2014/10/15 下午 10:15:06

iphone Programming Glossary: triangulation

Finding Distance from RSSI value of bluetooth low energy enable device

http://stackoverflow.com/questions/13705647/finding-distance-from-rssi-value-of-bluetooth-low-energy-enable-device

4m gives 52dB 8m gives 58dB 16m gives 64dB. You can not get an exact position only a circular maximum distance. Using triangulation with 2 3 or more devices you get a much more accurate positioning result. You can get this purely from Advertisement packages..

Corelocation incorrect distances

http://stackoverflow.com/questions/3093919/corelocation-incorrect-distances

double not int. Location can change quickly when GPS first starts because you have a low accuracy location from cell triangulation then as you get GPS acquisition you get a higher accuracy location. Those can be far apart 1000m and it appears that you..

How to obtain the current location inside a building using an iphone?

http://stackoverflow.com/questions/3318437/how-to-obtain-the-current-location-inside-a-building-using-an-iphone

window which there are usually very few of in a mall anyway . You will not get useful positional information from cell triangulation not at mall airport terminal scale anyway . I'm afraid I can't see any way to do what you are trying. EDIT come to think..

decoding the CLLocationAccuracy const's

http://stackoverflow.com/questions/3411629/decoding-the-cllocationaccuracy-consts

set how hard the location manager works specifically what is enabled gps how many sat channels how hard the wifi works triangulation etc. extern const CLLocationAccuracy kCLLocationAccuracyBestForNavigation extern const CLLocationAccuracy kCLLocationAccuracyBest..

Check user location age in Mapkit - GPS accuracy for MapKit User Location significantly better than from CLLocationManager?

http://stackoverflow.com/questions/3945742/check-user-location-age-in-mapkit-gps-accuracy-for-mapkit-user-location-signif

code for 30 60 seconds produces horizontal accuracy of 2294 meters. Pretty inaccurate but reasonable for cell tower triangulation. Looking at other apps that do reverse geocoding or location stuff like Foursquare shows a similar lack of accuracy. However..

iOS Multi-Tasking Track GPS Location

http://stackoverflow.com/questions/4400628/ios-multi-tasking-track-gps-location

the Background . Of course all these talk about all of the various ways an iOS device can get your location cell tower triangulation Skyhook style wifi network observation and GPS not exclusive GPS. In short from reading those docs add the UIBackgroundModes..

iPhone indoor location based app

http://stackoverflow.com/questions/6945780/iphone-indoor-location-based-app

an app for my work that allows clients to download the app preferably via the app store and using some sort of wifi triangulation fingerprints be able to determine their location for essentially an interactive tour. Now my question specifically is what.. us app amnh explorer id381227123 mt 8 Thank you for any clarification you can provide. iphone ios location wifi triangulation share improve this question I'm one of the developers of the AMNH Explorer app you're referencing. Explorer uses the.. Cisco wifi installation. The network itself listens for devices in the museum and estimates their position via Wifi triangulation. We do a bit of work in the app to ask the MSE for our current location. Doing this work on the network side was and still..

What do horizontalAccuracy and verticalAccuracy of a CLLocation refer to?

http://stackoverflow.com/questions/7402503/what-do-horizontalaccuracy-and-verticalaccuracy-of-a-cllocation-refer-to

could be up to 1414m off this is just an estimated error . This is probably a location determined by cell tower triangulation or WiFi location data. GPS locations usually report 100m or better. To get a higher accuracy location 300m or better you..