geolocation

问题 'double android.location.Location.getLatitude()' on a null object reference return new ParseGeoPoint(loc.getLatitude(), loc.getLongitude()); and with the ParseGeoQuery query.whereWithinKilometers("GeoArea", geoPointFromLocation(myLoc), radius); This is the onCreate Method where the location is being initialized // Create a new global location parameters object locationRequest = LocationRequest.create(); // Set the update interval locationRequest.setInterval(UPDATE_INTERVAL_IN_MILLISECONDS); /

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 3 years ago . I have a set of dataset with missing geo location names and coordinates at same time. I want to fill in the gaps so that I can proceed with the future analysis of the data. The data set is harvested from twitter so it is not a created data but this is how the data has come and I

问题 following this post and working with Corodva 3.6 bring me to open the Native google maps from my app. That's what I wanted. Here is the exact line I'm executing: window.location.href = url; Where url is equal to: geo:-122.41327719999998,37.7715108 It does open the map. But it brings me to Antartica with geo:0,0 I think. What am I doing wrong ? I did use <access origin="geo:*" launch-external="yes" /> in my config.xml Many thanks 来源： https://stackoverflow.com/questions/26876392/why-launching

问题 I'm trying to use a leaflet map to show the current position of the user on the map. Something like a live GPS tracking. This is my current code: var watchID; var geoLoc; function showLocation(position) { var latitude = position.coords.latitude; var longitude = position.coords.longitude; } function errorHandler(err) { if(err.code == 1) { alert("Error: Access is denied!"); } else if( err.code == 2) { alert("Error: Position is unavailable!"); } } function getLocationUpdate(){ if(navigator

问题 I'm following this tutorial to get user's location on iOS React Native app: https://hackernoon.com/react-native-basics-geolocation-adf3c0d10112 Using this code to get current location: navigator.geolocation.getCurrentPosition((position) => { console.log(position); // TBD this.setState({ location: true }); }, (error) => { console.log(error); // Handle this this.setState({ location: false }); }, { enableHighAccuracy: true, timeout: 20000, maximumAge: 1000, }); But the app crashes at this file:

问题 I'm very confused. I'm using EF CORE. I'm hoping this has happened for others in older Entity Frameworks. I'm having a problem whereby I am providing different postcodes which are converted into lat longs. @gLat nvarchar(50), @gLong nvarchar(50) DECLARE @Location geography = geography::Point(@gLat, @gLong,4326) however the "Distance" field is returning the same distance. cast(@Location.STDistance(Location) / 1609.344 AS float) AS 'Distance' --Always returns the same distance AS THE LAST QUERY

问题 I am trying to post these coordinates from the metadata of the image i upload with paperclip to another table called places."so coordinates go to places table." There are columns latitude and longitude in the places table. After submitting the post i run into this error. The highlighted portion of the error is self.latitude=parse_latlong(etc....). post_id is a foreign key in the places table. This worked previously when i had latitude and longitude in the post table. but now i gave it its own

问题 I need to code a finder of cities in a radius of X km. of a given one using a ZIP code or a city. Something like this: Enter ZIP code or city: [ ] Choose Radius in Km. (10) (20) (30) ------------------------------------------- [ Submit ] So I need a database relating zip codes, coordinates and city names. (not for USA, Germany) Anyone know of any? Or a ready to use web service or whatever that allow me go to the beach earlier? THX.- 回答1: I just found this: http://api.geonames.org

问题 There are a lot of geocode services out there (like http://geo-autocomplete.googlecode.com/svn/trunk/demo/ui.demo.html for example) where user can write a location (or part of it) and it will be resolved to real existing location. There is also a lot of info provided with the search result (like country ISO code, coordinates, etc..), but none of the services seem to provide country and city code. What I mean is a code used to phone to certain are. For example Country code for Germany will be

问题 I cannot work out how to watch a user's location using the W3C GeoLocation API. What's the easiest way? All I want is an update of the user's latitude and longitude. 回答1: I've just been using this in a project, I worked it out using Ben Nadel's blogpost and the API itself. navigator.geolocation.watchPosition(function(position){ // These variables update every time the location changes var Latitude = position.coords.latitude; var Longitude = position.coords.longitude; }, function(error){ //