distance

I am working on an app that has to measure the distance to an iBeacon. When a user is within a distance (1 meter) the user should be notified. It is working fine on iOS but on Android I get various results. I am using the Estimote Android SDK ( https://github.com/Estimote/Android-SDK ) and Android 4.3. Below is measurement from a Nexus 4 and a Nexus 5. The iBeacon is placed one meter away from the phone (the measurements are consistent with more samples): Nexus 4: 08-25 11:39:04.788: : Major: 27485 Accuracy: 0.36351308115918884 Power: -74 Rssi: -67 08-25 11:39:05.880: : Major: 27485 Accuracy:

I have table with data from GPS, e.g.: Latitude , Longitude , Time , UserId How to aggregate total distance in specified time frame summing all distances by all points (ordered by time) and group data by user? Thanks If you are using SQL Server, you might be interested in using the geography data type so you can request the database using the dedicated method and geographical index. The geography data type is available since SQL Server 2008, you can more information right here: http://msdn.microsoft.com/en-us/library/cc280766.aspx Once you've got the data into the geography column, you will be

I need to measure the physical distance between two places whose names are provided as strings. Since sometimes the names are written slightly differently, I was looking for a library that could help me measure the difference and then combine it with a measure of the latitude and longitude to select the correct matches. Preferred languages: Java or PHP. Any suggestions? Have a look at the Levenshtein distance . This is a way of measuring how different two strings are from one another. Hopefully I understood your question correctly; using "distance" in the same sentence as "latitude and

I am having an issue calculating distance using the Location.distanceTo method. private class MyLocationOverlay1 extends MyLocationOverlay { @Override public void drawMyLocation(Canvas canvas, MapView mapView, Location lastFix, GeoPoint myLocation, long when) super.drawMyLocation(canvas,mapView,lastFix,myLocation,when); Location bLocation = new Location("reverseGeocoded"); bLocation.setLatitude(FindList.gpslat); // Value = 3.294391E7 bLocation.setLongitude(FindList.gpslong); // Value = -9.6564615E7 Location aLocation = new Location("reverseGeocoded"); aLocation.setLatitude(myLocation

I am running R 3.2.3 on a machine with 16 GB RAM. I have a large matrix of 3,00,000 rows x 12 columns. I wanna use a hierarchical clustering algorithm in R, so before I do that, I am trying to create a distance matrix. Since data is of mixed type, I use different matrices for different type. I get an error about memory allocation: df <- as.data.frame(matrix(rnorm(36*10^5), nrow = 3*10^5)) d1=as.dist(distm(df[,c(1:2)])/10^5) d2=dist(df[,c(3:8)], method = "euclidean") d3= hamming.distance(df[,c(9:12)]%>%as.matrix(.))%>%as.dist(.) I get the following error > d1=as.dist(distm(df1[,c(1:2)])/10^5)

I am working on thumb recognition system. I need to implement KNN algorithm to classify my images. according to this , it has only 2 measurements, through which it is calculating the distance to find the nearest neighbour but in my case I have 400 images of 25 X 42, in which 200 are for training and 200 for testing. I am searching for few hours but I am not finding the way to find the distance between the points. EDIT: I have reshaped 1st 200 images in to 1 X 1050 and stored them in a matrix trainingData of 200 X 1050. similarly I made testingData . Here is an illustration code for k-nearest

I have a long list of origins and destinations in Excel, using webquery I can fill in the cities and postal code to give a webquery like: http://maps.googleapis.com/maps/api/directions/xml?origin=Scoresby&destination=Melborne&sensor=false This returns me a long XML file, but all I need is just the distance. Is there a way to extract only the distance value? Or should I just run a macro script to extract distance one by one? (Since the format remains roughly the same each time I ask the server) The short answer is XPath - well worth learning if you are going to work with any kind of XML In the

I have an user location (blue dot) and annotations on mapView . When annotation is selected, I setting text to distLabel - "Distance to point %4.0f m.". How can I update that text label when user moves? didSelectAnnotationView: - (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view { CLLocation *pinLocation = [[CLLocation alloc] initWithLatitude: [(MyAnnotation*)[view annotation] coordinate].latitude longitude: [(MyAnnotation*)[view annotation] coordinate].longitude]; CLLocation *userLocation = [[CLLocation alloc] initWithLatitude: self.mapView.userLocation