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Questions tagged [android]

"Android is a software stack for mobile devices that includes an operating system, middleware, and key applications," Wikipedia.

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QField crashes when trying to delete objects

A project that is to be used by several mappers contains three geopackage layers that are to be processed. There are also several shapefiles and geopackages for orientation. Several WMS services as ...
Koob's user avatar
  • 1
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0 answers
60 views

Why does QField crash when opening/editing a project from QFieldCloud?

I created a QField Project by converting the currently open QGIS Project to a QFieldCloud Project using the QFieldSync plug-in. I then downloaded the QFieldCloud Project into QField on my mobile ...
Georgia Slim's user avatar
1 vote
1 answer
28 views

What does "Common frequency offset" plot means in gnss raw measurements?

I'm using Google's MATLAB code to analyze raw gnss measurement made with gnsslogger android app. In plots, there is one in particular that I don't understand the meaning, which is "Common ...
allexj's user avatar
  • 11
0 votes
1 answer
50 views

Bad Elf not showing location data in QField

We have a K88 Android tablet running version 7.1.1 (currrent version is 14 something). I can connect the Bad Elf to the app via Bluetooth, but no positioning data appears to be transmitted. I've ...
Alexi Allen's user avatar
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0 answers
23 views

Need to setup the QField Android Platform with Android Studio

I have seen the source code of the QField System, FYI (https://github.com/opengisch/QField/tree/master). I need to set up/Build and Run the Android Platform Alone in Android Studio from the above ...
Ajith Kumar's user avatar
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0 answers
26 views

Syncing QfField with Android

I've been running into syncing errors when trying to view new files I've uploaded to my desktop QGIS project (synced with QField Cloud project) on my Android device. I'm unable to view files and a ...
user234346's user avatar
0 votes
0 answers
48 views

Features from personalized Google Maps map not visible on Android device

I have developed a personalized Google map and shared it with fellow colleagues within our organization. However, when attempting to access the map through Android devices, we encounter issues where ...
Goran's user avatar
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0 answers
124 views

Using iPhone coordinates with Leaflet

I'm working on a Leaflet map using Chrome on a PC and everything works fine when I use my computer or Android phone. But when viewed in Chrome on an iPhone, the coordinates get shifted, like below. . ...
mmaguigan's user avatar
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0 answers
134 views

Gallileo HAS - Android support

Galileo started to provide corrections (HAS) at the beginning of the year. They are distributed either directly on the E6-B frequency or over the Internet via the Ntrip protocol. According to EUSPA, ...
DNL852's user avatar
  • 9
1 vote
1 answer
4k views

Android GPS accuracy (2 m) is greater than nominal accuracy

I read in several posts and websites that public GPS signal to smartphones has an accuracy of around 5 m, and that civilian signal accuracy is 100 m. Some other posts mentioned accuracy of c. 2 m and ...
rodrikev's user avatar
  • 510
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1 answer
828 views

Android Kotlin - Test if Point in Polygon from GeoFile

I'm developíng an App in Android Studio using Kotlin with Minimun API of 21 -Lollipop- that works totally offline, and i need to test if a point (decimal degrees for lat and long) that the users write ...
Daniel Florez's user avatar
1 vote
0 answers
158 views

Derive a center point and radius from a set of GPS coordinates and bearings

I have a problem similar to Triangulation: Estimate a location using lat/long coordinates and bearings. I have a series of GPS coordinates and bearings for each coordinate as well as accuracy for each ...
Lazaro  Herrera's user avatar
1 vote
0 answers
255 views

GNSS algorithms in Android and IOS

I am trying to determine what algorithms are used to determine location and speed in late-model Android and IOS smartphones. I am looking into merging the location data with higher frequency IMU data ...
Edward Lam's user avatar
0 votes
2 answers
149 views

How do I view KML network layers or WMS layers on mobile?

I want to view live layers (KML Network or WMS) on the phone. Google Earth application is very useful and advantageous for me and my team. But I guess Google Earth doesn't support live layers. Do I ...
firstlord's user avatar
  • 149
1 vote
0 answers
348 views

How to build shared library from spatialite as static library NDK

I want to build a shared library for android to link with JNI, all libraries on which it depends are static libraries. I used this to build spatialite and sqlite for android : https://github.com/...
VaK's user avatar
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1 vote
2 answers
968 views

QField imported project location on Android

Using Qfield 2.0.14 on Android 12. I manually transferred a QField project to my phone. I opened QField and used "Import Project from Folder". I have edited the project and can see the ...
Oisin's user avatar
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1 vote
1 answer
434 views

QField GPS error while tracking lines

I have been using QField for a while now testing whether our team should switch over to it for data collection. All was going well then we started getting really bad GPS errors while collecting lines. ...
sbec's user avatar
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1 vote
1 answer
1k views

