CLGeocoder reverseGeocodeLocation not able to product consisent result - iphone

I am not able to get same result from CLGeocoder reverseGeocodeLocation for two different coordinate system.
for eg.
CLLocation *tempLocation = [[CLLocation alloc] initWithLatitude:37.785834 longitude:-122.406417]; // coordinate for apple head quater
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
[geocoder reverseGeocodeLocation:tempLocation completionHandler:
^(NSArray* placemarks, NSError* error){
if ([placemarks count] > 0)
{
CLPlacemark *placemark = [placemarks objectAtIndex:0];
NSLog(#" %#",placemark.addressDictionary);
}
}];
output :
City = "San Francisco";
Country = "United States";
CountryCode = US;
FormattedAddressLines = (
"Apple Store, San Francisco",
"1 Stockton St",
"San Francisco, CA 94108-5805",
"United States"
);
Name = "Apple Store, San Francisco";
PostCodeExtension = 5805;
State = California;
Street = "1 Stockton St";
SubAdministrativeArea = "San Francisco";
SubLocality = "Union Square";
SubThoroughfare = 1;
Thoroughfare = "Stockton St";
ZIP = 94108;
But when I use
CLLocation tempLocation = [[CLLocation alloc] initWithLatitude:27.672654 longitude:85.313744];
///CLLocation *tempLocation = [[CLLocation alloc] initWithLatitude:37.785834 longitude:-122.406417];
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
[geocoder reverseGeocodeLocation:tempLocation completionHandler:
^(NSArray placemarks, NSError* error) {
if ([placemarks count] > 0) {
CLPlacemark *placemark = [placemarks objectAtIndex:0];
NSLog(#" %#",placemark.addressDictionary);
}
}];
and the output is
{
Country = Nepal;
CountryCode = NP;
FormattedAddressLines = ( "Pulchowk Road", Nepal );
Name = "Pulchowk Road";
State = Bagmati;
Street = "Pulchowk Road";
Thoroughfare = "Pulchowk Road";
}
The question is why i am not getting all of the information. For eg City , ZIP .. are missing. How should i handle this issue in program.

Geolocation is always using the best available information. Most likely for Nepal the mapping companies with whom Apple or its service provider contracted did not provide the information you are missing. This is more a contractual / service quality issue and I don't think there is anything you can do with it. Except trying to optimize your application to provide the best possible user experience even if it has only incomplete data.

Related

ios: What is the efficient and recommended way to reverse geocode?

I am to reverse Geo Code Latitude and Longitude of some location and want to get address of that location. I have done it through google web service but it takes time.
I want to know if there is some other good and efficient approach.
Currently calling this service,
NSString * getAddress = [NSString stringWithFormat:#"http://maps.googleapis.com/maps/api/geocode/json?latlng=%#,%#&sensor=true",Lattitude,Longitude];
You can use CLGeocoder:
[self.geocoder reverseGeocodeLocation:location completionHandler:^(NSArray *placemarks, NSError *error){
CLPlacemark *placemark = placemarks[0];
NSLog(#"Found %#", placemark.name);
}];
This will still take time though, since both methods use web services to convert lat / long into a place
Try This code .
geoCoder = [[CLGeocoder alloc]init];
[self.geoCoder reverseGeocodeLocation: locationManager.location completionHandler:
//Getting Human readable Address from Lat long,,,
^(NSArray *placemarks, NSError *error) {
//Get nearby address
CLPlacemark *placemark = [placemarks objectAtIndex:0];
//String to hold address
NSString *locatedAt = [[placemark.addressDictionary valueForKey:#"FormattedAddressLines"] componentsJoinedByString:#", "];
//Print the location to console
NSLog(#"I am currently at %#",locatedAt);
}];
Have a look at GLGeocoder. Specifically reverseGeocodeLocation:completionHandler:
You can use Apple's CLGeocoder (part of CoreLocation). Specifically, the – reverseGeocodeLocation:completionHandler: method which will return a dictionary of address data for the given coordinates.
Have a look at this tutorial, or, if just want something to copy quickly: NSArray *addressOutput;
CLLocation *currentLocation;
//assumes these instance variables
// Reverse Geocoding
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
[geocoder reverseGeocodeLocation:currentLocation completionHandler:^(NSArray *placemarks, NSError *error) {
NSLog(#"Found placemarks: %#, error: %#", placemarks, error);
if (error == nil && [placemarks count] > 0) {
NSMutableArray *tempArray = [[NSMutableArray alloc] initWithCapacity:[placemarks count]];
for (CLPlacemark *placemark in placemarks) {
[tempArray addObject:[NSString stringWithFormat:#"%# %#\n%# %#\n%#\n%#",
placemark.subThoroughfare, placemark.thoroughfare,
placemark.postalCode, placemark.locality,
placemark.administrativeArea,
placemark.country]];
}
addressOutput = [tempArray copy];
}
else {
addressOutput = nil;
NSLog(#"%#", error.debugDescription);
}
}];
Based off the code in the tutorial.
If you to not want to use google API, try this code - basically transforms latitude and longitude inputs into ZIPs (can be adjusted to adresses).
pip install uszipcode
# Import packages
from uszipcode import SearchEngine
search = SearchEngine(simple_zipcode=True)
from uszipcode import Zipcode
import numpy as np
#define zipcode search function
def get_zipcode(lat, lon):
result = search.by_coordinates(lat = lat, lng = lon, returns = 1)
return result[0].zipcode
#load columns from dataframe
lat = df_shooting['Latitude']
lon = df_shooting['Longitude']
#define latitude/longitude for function
df = pd.DataFrame({'lat':lat, 'lon':lon})
#add new column with generated zip-code
df['zipcode'] = df.apply(lambda x: get_zipcode(x.lat,x.lon), axis=1)
#print result
print(df)
#(optional) save as csv
#df.to_csv(r'zip_codes.csv')

