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This example describes the PHP method for calculating the maximum minimum latitude and longitude of 4 corners in the current coordinates of 3 km. Share to everyone for your reference, as follows: $LNG, $lat latitude and longitude $half = 6371; $distance = 3; 3 km $DLNG = 2 * ASIN (SIN ($distance/(2 * $half))/cos (Deg2rad ($lat))); $DLNG = Rad2deg ($DLNG); $dlat = $distance/$half; $dla

This article describes how to calculate the distance between two points based on the latitude and longitude of python. For more information, see The code is as follows: /*** Calculate the distance between two points* @ Param _ lat1-start latitude* @ Param _ lon1-start longitude* @ Param _ lat2-end latitude* @ Param _ lon2-end longitude* @ Return km (rounding

: This article describes how to use PHP to calculate the maximum, minimum, and latitude of the four corners within 3 kilometers of the current coordinate. if you are interested in the PHP Tutorial, refer to it. This article describes how PHP calculates the maximum, minimum, latitude, and longitude of the four corners within 3 kilometers of the current coordinate. We will share this with you for your referen

function Getgreatcircledistance (lat1,lng1,lat2,lng2) {if (!LAT1 | |!lng1 | |!lat2 | |!lng2) {return-1;} var v = 0; var radLat1 = Getrad (LAT1); var radLat2 = Getrad (LAT2); var a = RADLAT1-RADLAT2; var B = Getrad (lng1)-Getrad (LNG2); var s = 2*math.asin (Math.sqrt (Math.pow (Math.sin (A/2), 2) +Math.Cos (RADLAT1) *math.cos (RADLAT2) *math.pow (Math.sin (B/2), 2)); s = S*earth_radius; s = Math.Round (s); if (sv = s.tofixed (0) + ' m '; } else{s = s/1000;v = s.tofixed (1) + ' km '; } retu

Mainactivity as follows:Package Cc.bb;import Java.util.iterator;import Java.util.list;import android.location.location;import Android.location.locationlistener;import Android.location.locationmanager;import Android.os.Bundle;import Android.widget.textview;import Android.app.activity;import android.content.context;/** * Demo Description: * positioning function with Locationmanager * 1 real-time update of longitude, Latitude * 2 get geographic informati

The first few days of contact with a longitude and latitude computing distance algorithm, very concise Oh. When the Zennai is in operation, it reports the result of the wrong type. Later, after analysis, the problem was found in 13 lines in the code below. / * Calculation of two GPS points straight distance result unit: M3 */4 Public Static DoubleDistanceDoubleJINGDU1,DoubleWEIDU1,5 DoubleJINGDU2,Doubleweidu2) {6 Do

Google and Baidu use different latitude and longitude projection methods. Therefore, it is very troublesome to use Google Maps to query standard longitude and latitude and then convert them to a hundred degrees. However, Baidu has launched a small tool to easily obtain the latitude and longitude of a Baidu map at a certain point on the map. That is, Baidu map

Scalar functions: View code Create Function DBO. fn_getdistance (@ lngbegin real, @ latbegin real, @ lngend real, @ latend real) returns float as begin declare @ distance real declare @ earth_radius real set @ earth_radius = 6378.137 -- The earth's radius is already divided by 1000, so the following calculated values are kilometers and kilometers declare @ radlatbegin real, @ radlatend real, @ radlatdiff real, @ radlngdiff real set @ radlatbegin. = @ Latbegin * Pi ()/ 180.0 Set @ radlate

Recent projects need to use the positioning function, and to obtain the latitude and longitude of the current location, consult the data to organize the following code: function Locationposition () {var geolocation = new Bmap.geolocation ();Geolocation.getcurrentposition (function (r) {var city_lat = r.latitude;var city_lng = r.longitude;Cookies.set ("Save_city_latitude", City_lat);Cookies.set ("Save_city_longitude", CITY_LNG);Console.log (City_lat);

For example: Longitude: 10.123456 Latitude: 20.654321Get to the actual location according to the above coordinates (do not use Baidu map or the API of the map of Gao de)The code is as follows:Put it in latitude and longitude. Publicstringgetaddress (doublelatitude,doublelongitude) { geocodergeocoder=newgeocoder (this, Locale.getdefault ());try{ ListThis article is from the "Mobile Platform Development" blog

1.geopy Package Download location https://pypi.python.org/pypi/geopy2. Installation StepsRun cmd, switch to d:/python/geopy-1.11.0/directory (modified according to your own extracted directory and download version number), CD d:/python//geopy-1.11.0 Run command: setup.py build SE tup.py Installthen in the geopy-1.11.0 directory there is a geopy folder to copy this folder to the D:/python directory3. Method 1addresses=open (' C:\Users\Yilin.Wei\Documents\HR\cities6.txt ') from geopy.geocoders Imp

Because the Baidu map api,2.0+ and 3.0+ changes relatively big, API basically was completely changed, some students may 2.0+ API use is very familiar with, but update to 3.0+, but will encounter some small trouble (because the API has changed, you need to re-learn its API, the code will be re-written , which is more painful than egg). So here are some small examples, I hope to upgrade to the 3.0+ of the students have some help.1. How does the Baidu map API map move to the specified

This example describes how PHP calculates the distance between two coordinates (longitude, latitude). Share to everyone for your reference. Specific as follows:Here we use PHP to calculate the distance between two coordinates (longitude, latitude) and return the result to meters or kilometers.function distance($lat1, $lng1, $lat2, $lng2, $miles = true){$pi80 = M_PI / 180;$lat1 *= $pi80;$lng1 *= $pi80;$lat2

At a very young age, the teacher told us that any place on earth could be determined by latitude and longitude. The warp and weft are also marked on the paper map. When you use the Baidu map, you will see the warp and weft? Will you pay attention to the coordinates of a place, latitude and longitude? This article tells you how to display a place on the Baidu map of lati