Delorme Earthmate GPS (AE-007985-201) Product Details
The PN-40 comes equipped with a three-axis electronic compass that can provide compass direction while stationery. The electronic compass is disabled when moving and the GPS heading is used. The PN-40 makes it easy to calibrate the compass for use in the field; simply follow the on-screen directions and you’re set to go.
DeLorme also includes an accelerometer, which in tandem with the compass provides the ability to figure the angle the GPS is tilted and determine an accurate compass reading regardless of how you are holding the PN-40 in your hand (tilted up, face down, etc.). Accelerometers measure the amount of static acceleration due to gravity; by sensing the amount of dynamic acceleration, the PN-40 can analyze the way the device is moving and make adjustments.
The PN-40 comes equipped with a barometric altimeter for providing accurate altitude readings. The barometric altimeter works in conjunction with the GPS to measure elevation when using auto calibration (if auto calibration is disabled, then the barometric altimeter is the only sensor providing elevation information). GPS by itself can only factor an approximate altitude reading, but in conjunction with the altimeter the PN-40 can provide accurate elevation data.
^^ NEW! Blazing-fast, high-sensitivity 32-channel STMicroelectronics Cartesio chipset
^^ NEW! Dual-core processor for instantaneous map and satellite imagery redraws, even with large aerial imagery files and multiple maps layers
^^ 360° raster rotation sets the PN-40 apart from other common GPS handhelds. With 360° rotation road, building, and other images really are on your left or right as you look at the map and walk, bike or drive
^^ 3-axis electronic compass with included accelorometer performs when held in any position—while in motion or standing still
^^ Sensitive barometric altimeter for reliably accurate altitude readings
^^ WAAS-enabled for accuracy within 3 meters
^^ NEW! Now supports SDHC high-capacity SD cards (up to 32 GB) for fast and direct map transfer from the included maps discs