Alternatively, some online tools such as GPSTagr can geotag Flickr photos once users upload a GPS track log. GPS products from DeLorme and Sony include their own software for adding the geotags, but photographers who shoot higher-end "raw" images-the unprocessed camera sensor data-have to try other programs such as GPSPhotoLinker or Breeze Systems Downloader Pro. Then software stamps the photos with the GPS location from the time the picture was taken-a process that can be complicated if the camera's time isn't set precisely. GPS track logs-which come in a variety of formats-must be transferred from the receiver to the computer. One sticky point in the geotagging process is the unification of the GPS data with the image files. We want to make it universal," adds Kakul Srivastava, Flickr's director of product management. "Most of the people doing it now are geotagging nerds. "It's possible, but it still requires some tech-savviness," said Schreve, the chief executive and founder of a start-up EveryTrail and its new GlobalMotion offshoot, Web sites that let users display GPS journey tracks and geotagged photos. ![]() Geotagging rates only about 4 on a maturity scale of 1 to 10, said geotagging expert Joost Schreve. ![]() "Giving that context provides a new way to discover information or get a sense of what it's like to be there." Location data "gives a context to a lot of information in the world," said Chikai Ohazama, product manager for Google Earth.
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