When doing the project, encountered the location to obtain the corresponding latitude and longitude in the map, make notes, for future direct usePackage Com.hpzx.data;import Java.io.bufferedreader;import Java.io.ioexception;import java.io.InputStreamReader; Import Java.io.unsupportedencodingexception;import Java.net.malformedurlexception;import Java.net.URL;import Java.net.urlconnection;import com.hpzx.json.httptokener;import com.hpzx.json.jsonexcepti
); Setcontentview (R.layout.activity_main); Mlocationclient = new Locationclient (Getapplicationcontext ());//Declaration Locationclient Class Mlocationclient.registerlocation Listener (MyListener);//Register the Listener function locationclientoption option = new Locationclientoption ();//Set Request parameters Option.setlo Cationmode (LocationClientOption.LocationMode.Hight_Accuracy);//Set positioning mode Option.setcoortype ("Bd09ll");// The returned positioning result is Baidu
Latitude
Longpolling longitude
Calculate the two-point distance function based on the longitude and latitude in the Google Maps script.
Private const double earth_radius = 6378.137;Private Static double rad (double D){Return D * Math. PI/180.0;}
Public static double getdistance (double LAT1, double lng1, double LAT2, double lng2){Double radlat1 = rad (LAT1 );Double radlat2 = rad (LAT2 );Double A = radla
Because of the Baidu map service, a longitude and latitude are required for map initialization, but the scheme for obtaining a city Longitude Latitude is not displayed.
The first method can be set in emulator control in Eclipse's DDMS, such asThe other is in cmd input telnet localhost 5554 (note: 5554 is the emulator in the port of the machine, there may not be the same ha, the specific port number, the emulator is shown on the top left), this will appear Android Console:type ' help ' for a The words of the list of Commandsok. If the prompt command is not valid, you need to turn Windows features on or off in your computer's control panel---and then check the Te
Use the Baidu map api to query the longitude and latitude Based on the address and the api address
Copy codeThe Code is as follows:URL to be queried: Query result (longitude and latitude): Style = "position: absolute;Margin-top: 30px;Width: 730px;Height: 590px;Top: 50;Border: 1px solid gray;Overflow: hidden; ">
The above is all the content of the code. You can use it directly in the project. You don't have
Using JS to calculate the distance between two points on the earth based on latitude and longitudeRecently, we used the formula for calculating the distance between two points on the earth's surface based on latitude and longitude, and then implemented it using JS.There are two ways to calculate the distance between two points on the Earth's surface.FirstBy default, The Earth is a smooth sphere, and The Dis
Android provides locationmanager to get location, use Locationlistener to listen for changes in locationDo some initialization work first:/** latitude and longitude of current location*/public static string mLat = "";p ublic static string Mlon = "",/** Time Out For the GPS location update */private Timer Mgpstimer = new timer (),/** TimerTask for Time out of the GPS location update */p Rivate gpstimeouttask mgpstimeouttask = new Gpstimeouttask ();/*
Method One:Using Geopy Package: https://github.com/geopy/geopy (only accurate to town, concrete streets no results returned) from Import Nominatim # using geopy queries def Geocoden (address): GPS=nominatim () location =Gps.geocode (address) return Location.longitude,location.latitudeMethod Two:Use the Api,key map or Baidu map to apply for replacement on the official website.ImportRequests#using the high-de APIdefgeocodeg (address): par= {'Address': Address,'Key':'cb649a25c1f81c1451adb
Use NodeJS to implement the interface for batch query of geographical locations by longitude and latitude.
Steps
1. query interface
There are still many such types of interfaces on the website. I have directly called Baidu map's interface. The interface documentation calls the Geocoding API's geographic code service.
Request example: Perform geographic code query on Baidu building in Beijing
Http://api.map.baidu.com/geocoder/v2? Ak = e4805d16520de693a
The calculation formula from Google Maps:Called by various methods of the math class in Java. Implement the above formulaprivate static Double Earth_radius = 6378.137;//unit kilometer/** * Angular radian Calculation formula RAD: (). Calculation of latitude and longitude distance between Hefei and Hangzhoupublic static void Main (String ar[]) {getdistance (31.86, 117.27, 30.26, 120.19);}330518 mVerify that it is correct. Calculation of linear distance
Tag: IDT This SAR stat cat ble pre Height objectFirst to register Baidu map API.1, login Baidu map open platform http://lbsyun.baidu.comTo register an account, complete the information, click on the "API console" in the top right corner of the website, click and create the app.Application type selection: "Browser side", app service Select all, referer Whitelist: *Click Submit. An Access application (AK) is generated.AK code down, on the back of the page to use it to elicit Baidu map.2. Create HT
PublicClassDistance{PrivateStaticFinalDoubleEarth_radius = 6378137;PrivateStaticDoubleradDoubleD{ReturnD * math.pi/180.0;} /*** According to latitude and longitude coordinates between two points (Double value) to calculate the distance between two points in meters*@paramLng1*@paramLat1*@paramLng2*@paramLat2*@return*/PublicStaticDoubleGetdistance (DoubleLng1,DoubleLAT1,DoubleLng2,DoubleLAT2){DoubleRADLAT1 = Rad (LAT1);DoubleRadLat2 = Rad (LAT2);DoubleA
Baidu Map Mobile version of the API contains not only the basic construction map interface, but also integrated a number of search services, including: Location search, peripheral search, range Search, public transport search, ride search, walking search, address information inquiries.
Baidu Map Mobile API provides the search service is mainly through the initialization of the Mksearch class, register the search results of the listening object Mksearchlistener to implement the asynchr
JS to obtain a latitude and longitude implementation method
Above this JS to obtain the latitude and longitude of the implementation method is a small series to share all the content, hope to give you a reference, but also hope that we support the cloud habitat community.
Objective
Recently due to the need for work, need to extract some of the city's latitude and longitude coordinates, a little search, and found that Baidu map and the gold map have provided relevant functions and examples. Then the rest of the work is relatively simple, save the coordinates, and then converted to WGS coordinates, so as to match the existing GPS data and maps.
Main problems and Solutions
Save files locally support across browsers
Fo
This is a good example, directly affixed to the code, first of all to know the latitude value, longitude value
/**
* @desc calculates the distance * @param float $lat latitude value based on the longitude of two points *
@param float $lng Longitude value *
/function getdistance ($la T1, $LNG 1, $lat 2, $lng 2)
{
$earthRadius = 6367000;//approximate radius of Earth in meters/
*
Convert thes e de
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