gps | 易学教程

Android gps定位

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我去，好久对没来os来了编辑器都有三种风格了，这愉快的周末即将开始，下午了，来个gps是如何定位的，Android版本的，ios的请绕走。首先还是需要引入你的权限，在AndroidManifest.xml里加上这几个  <uses-permission android:name="android.permission.INTERNET"/> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 权限都加上了，看看我的activity package********* import*********** public class LocationActivity extends Activity { private String TAG = "LocationActivity"; private LocationManager locationManager; @Override public void onCreate(Bundle

How to validate latitude and longitude

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来源： https://stackoverflow.com/questions/7780981/how-to-validate-latitude-and-longitude

How to validate latitude and longitude

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来源： https://stackoverflow.com/questions/7780981/how-to-validate-latitude-and-longitude

How to validate latitude and longitude

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来源： https://stackoverflow.com/questions/7780981/how-to-validate-latitude-and-longitude

How to validate latitude and longitude

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来源： https://stackoverflow.com/questions/7780981/how-to-validate-latitude-and-longitude

Using std::chrono / date::gps_clock for converting a double gps timestamp to utc/tai

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问题 I get a timestamp from a GPS device in a gps_data struct as a double. I'd like to convert this GPS timestamp to UTC and TAI times, something simple as: void handle_gps_timestamp(double timestamp) { double utc = utc_from_gps(timestamp); double tai = tai_from_gps(timestamp); do_stuff(gps, utc, tai); } Luckily I found Howard Hinnant's date and timezone library (proposed for C++20) that seems to provide this exact functionality. Unfortunately, at least from what I can see, the date/tz/chrono

Android: calculate vehicle moving distance using mobile device

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问题 Using GPS points I am calculating by holding previous and current points with location1.distanceTo(location2) by adding each time to a variable on some time diff to get traveled distance. Is it good approach to get vehicle movement distance? Is any better approach to get accurate travel distance during moving vehicle? 回答1: Use the following code. I hope it will help. public double CalculationByDistance(LatLng StartP, LatLng EndP) { int Radius = 6371;// radius of earth in Km double lat1 =

Android: calculate vehicle moving distance using mobile device

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Android: calculate vehicle moving distance using mobile device

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How to compute pseudorange from the parameters fetched via Google GNSSLogger?

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问题 The official GNSS raw measurements fetched via GNSS logger app provides the following parameters : TimeNanos LeapSecond TimeUncertaintyNanos FullBiasNanos BiasNanos BiasUncertaintyNanos DriftNanosPerSecond DriftUncertaintyNanosPerSecond HardwareClockDiscontinuityCount Svid TimeOffsetNanos State ReceivedSvTimeNanos ReceivedSvTimeUncertaintyNanos Cn0DbHz PseudorangeRateMetersPerSecond PseudorangeRateUncertaintyMetersPerSecond I'm looking for the raw pseudorange measurements PR from the above