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Arduino Global Positioning System (GPS) Shields - Arduino ADA1272, The Adafruit Ultimate GPS shield works with the Arduino UNO, Leonardo, Duemilanove or Diecimila boards to give an assembly that can log received data on to an SD card or can form the basis of a geocaching project. The GPS module is an ultra-compact Patch-On-Top device that provides high accuracy position and speed performance and has excellent high sensitivity and tracking capabilities, especially in urban environments. The GPS module can support up to 66 channels and is suitable for a wide range of GPS applications. Arduino ADA1272 Adafruit Ultimate GPS Shield