I have done something similar to what you want. I developed an application that we needed for a study. It collects GSM and WiFI data, stores it in a file that I later process with a perl script. The script sends GSM and WiFi data to Google's geolocation api and retrieves location coordinates (like those in GPS). We needed a way to annotate events with location data without the user incurring any costs. Location information is critical to our work but doesn't really need to be calculated immediately. We wrote a paper on it with results of how accurate this method was, turned out to be pretty good. WiFi info gets you a better location then GSM (more precise) and sending both WiFi and gsm doesn't do any better than just WiFi. Also, there is a caveat if you don't operate the phone strictly in 2G mode the method that retrieves neighbouring cell info returns -1 for all data. You can only get information from the cell you are connected to when in 3G. It's a limitation of the API. No dia 10 de Jun de 2011 02:39, "Davide Ronchi" <id...@idave.it> escreveu:
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