Get a friendly location name given a set of geo coords?

Is it possible to get a human-friendly textual description of the closest meaningful landmark (such as a street intersection) for a given set of geographical coordinates, for example via a web service like Google Maps or some other third party? I am using MapKit, but I doubt it has anything built in. Turns out it does.
For example, I'm looking for something like the closest street intersection (in fact that would be ideal) or any kind of "place name" really. Things like:
E Hastings St and Main St
128 W Cordova St
PNE Fairgrounds
So I have done a project with this exact problem I came across... You can refer to the CLPlacemark class reference in the apple developer webpage.
Here is the way I used it, I think you also have to add the corelocation library as well to the project, as I had done.
#import <CoreLocation/CoreLocation.h>
Now in the .h file:
Add the CLLocation Delegate : <CLLocationManagerDelegate>
Then add the following instance variables:
CLLocationManager *locationManager;
CLLocation *currentLocation;
Now in the .m file:
-(void) viewDidLoad{
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.distanceFilter = kCLDistanceFilterNone; // whenever we move, location is updated
locationManager.desiredAccuracy = kCLLocationAccuracyBest; // get best current locaton coords
locationManager.headingFilter = 1;
[locationManager startUpdatingLocation];
[locationManager startUpdatingHeading];
}
And now implement the CLLocationManager Delegate Method in after the viewDidLoad method, or before, whichever you perfer:
#pragma mark CLLocationManager Delegate
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations {
currentLocation = [locations objectAtIndex:0];
[locationManager stopUpdatingLocation];
NSLog(#"Detected Location : %f, %f", currentLocation.coordinate.latitude, currentLocation.coordinate.longitude);
CLGeocoder *geocoder = [[CLGeocoder alloc] init] ;
[geocoder reverseGeocodeLocation:currentLocation
completionHandler:^(NSArray *placemarks, NSError *error) {
if (error){
NSLog(#"Geocode failed with error: %#", error);
return;
}
CLPlacemark *placemark = [placemarks objectAtIndex:0];
NSLog(#"City = %# : State = %# : Country = %# : Zip Code = %#", placemark.locality, placemark.administrativeArea, placemark.ISOcountryCode, placemark.postalCode);
}];
}
Run the code and make sure that if your using the iOS simulator, be sure to simulate a location by clicking on the arrow button just above the console output screen.
It only shows up once you have built and ran your project.
Hopefully this helps you :)
Heres the output I got:
2013-08-02 20:39:46.935 PowerOneApp[3449:c07] Detected Location : 37.785834, -122.406417
2013-08-02 20:39:49.773 PowerOneApp[3449:c07] City = San Francisco : State = California : Country = US : Zip Code = 94115
EDIT
Sorry, I realized when I wrote this answer that you wanted more EXACT coordinates.
Here:
#pragma mark CLLocationManager Delegate
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations {
currentLocation = [locations objectAtIndex:0];
[locationManager stopUpdatingLocation];
NSLog(#"Detected Location : %f, %f", currentLocation.coordinate.latitude, currentLocation.coordinate.longitude);
CLGeocoder *geocoder = [[CLGeocoder alloc] init] ;
[geocoder reverseGeocodeLocation:currentLocation
completionHandler:^(NSArray *placemarks, NSError *error) {
if (error){
NSLog(#"Geocode failed with error: %#", error);
return;
}
CLPlacemark *placemark = [placemarks objectAtIndex:0];
NSLog(#"%#", placemark.addressDictionary);
NSLog(#"%#", [placemark.addressDictionary valueForKey:#"Street"]);
}];
}
Heres the output:
2013-08-02 20:44:26.052 PowerOneApp[3531:c07] Detected Location : 37.785834, -122.406417
2013-08-02 20:44:26.340 PowerOneApp[3531:c07] {
City = "San Francisco";
Country = "United States";
CountryCode = US;
FormattedAddressLines = (
"Apple Store, San Francisco",
"1800 Ellis St",
"San Francisco, CA 94115-4004",
"United States"
);
Name = "Apple Store, San Francisco";
PostCodeExtension = 4004;
State = California;
Street = "1800 Ellis St";
SubAdministrativeArea = "San Francisco";
SubLocality = "Union Square";
SubThoroughfare = 1800;
Thoroughfare = "Ellis St";
ZIP = 94115;
}
2013-08-02 20:44:26.340 PowerOneApp[3531:c07] 1800 Ellis St
As you can see, there is a property called addressDictionary that returns ALL the propertys the CLPlacemark class holds. So here, if your familiar with NSDictionary objects, I just outputted the entire dictionary first then specified which value I wanted to log.
Hopefully this helps your exact question :)
check google maps api, I think something like this should work:
var geocoder = new google.maps.Geocoder(),
lat = "12.1234",
long = "98.7654",
latlng = new google.maps.LatLng(sLat, sLong);
geocoder.geocode({"latLng":latlng},function(data,status) {
if(status == google.maps.GeocoderStatus.OK) {
var add = data[1].formatted_address; //this is the full address
alert(add);
}
});
you can get the "E Hastings St and Main St" and full name of venue as well, you just need to add more stuff to the function. check out the google maps api.

