Questions tagged [tracking]

Tracking refers to recording the position of something continuously.

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0answers
28 views

Keep tracking alive for trackpaths when phone is in sleep mode [closed]

I've found that tracking only works if QField is active and the screen is turned on constantly. This drains battery power. As soon as the power button is pressed to conserve the battery the tracking ...
7
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2answers
160 views

GPS glitch causes 200 m circles around stationary position- Has anyone seen this before?

I am working with GPS data from public transport buses in a city in the UK. The data have very characteristic circles of approx. 200 m diameter at bus stops. I suspect that these are caused by an ...
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65 views

Recording a track, not a polygon in QField [closed]

I researched the QField documentation, google, etc. but could not help myself. My goal is to record a GPS track using QField. However, the tracking function only seems to work in polygon layers. The ...
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1answer
116 views

Buses movement data visualization in QGIS

What is the easiest way to visualize the movement of city buses in QGIS, as it is shown at this website? https://anitagraser.com/2020/05/24/movement-data-in-gis-30-synchronized-trajectory-animations-...
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0answers
32 views

QGIS 3.10.5 GPS live tracking

I use QGIS 3.10.5 and GARMIN GPSMAP 64S connected with USB cable to do live tracking. The GPS Information panel shows that I am connected but nothing happens on the screen.
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35 views

Seeking GPS Tracker with NO realtime

I am looking to buy a GPS tracking device that I can put in the car that will track (at least) location and speed (perhaps once a minute or so) and store the data. I do not want to pay for a service ...
1
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1answer
27 views

Tracking in browser while the phone is locked with ArcGIS (ESRI) [closed]

The Question How can I track a user's movements via ESRI's JavaScript API in a web browser when their phone is shut/locked? This would ideally work for all web browsers (i.e. Android and Apple ...
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35 views

How to prepare oneself to show a polyline based on latitude and longitude information in a csv/json file with heatmap information too? [duplicate]

I am quite new to working with JavaScript as well as geo location systems. I am looking for an open source JavaScript library to show - on the web - something very like the running trackers show you -...
3
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1answer
57 views

GPS: what limits the _rate_ of change in altitude?

I have a GPS tracker/transmitter I use in rockets. I use it to locate and recover a rocket. I realize that Altitude is not the strong suit in GPS, and don't expect it to be really accurate. Neither do ...
2
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0answers
37 views

Receiving strange characters from GPS tracker, is this HEX or binary?

I am struggling with a GSM GPS tracker. It looks like a clone of GT02A, and it is a relatively common model. My problem is that when it sends data to my server, it is not readable. I set it to send ...
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35 views

PostgreSQL Trigger to keep track of table changes [closed]

I am trying to create a trigger (PostgreSQL 9.4) to track changes made to a table. This is my approach: CREATE OR REPLACE FUNCTION taxon_history() RETURNS trigger AS $BODY$ BEGIN IF TG_OP = '...
4
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1answer
156 views

How to track progress on a route?

I want to track and visualize the progress of a bus, as follows: I have the coordinates of each station as well as the coordinates of the bus, updated every 10 seconds The information is stored in ...
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53 views

Eliminate irrelevant points based on time and distance

I'm collecting raw GPS points from android device for tracking, now when i'm creating a linestring based on the points i collected there are some points which makes no sense (due to GPS fluctuations). ...
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0answers
44 views

Interactive trigger for external image viewer?

Is it possible to navigate from point to point with a shortcut on the keyboard and interactively (tracking) display the embedded photos at the point locations in an external image viewer? I could do ...
1
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1answer
39 views

Accurately tracking location in outback? [closed]

I am looking for a way to efficiently track my whereabouts/tracks whilst traveling through the Australian bushland. In the past, I've just recorded my longitudes and latitudes from a basic GPS onto a ...
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0answers
218 views

Difficulty in getting QGIS to connect with in-built GPS (COM3 NMEA port)

I have a Motion J3500 rugged tablet which was upgraded last year to run Windows 10. The tablet has a built-in GPS / broadband module (Gobi Sierra 2000). I use QGIS (v3.2) on the tablet, with the GPS ...
0
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1answer
66 views

wrong track building with openlayers

faced with the situation when ol draws lines if the coordinates are "scattered". for example. coords as is: and sorted coords by date: bottom image is almost correct except sharp lines up. ...
2
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2answers
1k views

Auto generating waypoints to a GPX file along track (hiking path - not as crow flies)

