With AS3 I combined geolocation and accelerometer to direct the iphone, with its back towards a star at the sky. Accelerometer works fine for tilt 0-90 degrees ( directed towards horizon, phone vertical - towards zenith, phone horizontal with screen downwards) but geolocation heading of course flips around 45 degrees tilt and begins to show star direction + 180 degrees. Around 45 degrees tilt geolocation heading becomes very random and I would be very grateful for a suggested algorithm to eliminate the randomness of this phase shift.
_____________
Specifically my problem is:

Geolocation:
head = event.heading;
head2 = event.heading -180;
 if(head2<0){head2 +=360;}

then
 if(angleSky>45) {head3 = head2;} else {head3 = head} // angle obtained by accelerometer

Ideally above angleSky 45 the code should choose head3=head2 and that should then be a continuation of the heading below 45. But this is not the case. Sometimes the geolocation heading switches at 43 or 44. Thus what I have tried but not succeeded is to store head  at 42 or 43 and then compare head3 with that. If head3 then is more than 100 degrees difference I tried to use the heading at 42-43. But I have not succeeded. Can it be that the aquisition rate, 50 mS is too fast? Or is this attempt to solve the problem not the optimal model?

Dear Sir ,

I am working on a GIS Data creation application , I would like to have your need for customization .I want that when user open a ArcMap application It will ask for Login window and user need to put their credentials ,then it allow to go inside the ArcMap ,Where I have ArcGIS Service and after accessing these service user will start to digitize the features in both online and offline mode .

If user created the feature and he doesn't have any internet connection while digitizing the features then data store in local table and once internet connection is there it will automatically store in the central server .

I look forward your kind help

Thanks & Regards.

Laxman

Its supposed to be a map guider an accurate gps for car by giving the accurate route through roads car must do.

underlined line is what debug shows it as wrong.

any other

using System;


using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
using Windows.Devices.Geolocation;
using Windows.Services.Maps;


// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409

namespace App75
{
    /// <summary>
    /// An empty page that can be used on its own or navigated to within a Frame.
    /// </summary>
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();

            button.Tapped += Button_Tapped;
        }

        private async void Button_Tapped(object sender, TappedRoutedEventArgs e)
        {
            BasicGeoposition b1 = new BasicGeoposition();

            b1.Latitude = Convert.ToDouble(startpositionlatitude.Text);

            b1.Longitude = Convert.ToDouble(startpositionlongitude.Text);

            BasicGeoposition b2 = new BasicGeoposition();
…

I have a problem in GIS coordinates. I have this excel file with unknown CRS


sample data:
source coordinate (EPSG:4994 PRS92)
x: 675282
y: 1217112
    - note (the location of this coordinate should point in Ormoc City, Philippines, because i know where this entity is located)

target coordinate (EPSG:4326 WGS 84)
Lon: 124.6051799°
Lat:  11.0016664°

but when you show it on the map, the coordinates points somewhere near the port area instead of pointing in corner real and burgos streets, Ormoc City, Philippines (should be near this coordinate LON=124.60670952, LAT=11.0056316)

I'm using this https://epsg.io for the transformation. Do you have any formulas that i can write in my excel file to convert it properly? Thanks in advance.
sample-biz-coord.JPG

Is there anyway I can hook up a garmin gps I have via USB and have it used for location services on Windows 10?

I made an outline in google earth a few months back and now I cannot delete it.  I cannot get the mouse to grab it.  Any ideas?

Hi,

  Google chrome GPS location could not be determined.Some times works fine.otherwise not working.Please suggest me any other for access location in google chrome browser.We want goole chrome browser access gps location.

  Every day we are facing this issue in our PC's.Work fine in LAptop & mobile chrome browsers

My app has been VERY slow of late, when I looked into it, it appears there is a massive memory leak It climbs up to 2gb and crashes

We used took three Heap Snapshots on chrome developer tool,

one during login (when the google maps are loaded) another after everything loaded, and another when signalR pushes the data.

We compared the three snapshots, Open Layer stuff had many detached dom trees and kept building up. Therefore, Open layers has contributed to the memory leak of the app greatly.

Among the functions that we suspected caused the memory leak are:

clearMarkers(),

removePopup(map.popups[0]),

removeFeatures(markerLayer.features),

flagLayer.removeFeatures(flagLayer.features);

markerLayer.removeFeatures(markerLayer.features).

After some few minutes the app crashes due to large amount of the memory used. The question is, how can we deal with this situation so that there are no memory leak in the app that is caused by the Open layers.

Also, when clicking anywhere on the app even in the pages where maps are not loaded, Open layer function are called. When Click events get fired they in turn calls the Open Layers functions.

Hi,

 I'm looking for recommendations for a small device like the tile that had a rest API.

Thanks

Dear Experts,

Can anyone advise me of a way to track my phone using GPS even when the mobile phone does not have internet access.

i have searched a lot on internet but they all need internet access to update the servers.

Thanks and Regards