latitude rugged

To achieve the goal: the Baidu map latitude and longitude conversion to the Tencent map/google corresponding latitude and longitude degree. Method 1: Use code to convert The problem: After the conversion, the error is large, basically not available public static void convert_bd09_to_gcj02 (double lat, double LNG) { double x_pi = Math. PI * 3000.0/180.0; Double x = lng-0.0065, y = lat-0

Label:According to the current coordinate point is also the latitude and longitude, to find the database near 5 kilometers or 10 kilometers near the realization of all the information, after looking for information, the original is I sophomore learn, is to seek the chord length, mathematics forget, did not think mathematics is so useful, mathematics ah is really use too big.Use of what cosine, angle, radian all forget, but by looking for information,

1 protected void runtest () throws throwable {2 3 try {4 baidulocation BL = new baidulocation (); 5 BL. gpsx = 120; // longitude 6 BL. gpsy = 30; // latitude 7 getbaidulocation (BL); 8 If (BL. OK) {9 int baidux = (INT) (BL. baidux * 1e6); 10 int baiduy = (INT) (BL. baiduy * 1e6); 11 // The conversion is successful. The coordinates are 12} 13 else {14 // Conversion failed 15} 16} 17 catch (exception ex) {18} 19} 20 21 class baidulocation {22 public flo

Ios inputs the address to obtain the latitude and longitude, and ios gets the latitude and longitudeIos input address to obtain latitude and longitude CLGeocoder * myGeocoder = [[CLGeocoderalloc] init]; [MyGeocoder geocodeAddressString: _ searchBar. textcompletionHandler: ^ (NSArray * placemarks, NSError * error ){ If ([placemarkscount]> 0 error = nil ){ CLP

Label:The formula is as follows, Unit meter: 1th Latitude: lng1 lat1 2nd latitude and Longitude: lng2 lat2 round (6378.138*2*asin (POW (sqrt (LAT1*PI ()/180-lat2*pi ()/180)/2), 2) + Cos (LAT1*PI ()/180) *cos (LAT2*PI ()/180) *Pow (Sin ((Lng1*pi ()/180-lng2*pi ()/180)/2), 2)) *1000)For example: SELECT Store_id,lng,lat, ROUND (6378.138*2*asin (SQRT (POW (22.299439*pi ()/180-lat*pi ()/180)/2), 2) +cos (22.2994

Baidu map api obtains latitude and longitude and city names, and map api obtains latitude and longitudeTo integrate Baidu API positioning, follow these steps: 1. Register a developer2: Apply for key3: Download the jar package4: Code integration first look at the effect:1: it is best to apply for a registered developer in advance. The review takes 1 or 2 days.2: I used Android Studio to apply for the key, so

Android practice-Location-Based Services (get the longitude and latitude of your location + Baidu map) and android longitude and latitude The LocationManager class must be used for implementation. The following code is used: The. java code is as follows: Package org. lxh. demo; import java. util. list; import android. app. activity; import android. content. context; import android. location. location; impo

PHP calculates the Distance Based on the longitude and latitude between two points, and php calculates the longitude and latitude of two points. This is a good example. paste the code to know the latitude value and longitude value first. /*** @ Desc calculate the distance * @ param float $ lat latitude value * @ param

Java Baidu map latitude and longitude correction, java latitude and longitude correction In China, the longitude and latitude obtained by using electronic maps are not real longitude and latitude, but an offset is added to the real latitude and longitude through some algorit

Front-end latitude and longitude: positioning page elements and front-end latitude and longitude Recently, I was working on a company project and encountered the problem of html page element locating. For more information, see Mark. 1) You can use the position attribute of css to implement this function. 2) The code implementation is as follows (Can you run http://www.w3school.com.cn/tiy/t.asp? F = cs