iOS - Get Address around a Long/Lat

I was wondering if anyone knew how to get a list of addresses around a longitude and latitude?
I've been using the following code but it always yields one address:
[self.geocoder reverseGeocodeLocation: currentLocation completionHandler:
^(NSArray *placemarks, NSError *error) {
for (int i = 0; i < placemarks.count; i++)
{
CLPlacemark *placemark = [placemarks objectAtIndex:i];
if (placemark.addressDictionary != nil)
{
Location *aLocation = [[Location alloc] init];
aLocation.locationName = [placemark.addressDictionary valueForKey:#"Name"];
aLocation.locationAddress = [placemark.addressDictionary valueForKey:#"City"];
aLocation.currentLocation = placemark.location;
[self.tableData addObject:aLocation];
}
}
[self.locationsTableView reloadData];
}];
I'm not sure if Core Location's geocoded is intended to do that.
Google allows for this kind of search but with limits with their Places API. That being said, you can do a search for something like "Pizza" and get results within a radius.
For more info look at: https://developers.google.com/places/documentation/
You can use their API to query based on a lat/long with a search query and radius to get results looking like what you're after.
Good luck!
First change your latitude and longitude value (and check may be your code is right) becoze in map, some coordinate does not provide full information.
following provide code for if some coordinate does not provide full information then how can give you condition for get specific CITY(or other Infor) name.
Here getReverseGeocode method call by [self getReverseGeocode];
- (void) getReverseGeocode
{
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
if(currentLatLong.count > 0)
{
CLLocationCoordinate2D myCoOrdinate;
myCoOrdinate.latitude = LatValue;
myCoOrdinate.longitude = LangValue;
CLLocation *location = [[CLLocation alloc] initWithLatitude:myCoOrdinate.latitude longitude:myCoOrdinate.longitude];
[geocoder reverseGeocodeLocation:location completionHandler:^(NSArray *placemarks, NSError *error)
{
if (error)
{
NSLog(#"failed with error: %#", error);
return;
}
if(placemarks.count > 0)
{
NSString *MyAddress = #"";
NSString *city = #"";
if([placemark.addressDictionary objectForKey:#"FormattedAddressLines"] != NULL)
MyAddress = [[placemark.addressDictionary objectForKey:#"FormattedAddressLines"] componentsJoinedByString:#", "];
else
MyAddress = #"Address Not founded";
if([placemark.addressDictionary objectForKey:#"SubAdministrativeArea"] != NULL)
city = [placemark.addressDictionary objectForKey:#"SubAdministrativeArea"];
else if([placemark.addressDictionary objectForKey:#"City"] != NULL)
city = [placemark.addressDictionary objectForKey:#"City"];
else if([placemark.addressDictionary objectForKey:#"Country"] != NULL)
city = [placemark.addressDictionary objectForKey:#"Country"];
else
city = #"City Not founded";
NSLog(#"%#",city);
NSLog(#"%#", MyAddress);
}
}];
}
}

