In this section you will see how a simple concept can increase the accuracy of GPS to almost unbelievable limits.

And you will see:

• Why we need Differential GPS
• Differential GPS or "DGPS" can yield measurements good to a couple of meters in moving applications and even better in stationary situations.
• How Differential GPS works
• Differential GPS involves the cooperation of two receivers, one that's stationary and another that's roving around making position measurements.
• Where to get Differential Corrections
• Many new GPS receivers are being designed to accept corrections, and some are even equipped with built-in radio receivers.
• Other ways to work with Differential GPS
• Not all DGPS applications are created equal. Some don't need the radio link because they don't need precise positioning immediately.
• Advanced Concepts
• Imagine the possibilities. Automatic construction equipment could translate CAD drawings into finished roads without any manual measurements.