geolocation

As the title says, how to randomly select a coordinate on the surface of the Earth without bias? The simple solution of doing rand(-90,90),rand(-180,180) will favor polar regions over equatorial regions. It sounds like you're looking for a uniform random distribution on a sphere . In spherical coordinates: θ = 2π * rand(0,1) Φ = arccos(1 - 2*rand(0,1)) Archimedes proved a nifty theorem that the area of a region on a sphere is equal to the area of the horizontal projection of that region onto the curved face of a circumscribing cylinder (and hence in particular, the area of the whole sphere is

I am looking for a format of the location data used by the Windowws Phone Emulator Additional Tools. On the tab "Location" there is an option to save/open recorder data. I ask this question because I need simulate geo position change but Location Tab doesn't work for me. As a workaround I am going to create a file of the location data and open it in the emulator. It's a simple XML file in this format: <?xml version="1.0" encoding="utf-8"?> <WindowsPhoneEmulator xmlns="http://schemas.microsoft.com/WindowsPhoneEmulator/2009/08/SensorData"> <SensorData> <Header version="1" /> <GpsData latitude=""

How to get the distance of our mobile device from a wifi hotspot kept inside a building? This is basically for navigational purposes inside the building.. Any help would be appreciated. If you want to use WiFi for indoor location (step 1 before navigation), then distance to the WiFi Access Points is not the correct approach. Instead use RSSI . With Android you would need to take WiFi fingerprint of a building by moving around every few meters and sample the RSSI strength . You need to provide a user interface that lets the user manually specify on an image of the building (e.g. a CAD drawing).

I have 44,000 US Zip codes and it's corresponding centroid lat/long in R. This is from the package 'zipcode' in R. I need to calculate the distance between each zipcode and keep those distances that are less than 5 miles. The problem is to calculate all distances between the zipcodes I have to create a vector of size 44,000x44,0000 which I can't due to space issues. I checked through the posts in R, the closest to my requirement is one that spits out the minimum distance between 2 datasets with lat/long DB1 <- data.frame(location_id=1:7000,LATITUDE=runif(7000,min = -90,max = 90),LONGITUDE

I need to get the device's current geographical location. Scenario : if I am in US ..: my device location should be US Same as in the case, when I am in UK : my device location should be UK I need the sample code for finding this geographical location. (location determined by Network Location Provider ) Craigy If you want to get the current country code, you want to look into Geocoder which you can use to get an Address which provides a getCountryCode method. Something like this Geocoder geocoder = new Geocoder(this); List<Address> addresses = null; try { addresses = geocoder.getFromLocation(

I’m working on the iOS version of my phonegap-based navigation app. My app tracks the user’s location around a walk route using GPS and alerts the user using audio (navigator.notification.beep) and tactile (navigator.notification.vibrate) feedback when they reach a location at which there’s new instructions for them to follow. When my app is running in the foreground, both the audible beep and the vibration fire on reaching the geographic location but when the app is paused in the background, either by pressing the power button to turn the screen off or pressing the home button to return to

Currently I am saving and image with the following method in "saved photos album". UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), nil); Now I want to associate the current latitude and longitude with that image. How can I do so ? Can I do with its mediaInfo dictionary (metadata). I am working in ios sdk 3.0 . Please tell me How to get /set geo data with an image in UIImageViewPickerController AFAIK this is not supported in iOS 4.0 and lower. As of iOS 4.1, you can use -[ALAssetsLibrary writeImageToSavedPhotosAlbum:metadata:completionBlock:]