calculate distance between coordinates

Not much to say, your own code on the line, you can directly to use./** * Calculates the distance between two coordinates (m) * @param float $fP 1Lat starting point (latitude) * @param float $fP 1Lon Start (longitude) * @param float $fP 2Lat end point (latitude) * @param fl Oat $fP 2Lon Endpoint (longitude) * @return int */function distancebetween ($fP 1Lat, $fP 1Lon, $fP 2Lat, $fP 2Lon) {$fEARTH _radius =

Not much to say, your own code on the line, you can directly to use. /** * Calculates the distance between two coordinates (m) * @param float $fP 1Lat starting point (latitude) * @param float $fP 1Lon Start (longitude) * @param float $fP 2Lat end point (latitude) * @param fl Oat $fP 2Lon Endpoint (longitude) * @return int */function distancebetween ($fP 1Lat, $fP 1Lon, $fP 2Lat, $fP 2Lon) {$fEARTH _radius

= str.substring (lngend+7, Latend); AMap =NewHashmap(); theMap.put ("LNG", LNG); +Map.put ("Lat", LAT); - returnmap; $ } $ } -}Catch(Exception e) { - E.printstacktrace (); the}finally{ - Try { Wuyi In.close (); the}Catch(IOException e) { - E.printstacktrace (); Wu } - } About return NULL; $ } - - Public Static voidMain (String args[]) { - Try { Amap); +System.out.pr

This example describes how PHP calculates the distance between two coordinates (longitude, latitude). Share to everyone for your reference. Specifically as follows: Here you use PHP to calculate the distance between two coordinates (longitude, latitude), and return the resu

Define (' PI ', 3.1415926535898);d efine (' Earth_radius ', 6378.137);//calculation range, can do search user function GetRange ($lat, $lon, $raidus) {//calculate latitude $degree = (24901 * 1609)/360.0; $dpmLat = 1/$degree; $radiusLat = $dpmLat * $raidus; $minLat = $lat-$radiusLat; Get the minimum latitude $maxLat = $lat + $radiusLat; Get maximum latitude//calculate Longitude $mpdLng = $degree

Tags: Oracle stored proceduresNew Project Requirements:Combine Baidu map, specify a location in the map, get the location and information of the units stored in all databases around 1km in this location on the map. So I wrote a piece of Oracle's stored procedure, which was written purely by groping.The functions required in the background are as follows:First, calculate the ARC functionCREATE OR REPLACE FUNCTION RAD (d number) RETURN number is PI numb

! HDU 4311 minimum Manhattan distance-Thinking timing-(separated and sorted by horizontal and vertical coordinates), hdu Manhattan Question: There are n points. Start from a point in the n points and find the distance and minimum value of the Manhattan point. Analysis: Brute-force enumeration times out again. This type of question is generally considered, and mo

) + cos (', _lat, ' * PI ()/180.0) * cos (lat * pi ()/180.0) * POW (sin ((', _lng, ' * PI ()/180.0)-(LNG * PI ()/180.0))/2 ), 2)) * ', Earth_radius, ' * + ' as di from dis wherE lat between ', Minlat, ' and ', Maxlat, ' and LNG between ', MINLNG, ' and ', MAXLNG, ' ORDER by Dilimit 0,10 '); PREPARE stmt from @_sql; EXECUTE stmt; END;;D Elimiter;Call:Call DIS (_lat,_lng,_ras,@_data);Parameter description:_lat, longitude;_LNG, Latitude;_ras, radius (in km);@_data, accept returnThe return value in

Point coordinates query The ID command is used to query the coordinate values of the specified points. The call method for this command is: Toolbar: "Inquiry (query)" → Menu: "Tool (tool)" → "Inquiry (query)" → "ID point (coordinates)" Command line: ID When you use the ID command, AutoCAD gives the x, y, and z coordinate values for the specified point. Explains that the ID command can be used transpar

// calculate the distance between two coordinatesDouble Distancewithcoord (double lon1,double lat1,double lon2,double lat2){Double er = 6378137;Double RADLAT1 = pi*lat1/180.0f;Double radlat2 = pi*lat2/180.0f;Double radlong1 = pi*lon1/180.0f;Double radlong2 = pi*lon2/180.0f;if (RADLAT1 if (radlat1 > 0) radlat1 = PI/2-Fabs (RADLAT1);//Northif (radlong1 if (Radlat2 if (Radlat2 > 0) radlat2 = PI/2-Fabs (RADLAT2

), 2) + cos (', _lat, ' * PI ()/180.0) * cos (lat * pi ()/180.0) * POW (sin ((', _lng, ' * PI ()/180.0)-(LNG * PI ()/180.0))/2 ), 2)) * ', Earth_radius, ' * + ' as di from dis wherE lat between ', Minlat, ' and ', Maxlat, ' and LNG between ', MINLNG, ' and ', MAXLNG, ' ORDER by Dilimit 0,10 '); PREPARE stmt from @_sql; EXECUTE stmt; END;;D Elimiter; Call: Call DIS (_lat,_lng,_ras,@_data);Parameter description: _lat, longitude; _LNG, Latitude; _ras, radius (in km); @_data, accept return The r

", "pwd": "123456", "roles":[] }) db. Auth ( { "user": "Root", "pwd": "123456" Calculate the distance from the two-point geographic coordinatesFunction: Calculates the spherical distance between two points according to the latitude and longitude of pi and earth radius coefficients and coordinates