Nikon GP-1 GPS receiver

Nikon's GP-1 GPS receiver is an optional geo-tagging add-on for a range of Nikon DSLRs. It acquires GPS latitude, longitude, altitude, and time information and writes the data into the photo's meta data information section (EXIF in the case of JPEG). Satellite acquisition is ~45 sec from cold start, and it can be configured to continue geo-tagging photos with the last available position even when GPS fix is lost (e.g. inside buildings). Besides the proprietary connector that is compatible with Nikon's D90, D3, D300, D700, D2Xs and D200 cameras, it can be hooked up to any computer via a standard USB port, feeding GPS data to it. When connected to a Nikon camera, it draws power from the camera's battery, otherwise over USB. The GP-1 has been available in the US since Q1 2009.