geolocation

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . What are the available (best) ruby IP-based geolocation gem/plugins? How do they compare to one another in terms of functionality, performance and ease of use (e.g. do they interact with a web service, or require a separate database, etc.) ? I'm hoping anyone that has used some can share their experience and

问题 I know the browser shares my IP address and details of nearby wireless networks to determine my location, but what sort of info does it know about nearby wifi networks? For example, where I live are no public wireless networks, and from my home I can see about 5 private networks, yet my location is determined within 20 meters. With there being no open networks nearby, how does Google determine my location? The only way I can think of is that Google mapped the locations of all wireless

问题 i am trying to submit user registration form in android with current location. I am new to android and java development. when i try to access myLat and myLan of the onLocationChanged method in my name value pairs code , it is unable to find both the variables. How can i access both the variables in my name value pair code. package com.imran; import java.io.IOException; import java.util.ArrayList; import java.util.List; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair;

问题 I would like to retrieve images from Wikimedia Commons to display on a map. This means that given a pair (latitude, longitude) I would like to find pictures around this point. After a day of searching and trying I have still no idea whether this is possible or not. In particular I have read MediaWiki API Main page, the API reference and some examples. So my question is: is it possible to retrieve pictures with a pair of geographical coordinates? If yes, how? 回答1: Yeah, that's possible. On

问题 I'm new in android. I'm currently working on an android project in witch I need to get user's current location using GPS. But my code is not working properly. java Code package com.example.checkinapp; import android.app.Activity; import android.content.Context; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.os.Bundle; import android.widget.TextView; public class MainActivity extends Activity { TextView

问题 Is it possible to get the geolocation of a user without the browser prompt? Here's the code sample from W3 <script> var x = document.getElementById("demo") function getLocation(){ if(navigator.geolocation){ navigator.geolocation.getCurrentPosition(showPosition); } else { x.innerHTML="Geolocation is not supported by this browser.";} } function showPosition(position){ x.innerHTML="Latitude: " + position.coords.latitude + "<br>Longitude: " + position.coords.longitude; } </script> Is there any

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . If you have a latitude and longitude stored in your database and need to calculate the distance between two coordinates. How can you calculate it using a MySQL function? 回答1: After searching around for awhile, I

问题 If memory serves me correctly, google does this for the maps site. I know google's mobile maps app can determine the rough location (I assume using some kind of cell tower lookup), yet I seem to remember the site getting somewhat close to the current location when viewing on a mobile browser. Anyone know how/if that's possible? Does the IP address change based on the tower or area (seems like they'd be using some kind of gateway common to the carrier)? 回答1: With a regular HTTP request the

问题 Google tells me that Japan's lat/long values are (36,138) but .NET throws the error 24201: Latitude values must be between -90 and 90 degrees. Any ideas why? 回答1: I have had the same issue as you, I was using DbGeography.PointFromText("Point(lat lng)") when the lat & lng arguments are expected the other way around. The complete answer is this: // From Google, Japan's latitude: 36; longitude: 138 var lat = 36; var lng = 138; var location = DbGeography.PointFromText($"Point({lng} {lat})"); 来源：

问题 Google tells me that Japan's lat/long values are (36,138) but .NET throws the error 24201: Latitude values must be between -90 and 90 degrees. Any ideas why? 回答1: I have had the same issue as you, I was using DbGeography.PointFromText("Point(lat lng)") when the lat & lng arguments are expected the other way around. The complete answer is this: // From Google, Japan's latitude: 36; longitude: 138 var lat = 36; var lng = 138; var location = DbGeography.PointFromText($"Point({lng} {lat})"); 来源：