Convert NSString Latiude/Longitude Coordinates to City, State, and Timezone with CLGeocoder

I have a view controller that pulls the users latitude and longitude coordinates from the app delegate. This works well, but I also need the user's city, state, and time zone. I know I should use CLGeocoder for this (please see last chunk of code), but don't know how to put it together. I'd just need NSStrings of the city, state, and timezone. Anyone have any pointers or an example? Thank you!
In my App Delegate, I use CCLocationManager to get the Coordinates like this:
- (NSString *)getUserCoordinates
{
NSString *userCoordinates = [NSString stringWithFormat:#"latitude: %f longitude: %f",
locationManager.location.coordinate.latitude,
locationManager.location.coordinate.longitude];
locationManager = [[CLLocationManager alloc] init];
locationManager.distanceFilter = kCLDistanceFilterNone; // whenever we move
locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters; // 100 m
[locationManager startUpdatingLocation];
return userCoordinates;
}
- (NSString *)getUserLatitude
{
NSString *userLatitude = [NSString stringWithFormat:#"%f",
locationManager.location.coordinate.latitude];
return userLatitude;
}
- (NSString *)getUserLongitude
{
NSString *userLongitude = [NSString stringWithFormat:#"%f",
locationManager.location.coordinate.longitude];
return userLongitude;
}
In my View Controller, I get the user's Latitude and Longitude as an NSString with this:
NSString *userLatitude =[(PDCAppDelegate *)[UIApplication sharedApplication].delegate
getUserLatitude];
NSString *userLongitude =[(PDCAppDelegate *)[UIApplication sharedApplication].delegate
getUserLongitude];
I would like to get the city, state, and timezone. I understand I need CLGeocoder, but can't figure out how to meld it together:
CLGeocoder * geoCoder = [[CLGeocoder alloc] init];
[geoCoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray *placemarks,
NSError *error) {
for (CLPlacemark * placemark in placemarks) {
NSString *locality = [placemark locality];
}
}
A couple things, Brandon:
1) CLLocationManager might not give you an instant response to your request for coordinates. You should set your view controller as a CLLocationManager delegate and then when the location update comes in (which will be in the locationManager:didUpdateLocations: method), then you can run your CLGeocoder method.
2)
Which I wrote to look like this:
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
NSLog( #"didUpdateLocation!");
NSLog( #"latitude is %# and longitude is %#", [self getUserLatitude], [self getUserLongitude]);
CLGeocoder * geoCoder = [[CLGeocoder alloc] init];
[geoCoder reverseGeocodeLocation:locationManager.location completionHandler:^(NSArray *placemarks, NSError *error) {
for (CLPlacemark * placemark in placemarks) {
NSString * addressName = [placemark name];
NSString * city = [placemark locality]; // locality means "city"
NSString * administrativeArea = [placemark administrativeArea]; // which is "state" in the U.S.A.
NSLog( #"name is %# and locality is %# and administrative area is %#", addressName, city, administrativeArea );
}
}];
}
Getting the location's timezone is a bit trickier. I bet there's an API or some sample code to get it within iOS, but it's not a part of the CLPlacemark API.
Form a CLLocation from latitude and longitude double value. Then feed that location to reverseGeocodeLocation:completionHandler:
Also note that the method reverseGeocodeLocation:completionHandler: is asynchronous.
You can also use, CLLocationManagerDelegate's locationManager:didUpdateHeading:
to asynchronously update if there is an Location available, which is better.
Anyway following your approach, just modifying some of your code from AppDelegate
- (double)getUserLatitude
{
return retrun locationManager.location.coordinate.latitude;
}
- (double)getUserLongitude
{
retrun locationManager.location.coordinate.longitude;
}
-(CLLocationManager*) getLocationManager
{
return locationManager;
}
Now Form a Location object
double latt = [(PDCAppDelegate *)[UIApplication sharedApplication].delegate getUserLatitude];
double longt = [(PDCAppDelegate *)[UIApplication sharedApplication].delegate getUserLongitude];
CLLocation loc = [[CLLocation alloc] initWithLatitude:latt longitude:longt]
or you can directly get the location object from CLLocationManager
CLLocation loc = [(PDCAppDelegate *)[UIApplication sharedApplication].delegate getLocationManager].location;
Then you can use your code feeding the location to reverseGeocodeLocation:completionHandler: and Get the CLPlaceMark
[geoCoder reverseGeocodeLocation:loc completionHandler:^(NSArray *placemarks,
NSError *error) {
for (CLPlacemark * placemark in placemarks) {
NSString *locality = [placemark locality];
NSString * name = [placemark name];
NSString *country = [placemark country];
/*you can put these values in some member vairables*/
m_locality = [placemark locality];
m_name = [placemark name];
m_country = [placemark country];
}
}
While I don't have a solution for the timezone issue (I agree with others who've answered this question - look for a non-Apple API), I thought I'd provide an answer in Swift, for those who are curious:
func provideGeocodedStringForLocation(location: CLLocation, withCompletionHandler completionHandler: (String) -> ()) {
let geocoder = CLGeocoder()
geocoder.reverseGeocodeLocation(location) { (placemarks: [CLPlacemark]?, error: NSError?) -> Void in
guard let placemarks = placemarks where placemarks.count > 0 && error == nil else {
if let error = error { print(error.localizedDescription) }
completionHandler("Earth")
return
}
let city = placemarks[0].locality ?? ""
let state: String
if let adminArea = placemarks[0].administrativeArea {
state = ", \(adminArea)"
} else {
state = ""
}
completionHandler("\(city)\(state)") // produces output similar to "Boulder, CO"
}
}
// get the lat/long from your UIAppDelegate subclass
let latitude = CLLocationDegrees("40.0176")
let longitude = CLLocationDegrees("-105.28212")
let location = CLLocation(latitude: latitude, longitude: longitude)
provideGeocodedStringForLocation(location) { print($0) }
I got timezone name from placemark description. And it works for ios 8 and higher.
You can check this link for how to get time zone

