GPS data loggers used by children during their usual activities.
To assess data completeness across different times of day, weekdays, and weekends, and nighttime accuracy.

Main Methods:

17 children wore GPS loggers for 4 days, recording location every 15 seconds.
Data completeness was assessed by the percentage of possible recorded points and 5-minute intervals with recorded locations.
Nighttime accuracy was evaluated during home hours.

Main Results:

Mean daily recorded location points were less than 30% of the total possible.
Data completeness varied significantly (1-55%) across participants and days, with higher completeness during school travel (91%).
Nighttime data showed less than 25% completeness in 5-minute intervals and poor accuracy.

Conclusions:

The substantial amount of missing GPS data limits its utility in broad population studies.
GPS technology shows potential for specific applications, such as assessing on-road travel time and routes.
Findings highlight GPS limitations and offer insights for its application in diverse research settings.