Displaying shapefiles in Google Maps Android

I want to develop an Android app which will display Google Maps and also display a shapefile (Esri shapefile with polygons, styled in ArcGIS, and having an attribute table). I want to be able to ...
Asim Gulzar's user avatar
-1 votes
1 answer
143 views

Advise on GPS logging for walking trails [closed]

Context: I am part of a volunteer organisation that needs to accurately log the GPS coordinates of walking trails. They cover around 350km. They are marked with waymarkers and signs, which we also ...
wavey's user avatar
  • 3
0 votes
1 answer
769 views

QField fails to start with very simple project

I am new to this software so was following an online tutorial to create a very simple form with an open source base map. QGIS version 3.22.0-Białowieża. QField Sync v. 3.4.4. I copied all the files ...
Shona Frost's user avatar
1 vote
1 answer
282 views

Disable panning after loading a layer in ArcGIS Runtime

I have a MapView, I am loading a base map, and then I am loading a layer. Then I am setting the View Point to be that of the extent of the layer. The map loads and is zoomed to the extent of the Layer....
ZZZ's user avatar
  • 573
0 votes
0 answers
261 views

TtileProvider blank page - Google Maps API, own tile provider

I'm using Google Maps API to display mbtiles map hosted locally on my server. Tile service works fine (checked via requsts). But when I apply it to my Kotlin app nothing happens. Here's my code: ...
ghost_kx's user avatar
1 vote
0 answers
37 views

Identifying if a user is in building or shopping mall using GPS or WiFi data

I am trying to understand if there is a logic to see if a user is in a shopping mall or a building or outside using GPS or WiFi data captured from a mobile phone. Is there a logic to check?
Roger Ganga's user avatar
0 votes
1 answer
616 views

Unable to save changes in QField [closed]

I am trying to set up QField for a project, and during testing I am not able to save changes to point layer, and get the error "Unable to save changes". Project is saved on internal storage, ...
Tinyx's user avatar
  • 9
7 votes
3 answers
3k views

Is it possible to achieve sub-meter accuracies with a smartphone, without using an external GNSS-receiver?

I am currently working with QField on my tablet (Samsung Galaxy Tab S5e) and my smartphone (Samsung Galaxy A40). Since the positioning accuracy on my devices is rather low (absolute best case ~3m on ...
nuenueke's user avatar
  • 161
0 votes
1 answer
70 views

import .mbtiles[raster+png/jpg] from device can't view in Maptiler App

I am working with maptiler application in android[Kotlin+MVVM]. everything working fine except loading local .mbtiles map file. when I download a .mbtiles file from internet and load in to my android ...
Ajaykumar Mistry's user avatar
1 vote
0 answers
245 views

How to enable positioning in underground Metro/Subway stations for smartphones? [closed]

Summary: my smartphone can't do public transport journey planning in underground metro and subway stations because it doesn't know where it is. Is there a description for cities and public transport ...
Gerd Castan's user avatar
0 votes
1 answer
254 views

Returning null during using SpatiaLite transformation command in Android Studio

I am using Spatialite version as following: SPATIALITE_VERSION: 5.0.0-beta1 PROJ4_VERSION: Rel. 6.1.1 I am running the SpatiaLite transform function in the android studio and it returns a null value ...
user168505's user avatar
1 vote
1 answer
609 views

Display WMS layer from local GeoServer in mobile application with Cesium JavaScript Library?

I need to display a WMS layer from my local GeoServer in a mobile application with the Cesium JavaScript Library, but I don't know how to do it. Can anyone help me?
mesh's user avatar
  • 19
3 votes
0 answers
324 views

Calculate meter offset around decimal degree position

I have a position given in decimal degrees (x.xxxxxxxx and y.yyyyyyyy). I need to draw a rectangle around it. The center of the rectangle matches the position. The dimensions of the rectangle is given ...
7heViking's user avatar
  • 131
2 votes
1 answer
1k views

Better GPS accuracy in Android application

We are looking for ways to read higher GPS accuracy (less than 1 m) in our Android application. We have tried with couple of mobiles having L1 frequency and supports GPS , GLONASS, Galileo etc but ...
user684805's user avatar
2 votes
0 answers
385 views

Can't find geotools class in jar file/Maven dependency Android app [closed]

I am creating an Android app and using an extension from Maven dependency. This extension use geotools classes but when I compile and execute the app I have the following error: 020-04-20 21:51:52....
FVD's user avatar
  • 21
2 votes
0 answers
2k views

Can I use Geotools in Android Studio?

I want to use Geotools in Android Studio but get this error: Could not resolve org.geotools This is part of build.gradle allprojects { repositories { maven { url "http://repo.boundlessgeo.com/...
ch65's user avatar
  • 185
1 vote
1 answer
2k views

How to use ground overlay google map android for polygon area to fit the map image in it?