reverse geocoding and localization

I use this code to set a label with a location string
locationString = [[NSString alloc] initWithFormat:#"%#%# - %# %#%#",
thoroughfare,subThoroughfare,postalCode,
locality,countryCode];
locationLabel.text = locationString;
where thoroughfare, subThoroughfare, postalCode, locality,countryCode are obtained from a placemark.
Now, I'd like to visualize this string according the current locale. Have I specify a string format for each locale in which I'm interested or there is a simpler way to obtain this?
Thanks,
Fran
you can use following function
-(void) setLocation:(NSString *)latitude withLongitude:(NSString *)longitude {
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
CLLocation *location = [[CLLocation alloc] initWithLatitude:[latitude doubleValue] longitude:
longitude doubleValue]];
CLGeocodeCompletionHandler completionHandler = ^ (NSArray *placemarks, NSError *error){
if (error){
NSLog(#"error in fetching location <%#>",error);
return ;
}
if ( placemarks && placemarks.count >0){
CLPlacemark *mark = [placemarks objectAtIndex:0];
NSString *addresstring = [[mark addressDictionary] objectForKey:#"FormattedAddressLines"] componentsJoinedByString:#","];
*//fetched addressDictionary for key FormattedAddressLines*
}
The addressDictionary property of the placemark object should resolve in part the problem with its FormattedAddressLines array.