Another option: Download the cities database from http://download.geonames.org/export/dump/ Add each city as a lat/long -> City mapping to a spatial index such as an R-Tree (some DBs also have the functionality) Use nearest-neighbour search to find the closest city for any given point Advantages: Does not depend on an external server to be available Very … Read more
If you use the Geolocation API, it would be as simple as using the following code. navigator.geolocation.getCurrentPosition(function(location) { console.log(location.coords.latitude); console.log(location.coords.longitude); console.log(location.coords.accuracy); }); You may also be able to use Google’s Client Location API. This issue has been discussed in Is it possible to detect a mobile browser’s GPS location? and Get position data from mobile … Read more
User Location on Android Getting the user’s location on Android is a little less straightforward than on iOS. To start the confusion, there are two totally different ways you can do it. The first is using Android APIs from android.location.LocationListener, and the second is using Google Play Services APIs com.google.android.gms.location.LocationListener. Let’s go through both of … Read more
You could download a free GeoIP database and lookup the IP address locally, or you could use a third party service and perform a remote lookup. This is the simpler option, as it requires no setup, but it does introduce additional latency. One third party service you could use is mine, http://ipinfo.io. They provide hostname, … Read more
Looks like we’re coding the same application 😉 Here is my current implementation. I’m still in the beta testing phase of my GPS uploader app, so there might be many possible improvements. but it seems to work pretty well so far. /** * try to get the ‘best’ location selected from all providers */ private … Read more
I have been having exactly the same problem, and finding almost no information online about it. Nothing at all in the books. Finally I found this sober query on stackoverflow and (ha!) it was the final impetus I needed to set up an account here. And I have a partial answer, but alas not a … Read more
Try this simple PHP function. <?php function ip_info($ip = NULL, $purpose = “location”, $deep_detect = TRUE) { $output = NULL; if (filter_var($ip, FILTER_VALIDATE_IP) === FALSE) { $ip = $_SERVER[“REMOTE_ADDR”]; if ($deep_detect) { if (filter_var(@$_SERVER[‘HTTP_X_FORWARDED_FOR’], FILTER_VALIDATE_IP)) $ip = $_SERVER[‘HTTP_X_FORWARDED_FOR’]; if (filter_var(@$_SERVER[‘HTTP_CLIENT_IP’], FILTER_VALIDATE_IP)) $ip = $_SERVER[‘HTTP_CLIENT_IP’]; } } $purpose = str_replace(array(“name”, “\n”, “\t”, ” “, “-“, “_”), … Read more
Time Zone Location Web Services Google Maps Time Zone API Bing Maps Time Zone API Azure Maps Time Zone API GeoNames Time Zone API TimeZoneDB API AskGeo – commercial (but arguably more accurate than GeoNames) GeoGarage Time Zone API – commercial, focusing on Nautical time zones. Raw Time Zone Boundary Data Timezone Boundary Builder – … Read more
Calculate the distance between two coordinates by latitude and longitude, including a Javascript implementation. West and South locations are negative. Remember minutes and seconds are out of 60 so S31 30′ is -31.50 degrees. Don’t forget to convert degrees to radians. Many languages have this function. Or its a simple calculation: radians = degrees * … Read more
You can connect to the Emulator via Telnet. You then have a Emulator console that lets you enter certain data like geo fixes, network etc. How to use the console is extensively explained here. To connect to the console open a command line and type telnet localhost 5554 You then can use the geo command … Read more