geolocation

I'm trying to find the distance between two points (for which I've latitudes & longitudes) using the technique described here at Calculate distance between two latitude-longitude points? (Haversine formula) The codes are as below Javascript: var R = 6371; // Radius of the earth in km var dLat = (lat2-lat1).toRad(); // Javascript functions in radians var dLon = (lon2-lon1).toRad(); var a = Math.sin(dLat/2) * Math.sin(dLat/2) + Math.cos(lat1.toRad()) * Math.cos(lat2.toRad()) * Math.sin(dLon/2) * Math.sin(dLon/2); var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a)); var d = R * c; // Distance in

Does anyone know of a way, in Java, to convert an earth surface position from lat, lon to UTM (say in WGS84)? I'm currently looking at Geotools but unfortunately the solution is not obvious. No Library, No Nothing. Copy This! Using These Two Classes , You can Convert Degree(latitude/longitude) to UTM and Vice Versa! private class Deg2UTM { double Easting; double Northing; int Zone; char Letter; private Deg2UTM(double Lat,double Lon) { Zone= (int) Math.floor(Lon/6+31); if (Lat<-72) Letter='C'; else if (Lat<-64) Letter='D'; else if (Lat<-56) Letter='E'; else if (Lat<-48) Letter='F'; else if (Lat

I am looking for advice for open API or 3d party products which will help to convert an IP address to a zip code and city, to make geo-specific web site content. What I use is ip2nation: http://www.ip2nation.com It is a completely free MySQL database of IP to country mappings. They include a few sample PHP scripts at their site. I use it on my WordPress blog along with Ozh's free IP to Nation WordPress Plugin Even if you are not using WordPress, download the plugin as it will give you a good set of PHP code to access the database with. He even has a nice set of tiny country flags that you can

Supposedly, it is possible to get this from Google Maps or some such service. (US addresses only is not good enough.) Sijin The term you're looking for is geocoding and yes Google does provide this service. New V3 API : http://code.google.com/apis/maps/documentation/geocoding/ Old V2 API: http://code.google.com/apis/maps/documentation/services.html#Geocoding Tim Farley In addition to the aforementioned Google geocoding web service , there is also a competing service provided by Yahoo . In a recent project where geocoding is done with user interaction, I included support for both. The reason is

I'd like to simply retrieve device location in my Android project and in order to do so I use the play-services approach: protected synchronized void buildGoogleApiClient() { mGoogleApiClient = new GoogleApiClient.Builder( MainSearchActivity.this ) .addConnectionCallbacks(new GoogleApiClient.ConnectionCallbacks() { @Override public void onConnected( Bundle bundle ){ Location location = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient); if( location == null ){ LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, new LocationListener() {

A head scratcher for you. I am grabbing geo IP data from IPInfoDB 's API and it returns a timezone offset from UTC including DST (if currently reflected). For example, I live in EST (-5) and currently it's DST, so the geo IP API returns ( -04:00 ) as the offset. This is wonderful since DST is a freaking headache. But to my surprise, it caused another headache. I load this data in PHP to be passed via AJAX to the application. I would like to have the live local time of the IP address on the app. I have that all set perfectly, but I am going crazy trying to figure out how to set the PHP timezone

I am developing an application that gets position of the cell phone all day long in 6 and 6 minutes in a service, it works fine but sometimes the method OnLocationChanged of the Network provider listener stop to being called, and I don't know why. It for some reason stop being called, but the Provider is enable and the Lister is working, when I Enable or disable the Provider manually, onProviderEnabled and onProviderDisabled is called. It just happens with NETWORK_PROVIDER , the GPS_PROVIDER works well. Listener: LocationListener locationListenerGPS = new LocationListener() { // @Override

I have this image: http://imgur.com/99tSz.png . A map of the UK (not including Southern Ireland). I have successfully managed to get a latitude and longitude and plot it onto this map by taking the leftmost longitude and rightmost longitude of the UK and using them to work out where to put the point on the map. This is the code (for use in Processing.js but could be used as js or anything): // Size of the map int width = 538; int height = 811; // X and Y boundaries float westLong = -8.166667; float eastLong = 1.762833; float northLat = 58.666667; float southLat = 49.95; void drawPoint(float