latitude-longitude

Using Maxmind's GeoIP software, we can narrow down the LONG/LAT of an IP address to relative accuracy within 25 miles around 80% of the time. Now, we don't want to use any of the other information provided by MaxMind, because there are a lot of discrepancies between feature names, i.e., cities, to perform a look up. We plan on attempting such a look up if other methods fail to locate a feature, but for performance reasons, look ups on floats are much faster than strings. Now, I'm a little clueless on how we can find the closest matching LAT/LONG given from Maxmind to our database. The problem

I am looking to calculate and give the distance between two sets of Lat and Long for travel on Road. I have had a look at the Google's Directions and Distance Matrix API. And also done a lot of other questions on SO. But i am not able to figure out the best possible way to do it, you need to calculate the distance to around 20-25 locations at each time. We are building a travel app that requires this information for the user on Android device from where he is. If You are looking for driving distance NOT shortest distance then You can try to call API service with URL like: http://maps

How to find the nearest 100 meters latitude and longitude depending upon the current location, i have created a database in SQLITE3 which consists of set of latitudes and longitudes and corresponding there location name. Depending upon the current location i want to fetch the nearest 100 meters latitude and longitude in objective C, I am using the following code to get the Current location, - (void)viewDidLoad { [super viewDidLoad]; databaseName = @"searchdata.sql"; NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentDir =

I've got an sqlite db with long and lat of shops and I want to find out the closest 5 shops. So the following code works fine. if(sqlite3_prepare_v2(db, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK) { while (sqlite3_step(compiledStatement) == SQLITE_ROW) { NSString *branchStr = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 0)]; NSNumber *fLat = [NSNumber numberWithFloat:(float)sqlite3_column_double(compiledStatement, 1)]; NSNumber *fLong = [NSNumber numberWithFloat:(float)sqlite3_column_double(compiledStatement, 2)]; NSLog(@"Address %@, Lat = %@,

How to get latitude and longitude information from picture store in device or SD Card? Mohit Kanada I found very simple solution for this question....So I posted it here to help my friends who have problem like me to get Geo location from Picture. Bundle bundle = getIntent().getExtras(); if(null != bundle) { String filepath = bundle.getString(FILE_PATH_KEY); try { ExifInterface exif = new ExifInterface(filepath); StringBuilder builder = new StringBuilder(); builder.append("Date & Time: " + getExifTag(exif,ExifInterface.TAG_DATETIME) + "\n\n"); builder.append("Flash: " + getExifTag(exif

Does anyone know if there is a tool in R to find the height above sea level of a location, given the latitude and longitude ? Or you can use the package that looks up from geonames, and get the value from the srtm3 digital elevation model: > require(geonames) > GNsrtm3(54.481084,-3.220625) srtm3 lng lat 1 797 -3.220625 54.48108 or the gtopo30 model: > GNgtopo30(54.481084,-3.220625) gtopo30 lng lat 1 520 -3.220625 54.48108 geonames is on CRAN so install.packages("geonames") will get it. The difference between these two models is because they are only approximations based on satellite data. Don

I have know my current position({lat:x,lon:y}) and I know my speed and direction angle; How to predict next position at next time? First, calculate the distance you will travel based on your current speed and your known time interval ("next time"): distance = speed * time Then you can use this formula to calculate your new position (lat2/lon2): lat2 =asin(sin(lat1)*cos(d)+cos(lat1)*sin(d)*cos(tc)) dlon=atan2(sin(tc)*sin(d)*cos(lat1),cos(d)-sin(lat1)*sin(lat2)) lon2=mod( lon1-dlon +pi,2*pi )-pi For an implementation in Javascript, see the function LatLon.prototype.destinationPoint on this page

This question already has an answer here: How to get a time zone from a location using latitude and longitude coordinates? 14 answers I am trying to get the time zones for latitude and longitude coordinates but am having a few problems The mistakes are probably very basic I have a table in a database with around 600 rows. Each row contains a lat long coordinate for somewhere in the world I want to feed these co-ordinates into a function and then retrieve the time zone. The aim being to convert events which have a local time stamp within each of these 600 places into UTC time I found a blog

I'm trying to find a webservice that will allow me to get a County name (not Country) for a specific Lat/Long. I would be performing the lookup within a server application (likely a Java application). It doesn't have a be a webservice if there is some library out there I suppose, but I would like up-to-date information. I have looked around quite a bit for an API that supports this, but so far I haven't been able to find one that works. I have tried the Yahoo APIs like so: http://where.yahooapis.com/geocode?q=39.76144296429947,%20-104.8011589050293 But it doesn't populate the address