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GPS

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Global Positioning System

The Global Positioning System has been in use for several years, but it has been growing in popularity recently because it is becoming accurate enough to get the attention of businesses. In fact, when accuracy down to a centimeter becomes cost-effective, some things you might not expect can become automated, such as building a house. The growing demand from businesses is creating a growing need for GPS-enabled software, known as "location-based services." This section is designed to help programmers be ready for the coming wave of location-based software development.

Understanding GPS

•  ?How GPS Works
• NMEA Reference Guide
•  ?GPS Programming Best Practices
•  ?Third-Party GPS Components

GPS Software Development

• The Core of An NMEA Interpreter
• Reading Latitude and Longitude
• Taking Out the Garbage: NMEA Checksums
• Wireless Atomic Time
• Direction and Speed Alerts
• Are We Fixed Yet
•  ?Real-Time Satellite Tracking
•  ?A World-Class NMEA Interpreter

Developing Commercial GPS Applications

• The Importance of Understanding Precision
• Causes of Precision Error
• Geometric Dilution of Precision (DOP)
•  ?An Interpretation of DOP Values
•  ?Determining Precision Needs
•  ?Enforcing Precision
•  ?Creating a High-Precision Application

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