geolocation

What's the most efficient way to get a United States user's State? Is HTML5 Geolocation an option without needing to involve google maps? Marcel Here's a couple of examples in JavaScript and JSON (with the help of jQuery ) using both the IP lookup method (with the help of IPinfoDB ) and the Geolocation API method (with the help of Google Maps API and YQL ). In both examples I'm retrieving the region and country but there are several values you can choose from. Be aware these examples don't do any error handling and here they are edited for brevity, otherwise see the full demo . IP Lookup in

I noticed that Frequent Location on iPhone seems to use much less battery than an app monitoring iOS Visits ( https://developer.apple.com/reference/corelocation/clvisit ). Frequent location on iPhone can be viewed on the phone via Settings -> Privacy -> Location Services -> System Services -> Frequent Locations. I would like to know if Visit monitoring service from CLLocationManager is the same as iOS Frequent location or is it on different system used by Apple. If Apple is using the same service why it does not have any impact on the battery? Joshua Briefman The two APIs are intended for

I started a "free" open-sourced project to create a new data set for pH of the earth oceans. I started from the open data-set from NOAA and created a 2.45 millions rows data-set with those columns: colnames(NOAA_NODC_OSD_SUR_pH_7to9) [1] "Year" "Month" "Day" "Hour" "Lat" "Long" "Depth" "pH" Method document HERE . Data-set HERE . My goal now is to "qualify" each row (2.45m)... to do so, I need to calculate the distance from each point of Lat/Long to the nearest shore. So I am looking for a method that would take In: Lat/Long Out: Distance (km from shore) With this, I can qualify if the data

I currently have a MySQL table that is structured as follows: id name lon lat ----- ----- ----------- ----------- 1 Mark -76.316528 40.036027 2 John -95.995102 41.25716 3 Paul -82.337036 29.645095 4 Dave -82.337036 29.645095 5 Chris -76.316528 40.036027 The way I currently query the DB to see if a user's location is within a certain mile radius of a given location is by doing this. function Haversine($lat_from, $lon_from, $lat_to, $lon_to) { $radius = 6371000; $delta_lat = deg2rad($lat_to-$lat_from); $delta_lon = deg2rad($lon_to-$lon_from); $a = sin($delta_lat/2) * sin($delta_lat/2) + cos

I'm looking for a paid or free service that can return geographic points of interest within a given proximity (e.g. 10km) filtered by category, such as "Restaurants". Factual looks promising, but doesn't support my country - South Africa. The Google Places API is still in developer preview. There must be a mature online service that can act as an "online GPS" for finding nearby places? GeoNames API returns geolocated Wikipedia articles located near given point: http://www.geonames.org/export/wikipedia-webservice.html SimpleGeo API returns info about given point https://simplegeo.com/docs/api

I have a list of areas and lattitude/longitude which I'm asking the user to select their location when they hit my site. I'd like to have their location prefilled using HTML5's geolocation if possible, but I'm not exactly sure the best way to do that. There seems to be a lack of tutorials on the web, at least from what I can find. Has anyone done this? Do you know of a good tutorial/resource? update If I have coordinates of bunch of cities, how can I use javascript to determine the closest location? Try this example: window.onload = function(){ if(navigator.geolocation) navigator.geolocation