I have a park area that is not rectangle or a simple shape. It is just like polygon area. I could load sample image on it for testing, in my android app. There it is : mGroundOverlayRotated = ...
NimaAzhd's user avatar
2 votes
0 answers
891 views

QField does not get the GPS location on Android [closed]

I am using QField on three Samsung Galaxy S5 tab tablets for a field work. I created a QGIS project (with project and layers in the same CRS). I downloaded QField on the tablets and created a QField ...
P. Savary's user avatar
0 votes
2 answers
3k views

GPX route generator for android

I am looking for a free, easy to use android app or mobile friendly website to plan a route and save it in GPX format. So far I have seen https://mapstogpx.com/ which unfortunately does not work with ...
shiftyscales's user avatar
2 votes
1 answer
119 views

qgis2threejs navigation Android

The navigation of a 3D qgis2threejs map for an Android tablet is not optimal. Test on 7 and 10 zoll. Problem: If I want to zoom in or out with two fingers the zoomlevels are to big. It should be small ...
juko's user avatar
  • 736
0 votes
0 answers
320 views

Exporting KML/ SHP/ EXCEL Files from Google Maps [Android version]

I want to export my pin locations using Google Maps [ Android version] and save the layer as KML /SHP/EXCEL in my phone. Is this feasible using Google Maps or are there any other applications which ...
SOHINI GOSWAMI's user avatar
1 vote
0 answers
880 views

OpenLayers GeoLocation.getPosition() is inconsistent

In my mobile application I am using OpenLayers and trying to capture current position of the user by using GeoLocation.getPosition() method. The method sometimes returns position and sometimes return ...
user684805's user avatar
5 votes
1 answer
782 views

Relationship between Android bearing and iOS course?

I'm a mobile developer working on an Android and iOS app that displays the user's location and various POIs on a map. I've been comparing the location objects that I get back from Android and iOS and ...
GisNeophyte's user avatar
1 vote
0 answers
260 views

How can I calculate point's coordinates based on bounding box and tap click on phone screen? [closed]

E.g. I have bounding box [94818.24, 116189.125] [94818.914, 116189.8] and point's coordinate on my screen [695, 1082]. So how can I get a coordinate in CRS=EPSG:99781
Roab's user avatar
  • 119
2 votes
2 answers
1k views

QField operating system

Does anybody know if Qfield can run on Ipad? My understanding is it was build to run on Android 4.3 or later version. Anybodu knows if it can run on with IOS?
Olivier Cristol's user avatar
2 votes
0 answers
224 views

QField hyperlinks in Android

I am using QField for some mobile GIS on Android and would like to have a hyperlink in the attribute table that opens a file stored locally. If not in QField directly then in excel would work. None of ...
MrKingsley's user avatar
  • 1,443
0 votes
1 answer
885 views

Using getmapasync() function instead of getmap() function in Android to plot GeoJSON file?

This is the code that I have used to plot GeoJSON file in Google Maps in Android: mMap = googleMap; SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager() ...
user2711295's user avatar
1 vote
0 answers
132 views

Memory efficient shortest path algorithm for offline Android app [closed]

Finding the shortest path in a road network requires the road network to be loaded up in memory. Using Dijkstra's algorithm, for example, it searches through all the immediate road coordinates and ...
user134132523's user avatar
1 vote
0 answers
39 views

Memory management in offline routing with n waypoints?

I am trying to build an offline routing system with a map database on a portable Android device. Since I am still doing some research, I am stuck on what I think is a fundamental problem. To find the ...
user134132523's user avatar
3 votes
1 answer
2k views

Combining GPS and WiFi geolocation

I see that Google combines GPS with WiFi geolocation results to increase location accuracy. Does anyone know how it's done? How is WiFi information useful when it can have 10m+ accuracy? Is it only ...
John M.'s user avatar
  • 213
0 votes
1 answer
291 views

Easytouse Android app to visualise offline maps [closed]

I need to propose an application android, ultrasimple of use which proposes to visualize various layers offline (french Scan25, Orthophoto). The idea would be to create mbtiles (with QGIS, Mobac, ...
Alex31's user avatar
  • 11
1 vote
0 answers
162 views

Using QField in an Android emulator for Windows 10

I would like to use the QField application in a free and user-friendly Android emulator for Windows 10. May you recommand one ?
MonsieurTombola's user avatar
0 votes
0 answers
353 views

Start a tile server on Android app

We want to have a offline Leaflet map on mobile. For this we want to use some kind of Android app which will serve as a tile provider when offline. The Leaflet will refer to this Android app as tile ...
george's user avatar
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