location

问题 I have some data with GPS coordinates with upto 9 decimal points. Example of this is 39.1234567891 -75.1987654321 I need to process this data to get a context of where the person is. But I want to treat the coordinates encompassed within 100m as a single location for simplicity. Can anyone point to any reference that would indicate how many decimal points I should round off to get to this level of accuracy. 回答1: 9 digits is too detailed for any but a long term geodetic app. 6 digits is in

问题 I am requesting the user location in my app. locationManager.requestAlwaysAuthorization() This line of code should return this alert message: However, I want the user to choose between "Don't Allow" and "Always Allow" only. how can I delete the "Only While Using The App" option? Knowing that this is what I included in the info.plist, and deleting any row from these 3 rows in the info.plist is causing the app not to show this alert at all. 回答1: It is not optional anymore. Since iOS 11 has been

问题 I have written an iPhone app that uses the iPhone's relative GPS location. I have a button in the user interface that does reverse geolocation (pulls the street name bases on the lat and long). The only problem is that the location object as retrieved by CLLocation *location = [[self locationManager] location]; is nil if the user taps the button too soon. I am initializing the LocationManager in viewDidLoad as I don't want to object to be created unless the user actually loads this screen. I

问题 I want to use CLLocationManager to get the current user location using GPS antenna, not the cellular network. How can I ensure that? 回答1: Your choices is either the standard location service (e.g. startUpdatingLocation , for which you can specify the desiredAccuracy ), or the low-power significant change service (e.g., startMonitoringSignificantLocationChanges ). But you generally don't specify location services based upon hardware, but rather on the basis of your app's functional needs. Use

问题 I am trying to fetch all details (specially location) available with image in phone gallery.Those will come when user click on details. So please tell me how can i do this. Refer screenshots for better understanding. Thanks in advance 回答1: you can use android's ExifInterface for doing this. This is a class for reading and writing Exif tags in a JPEG file or a RAW image file. Supported formats are: JPEG, DNG, CR2, NEF, NRW, ARW, RW2, ORF and RAF. Refer it from here Android ExifInterface 回答2:

问题 I'm trying to force nginx to process through php-fpm following urls: any url ending with .php /sitemap.xml /api/api.js I'm trying the following regex, but it does not work: location ^~ ^((.*\.php)|/sitemap.xml)+$ { 回答1: Try ... location ~ (\.php|sitemap\.xml|api/api\.js)$ { ... } 回答2: You shouldn't really be trying to force Nginx to send things to PHP. That's kind of 'the wrong way'. You should let Nginx see if the file exists and pass if it doesn't. It's understood that *.php needs to be

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Clustering Algorithm for Mapping Application I have an unordered List of locations (containing their co-ordinates). I know to use the Haversine formula to calculate the distance between two points. But solutions for clustering I've looked at say I'd need to order the list first. What is the correct ordering for locations? I want to cluster (i.e. put all locations into a single clusteredLocation object) all

问题 I have a list of a list that uses jquery toggle and slideToggle so that when items are clicked on, explanatory text slides out and the class changes on the h3. The html for the items looks like: <li><h3><a href="#" target="_blank" id="feature1" name="feature1">What do I know about javascript?</a></h3> <div class="check_list_wrap feature1">Not a lot, apparently.</div> </li> I included the jquery files and then write this in the header: <script type="text/javascript"> $(function() { $("

问题 I write a C program gets in an environment variable's name and print out it's memory address, simply use the getenv( ) function to do the job. Let's say I wanna have the address location of PATH --> ./test PATH. But when I debug that program in gdb, the memory location of that variable is different. Can you explain in detail why is there such a different? To be more exact: ./test PATH --> 0xbffffd96 debug in gdb --> 0xbffffd53 [edit] Thanks for your explanations. What I actually in question

问题 I'm trying to update my camera whenever my location changes. However, onLocationChanged is only called once. When I send a new location afterwards in my emulator, onLocationChanged is not called. I've been trying for hours now and I can't seem to fix it. public class RouteActivity extends FragmentActivity implements OnMapReadyCallback, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener { private GoogleMap mMap; ArrayList<LatLng> MarkerPoints;