latitude-longitude

I have a API which returns a list of different areas within a city with the weather at that area. I want to get the nearest area based on my current location. API returns Area Latitude Longitude Weather How to find the nearest area based on this data? You would have to create CLLocation objects for all the areas, plus one for the current location of the user. Then use a loop similar to the one below to get the closest location: NSArray *allLocations; // this array contains all CLLocation objects for the locations from the API you use CLLocation *currentUserLocation; CLLocation *closestLocation

I am showing an image in an UIImageView and i'd like to convert coordinates to x/y values so i can show cities on this image. This is what i tried based on my research: CGFloat height = mapView.frame.size.height; CGFloat width = mapView.frame.size.width; int x = (int) ((width/360.0) * (180 + 8.242493)); // Mainz lon int y = (int) ((height/180.0) * (90 - 49.993615)); // Mainz lat NSLog(@"x: %i y: %i", x, y); PinView *pinView = [[PinView alloc]initPinViewWithPoint:x andY:y]; [self.view addSubview:pinView]; which gives me 167 as x and y=104 but this example should have the values x=73 and y=294.

Is there any such API where given a location (in terms of latlong), I could find whether the given point is on road/street or not. And if possible also gives me nearest street/road to that location. I found API from [Find nearby Streets] -> http://www.geonames.org/maps/us-reverse-geocoder.html#findNearbyStreets , but it just gives solution for US. Help me if u know of any better solution/algorithm. ( I am particularly interested in India.) Mathias Schwarz You can use the Google Maps Geocoding API which does exactly that: https://developers.google.com/maps/documentation/geocoding/intro Take a

I've been searching for a while now (here and on google obviously) for a neat way to convert a set of UTM coordinates to Latitude and Longitude. I've got the coordinates and I know in what zone they are, but how do I convert this to Latitude and Longitude? I Was hoping there would be some kind of class that could do at least some of the magic for me, but it doesn't seem so :( Any suggestions on this? I know it can be done, as this converter seems to work just fine Geographic/UTM Coordinate Converter . Any input is greatly appreciated! :) Thanks! Take a look at this .NET library http://projnet

I have locations in my database. A location has the attributes latitude and longitude (taken from google maps, example: 48.809591). Is there any query that could help me retrieve the locations within a range of another location? Example: I have the location A with latitude = 48.809591, and longitude = 2.124009 and want to retrieve all location objects in my database that are within 5 miles of location A My first thought was to retrieve the locations in a square where location.latitude < A.latitude + 5 miles and location.latitude > A.latitude - 5 miles and location.longitude < A.longitude + 5

i've been asked to generate some demographic reports (crime rates, birth/deaths, etc) based on state and cities for the USA. I have all the demographic data (provided by our client) but can't seem to find any places which have the boundaries (read: LAT/LONG's) of the USA States and their cities. Our data are Lat/Long points of data (eg. a crime, a birth, etc) and we want to get some mapped reports and also datamine using Sql server (we're using MS Sql 2008, but that shouldn't impact this question). So .. can anyone direct me to where there are some state and city boundary sources ? I know our