distance

I'm trying to read the focus distance (distance of subject in a photo) from an Android camera. I keep getting 0 for all focus distances on my HTC Desire even when it correctly autofocuses. Here's the whole app, only works on v2.3.3 and above. ImageCapture.java package test.test; import java.io.IOException; import java.io.OutputStream; import java.text.SimpleDateFormat; import android.app.Activity; import android.content.Intent; import android.graphics.PixelFormat; import android.hardware.Camera; import android.hardware.Camera.AutoFocusCallback; import android.hardware.Camera.PictureCallback;

I have a NxM matrix and I want to compute the NxN matrix of Euclidean distances between the M points. In my problem, N is about 100,000. As I plan to use this matrix for a k-nearest neighbor algorithm, I only need to keep the k smallest distances, so the resulting NxN matrix is very sparse. This is in contrast to what comes out of dist() , for example, which would result in a dense matrix (and probably storage problems for my size N ). The packages for kNN that I've found so far ( knnflex , kknn , etc) all appear to use dense matrices. Also, the Matrix package does not offer a pairwise

I have a line with two points in latitude and longitude A: 3.222895, 101.719751 B: 3.227511, 101.724318 and 1 point C: 3.224972, 101.722932 How can I calculate minimum distance between point C and a line consists of point A and B? It will be convenient if you can provide the calculation and objective-c code too. The distance is around 89 meters (using ruler in Google Earth). Azam Thanks to mimi and this great article http://www.movable-type.co.uk/scripts/latlong.html but they don't give the whole picture. Here is a detail one. All this points are collected using Google Earth using Placemark to

I used this code but it doesnt work: Need the distance between two gps coordinates like 41.1212, 11.2323 in kilometers (Java) double d2r = (180 / Math.PI); double distance = 0; try{ double dlong = (endpoint.getLon() - startpoint.getLon()) * d2r; double dlat = (endpoint.getLat() - startpoint.getLat()) * d2r; double a = Math.pow(Math.sin(dlat / 2.0), 2) + Math.cos(startpoint.getLat() * d2r) * Math.cos(endpoint.getLat() * d2r) * Math.pow(Math.sin(dlong / 2.0), 2); double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a)); double d = 6367 * c; return d; } catch(Exception e){ e.printStackTrace(); }

I am working on app and try to get the speed and distance travelled by the user. I have used Google Play services location class to get the speed but it always returns me 0.0 value and not at all reliable. I wan accurate speed and distance travelled at real time. I have installed GPS Speedometer app on my device and its so perfect that even if i am walking then it gives me the speed. I want to get the same thing. I am confused in how to get speed, using location or using accelerometer or is there any other way to do it? My code is available on this link :- Drawing route on Google Maps using