P0(lat0,lon0) : initial position (unit : degrees) dx,dy : random offsets from your initial position in meters You can use an approximation to compute the position of the randomized position: lat = lat0 + (180/pi)*(dy/6378137) lon = lon0 + (180/pi)*(dx/6378137)/cos(lat0) This is quite precise as long as the random distance offset is below 10-100 km … Read more
Some iOS devices have a real GPS chip allowing you to get location data even with no Internet connection. I believe the last few iPhones all have GPS. Some of the iPad models have GPS. I don’t believe any of the iPod touch models have GPS. Obviously without Internet you can’t show any map data … Read more
GPS time started in sync with UTC: 1980-01-06 (UTC) == 1980-01-06 (GPS). Both tick in SI seconds. The difference between GPS time and UTC time increases with each (intercalary) leap second. To find the correct UTC time, you need to know the number of leap seconds occurred before the given GPS time: #!/usr/bin/env python from … Read more
As of today, the W3C Geolocation API (widely associated with, though not technically part of, HTML 5) is support in the following major desktop browsers: Firefox (since 3.5) Safari (since 5.0) Google Chrome (version depends on OS) Opera (since 10.60) Internet Explorer (since IE 9) There are at least two mobile browsers that implement the … Read more
No exact solution exists There is no isometric map from the sphere to the plane. When you convert lat/lon coordinates from the sphere to x/y coordinates in the plane, you cannot hope that all lengths will be preserved by this operation. You have to accept some kind of deformation. Many different map projections do exist, … Read more
As others have said, you do not need internet for GPS. GPS is basically a satellite based positioning system that is designed to calculate geographic coordinates based on timing information received from multiple satellites in the GPS constellation. GPS has a relatively slow time to first fix (TTFF), and from a cold start (meaning without … Read more
Try Following Code LocationManager locationManager = (LocationManager) getActivity() .getSystemService(Context.LOCATION_SERVICE); String locationProvider = LocationManager.NETWORK_PROVIDER; Location lastlocation = locationManager.getLastKnownLocation(locationProvider); String CurLat = String.valueOf(lastlocation.getLatitude()); String Curlongi= String.valueOf(lastlocation.getLongitude());
From what is specified[difference of 4-5 blocks], you may be obtaining the location from networkProvider only. With this gpsTracker code mentioned in the question, there are a few modifications required, instead of using the code as it is: 1. There are 2 if loops which verify the source of location is enabled or not and … Read more
Why don’t you use CLLocations distanceFromLocation: method? It will tell you the precise distance between the receiver and another CLLocation. CLLocation *locationA = [[CLLocation alloc] initWithLatitude:12.123456 longitude:12.123456]; CLLocation *locationB = [[CLLocation alloc] initWithLatitude:21.654321 longitude:21.654321]; CLLocationDistance distanceInMeters = [locationA distanceFromLocation:locationB]; // CLLocation is aka double [locationA release]; [locationB release]; It’s as easy as that.
Recently I had an idea to use Google Maps website from Browser.Field but it’s not possible since GMaps are based on JavaScript and it’s badly supported by Blackberry native Browser. Actually there are 2 ways of using Google Maps on Blackberry: install Google Maps Mobile application (see example of use) use Google Static Maps API … Read more