latitude-longitude

I have a CLLocation defined, and I'd like to move that point x meters to the east and y meters to the south. How may I achieve that? There is a C function that is close to what you are asking but it takes a bearing and distance. It's in my UtilitiesGeo class on github . You would pass the latitude and longitude from your CLLocation to it and then create a new CLLocation from the resulting lat2 and lon2 that it returns: /*------------------------------------------------------------------------- * Given a starting lat/lon point on earth, distance (in meters) * and bearing, calculates destination

If i have a jpeg map with size sizeX, sizeY and some calibration points on the map (X, Y, Lon, Lat) What would be the algorithm for calculating the corresponding XY point in the map with a given Longitude / Latitude pair? Here's what worked for me, without so much bs. int x = (int) ((MAP_WIDTH/360.0) * (180 + lon)); int y = (int) ((MAP_HEIGHT/180.0) * (90 - lat)); The lat,lon coordinates were given to me by Android devices. So they should be in the same standard used by all Google Earth/Map products. If using the Equidistant Cylindrical Projection type map , here is what you need to do: Find

I have a textbox in my page which gets a location name and button with text getLat&Long . Now on clicking my button I have to show an alert of latitude and longitude of the location in the textbox. Any suggestion? You can use the Google Geocoder service in the Google Maps API to convert from your location name to a latitude and longitude. So you need some code like: var geocoder = new google.maps.Geocoder(); var address = document.getElementById("address").value; geocoder.geocode( { 'address': address}, function(results, status) { if (status == google.maps.GeocoderStatus.OK) { // do something

I've got the following information: There exists a sphere with origin (0,0,0) and radius R. After doing a ray-sphere intersection I know a point (XYZ) in 3D space that is on the sphere (the exact position in 3D space where the line pierces the sphere hull). For my program I'd like to calculate the Latitude and Longitude of the XYZ point on the sphere, but I can't think (or Google) up a way to do this easily. So in short, the function that I'm trying to write is this: public static LatLon FromVector3(Vector3 position, float sphereRadius) { return Latitude and Longitude } Does anybody know how

I'm designing a table in SQL Server 2008 that will store a list of users and a Google Maps co-ordinate (longitude & latitude). Will I need two fields, or can it be done with 1? What's the best (or most common) data-type to use for storing this kind of data? Craig Bovis Take a look at the new Spatial data-types that were introduced in SQL Server 2008. They are designed for this kind of task and make indexing and querying much easier and more efficient. More information: MS TechNet: SQL Server 2008 Spatial Data Types , MSDN: Working with Spatial Data (Database Engine) . dan90266 Fair Warning!