latitude-longitude

I am working on a project in javascript involving google maps. The goal is to figure out 16-20 coordinate points within n kilometers from a set of latitude longitude coordinates such that the 16 points if connected will form a circle around the original coordinates. The end goal is to make it so I can figure out coordinates to plot and connect on google maps to make a circle around a given set of coordinates. The code would go something like: var coordinates = Array(); function findCoordinates(lat, long, range) { } coordinates = findCoordinates(-20, 40, 3); Now to make the magic happen in the

I'm pretty confused. I have a point: x= -12669114.702301 y= 5561132.6760608 That I got from drawing a square on a vector layer with the DrawFeature controller. The numbers seem...erm...awfull large, but they seem to work, because if I later draw a square with all the same points, it's in the same position, so I figure they have to be right. The problem is when I try to convert this point to latitude and longitude. I'm using: map.getLonLatFromPixel(pointToPixel(points[0])); Where points[0] is a geometry Point, and the pointToPixel function takes any point and turns it into a pixel (since the

I am having following JSON array of 6 locations. Is there any way sort these based on longitude and latitude where nearby locations come next in the array? [ {"id" : 279, "longitude":79.853239,"latitude":6.912283}, {"id" : 284, "longitude":79.865699,"latitude":6.885697}, {"id" : 13, "longitude":79.851187,"latitude":6.912220}, {"id" : 282, "longitude":79.858904,"latitude":6.871041}, {"id" : 281, "longitude":79.853346,"latitude":6.899757}, {"id" : 16, "longitude":79.854786,"latitude":6.894039} ] Sorting can be started from first item and result should be something like this [ {"id" : 279,

I have a "Place" object with a LatLng coordinate for each: import com.google.android.gms.maps.model.LatLng; public class Place{ public String name; public LatLng latlng; public Restaurant(String name, LatLng latlng) { this.name = name; this.latlng = latlng; } } and I have an ArrayList of these Places, something like this: ArrayList<Place> places = new ArrayList<Place>(); places.add("Place 1", LatLng(90.0,90.0)); places.add("Place 2", LatLng(93.0,93.0)); places.add("Place 3", LatLng(83.0,92.0)); places.add("Place 4", LatLng(93.0,91.0)); and I have "my" LatLng: LatLng myLocation = new LatLng(10

Which is better for calculating the distance between two latitude/longitude points, The Haversine Formula or The Vincenty's Formula? Why? The distance is obviously being calculated on Earth. Does WGS84 vs GCJ02 coordinates impact the calculation or distance (The Vincenty's formula takes the WGS84 axis into consideration)? For example, in Android, the Haversine Formula is used in Google Map Utils , but the Vincenty Formula is used by the android.Location object ( Location.distanceBetween() ). Haversine is a simpler computation but it does not provide the high accuracy Vincenty offers. Vincenty

I have a longitude and latitude as a string in PHP like below 49.648881 -103.575312 And I want to take that and look in an array of values to find the closest one. The array looks like array( '0'=>array('item1','otheritem1details....','55.645645','-42.5323'), '1'=>array('item1','otheritem1details....','100.645645','-402.5323') ); I want to return the array that has the closest long and lad. In this case it would be the first one (and yes I know -400 is not a a possible value). Is there any quick and easy way to do this? I tried array searching but that didn't work. Difference code function

I have a WCF service in C#. In the Service call client sends a city name. I want to convert the city name to latitudes and longitudes and store in Database under demographics. I am planning to use Google API to implement above functionality. I have obtained an API key from Google and its of type 'Service account'. How can I obtain the latitude and longitude using which APIs? Do I need to install some SDK or any REST Service will do? If you want to use the Google Maps API have a look at their REST API, you don't need to install a Google Maps API just send a Request like http://maps.googleapis