location

问题 I have a data structure like below. how can I define a geo index for that structure? { "currentGeoLocation": { "latitude": -10, "longitude": 1 } } I tried these command: 1- db.test.ensureIndex({ type: "geo", fields: [ "currentGeoLocation[latitude]","currentGeoLocation[longitude]" ] }); 2- db.test.ensureIndex({ type: "geo", fields: [ "currentGeoLocation.latitude","currentGeoLocation.longitude" ] }); but I think none works correctly. because after I search the nearest items, I got []. whats the

问题 I'm trying to come up with a way to navigate to HTML anchors within the same page without reloading. Right now I'm just using: header("Location: #anchor_name"); The problem with that is it reloads the page. I'd really like to avoid using JavaScript if I can but I don't know if there's any other way? Thank you! PS - I know I need to use the full URI in the redirect - just abbreviated here for simplicity. 回答1: You could use js: function scrollToAnchor_name(anchorName) { location.hash = "#" +

问题 I can find the current location latitude and longitude.But These data are not shown before change my current position.I want to get current location longitude and latitude without change my position. package com.example.gps; 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.util.Log; import android.view.Menu; import android

问题 I have 3 Locations, Location A,B and C. Now let's assume in a Polyline Location A comes first Location B second and Location C third. Just assume that my current location is Location B. Now I can clearly see that I have traveled or covered Location A and my upcoming Location is Location C on a polyline, but how can I know these things programmatically that I have covered these much of points of the Polyline. I have a list of Latitude and Longitude which forms a Polyline. In short, I want to

问题 I am developing a app in which I want the progress dialog to be displayed when the app is started (when the GPS service starts). I want to end the progress dialog when the GPS service returns with a valid position. I know I have to start another thread but I am not sure how to do it. I have: locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 10, this); in my onCreate() . public void onLocationChanged(Location location) is where the data is being updated. 回答1: I assume

问题 I have a query implementing RuntimePermission for Location . When I tried to requestLocationUpdates , I got LintError suggesting me to add PermissionCheck for that line. Considering that I implemented run-time permissions. So this is how it looks, if (isNetworkEnabled() && networkListener != null) { if (ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(context, Manifest.permission

问题 I am currently working on a Google Map current location application. Everything is good and there is no error detected. When I run my application, Google Map is able to load but is not showing my current location. So I put my logcat here and please someone help me. Is it related to the "Asset path '/system/framework/com.android.media.remotedisplay.jar' does not exist or contains no resources." ? I did some research on this but could not find the solution. 1882-1882/com.example.yan.basicmap I

问题 This question already has answers here : Closed 8 years ago . Possible Duplicate: How to detect whether GPS signal is weak or high? Is there any possible way to know that the GPS signal is week ? Such as the user in the building then the GPS may not send data. This is the reason why I want to check the GPS signal. 回答1: There is no specific way to do that. I usually follow a time-out approach where you can wait for about 30-45 seconds to get a fix and if you do not get a fix within that time,

问题 Background: I want to allow users to get their location within seconds when they want it. However, the location is mostly inaccurate. I want to ask the user to if they would like to try again for a more accurate address. Question: How to code such that it guarantees that the next guess, is always better than the last guess. What I have tried: CLLocationManager *locationManager; - (CLLocationManager *)locationManager { if (locationManager != nil) { return locationManager; } locationManager = [

问题 I just ran into another problem using Leaflet. I want to zoom into specific locations using Links provided underneath the maps. With one link I got it to work fine but more Links don't work. I figured out that the "getelementbyId" must be the problem because an ID is meant to be unique in an html page. But I don't have enough knowledge of JS to solve this any other way. Could somebody maybe help with this problem? The locations are stored in tags: <div id="map-navigation" class="map