I have used Google Maps to build a list of waypoints for a trail I want to hike but the waypoints are simply my start, end and maybe a couple of points of interest for my day and any campgrounds along ...
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0answers
42 views

Export tracklog from GPS information panel [duplicate]

When I use QGIS on the field, I always turn the tracklog on in the "GPS information" panel. So the tracklog is showed as I walk with the GPS on, but I can't find the way to download this track into a ...
2
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1answer
264 views

Live Tracking with Garmin inReach explorer+

I'm trying to connect my Garmin Inreach Explorer+ gps to QGIS (running on a MS Surface 5 tablet) via bluetooth, but have been unsuccessful so far. The goal is to have to a live tracking tablet while ...
2
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1answer
67 views

Visualize Polygon Changes

I've unfortunately experienced a version control issue between offices where one person was editing an older version of a polygon shapefile. Now I need to reconcile those edits into the current ...
0
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1answer
265 views

convert geoJson data to interactive map tiles containing icons,labels and popups

In my search for a solution for showing up a tremendous amount of points data on a map, I ended up with an idea of generating GeoJSON data, then convert GeoJSON to map tiles that can be served using a ...
2
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0answers
935 views

Record a GPS track in qfield?

Okay I can't figure out for the life of me how to log a live GPS track in qfield. I can add points and draw polygons, both of which are useful, but how does one track? I am trying to use qfield to ...
0
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1answer
165 views

Can I use avaraging to pinpoint the exact location of a stationary GPS device?

I have a simple Android app that keeps track of users' location, using the following setting of the LocationManager to avoid constant updates and thus battery drain minTime = 60sec (minimum time ...
2
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0answers
395 views

Identifying activity places in GPS trajectories using R?

Is there a way in R (a script or package) that would allow identifying activity spots in GPS tracking data? I have a number of GPS tracks in GPX/CSV formats that follow the movements of people in a ...
2
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0answers
432 views

Plotting realtime .nmea files with QGIS 2.18.10

I am working on a project that requires us to track 2 GPS targets, one car and one weather balloon. The realtime GPS tracking of the car via the COM port works great. The decoded data from our weather ...
3
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0answers
158 views

Computing the similarity between tracks

I need a way of comparing two tracks (they will most likely be GPX files), i.e., 2 arrays of lat-longs. I need to write some code that will compare the two arrays and give me a measure of how close ...
2
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0answers
321 views

Vessel Tracking‎ service in qgis or standalone

I'm looking for a Vessel Tracking‎ service to add it in Qgis or a standalone service. I'm interested in adding a layer above the map who does tracking the vessels. I find this https://www....
5
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2answers
6k views

Inaccurate altitude GPS data with my Android?

I've been recording tracks with GeoTracker on my Android. In places I have points that have altitudes higher than the peaks of a mountain. Like one altitude difference is 46 m. How is it possible to ...
2
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0answers
326 views

Multiple gps tracking in QGIS?

I was wondering if someone could point me in the direction of display the output of multiple gps devices at the same time in QGIS. I have two GPS devices that are both outputting NMEA sentences ...
3
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3answers
1k views

Calculating distance travelled along track in QGIS?

I'm new to GIS. I have some tracks of people walking from point A to point B that I took using breadcrumbing with Garmin e-trex (set on the Auto track settings). I've loaded the tracks into QGIS and ...
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1answer
1k views

Finding out if I've deviated from given route too much (computing similarity between routes)

I'm making an Android app and I'm trying to find out whether I've deviated from the given route too much (I'm getting location via GPS and the route is predefined). I've tried calculating Fréchet ...
1
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1answer
91 views

How to adjust the Record Dates field in ArcGIS 10.3.1 for Desktop?

When I use the Editor Tracking in polygon layer, the Date time that been created is not true: and my real time was: I read: http://desktop.arcgis.com/en/arcmap/10.3/manage-data/editing-...
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2answers
988 views

ArcGIS API for JavaScript: Draw a Tracker Line from GPS points

I have gps points which sent from tacker device I need to draw a line in openstreet map ArcGIS with Javascript, How can I do this. I can convert gps points to any format that needs to be (XML, JSON, ...
4
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1answer
1k views

Create GPX track in R. writeOGR function

I have a gpx file where someone exported two different activities in two separate locations to a single track. I need to split them and avoid getting the erroneous line in the track layer that ...
2
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1answer
225 views

How can I match Geolife traces using TrackMatching or similar tools?

I am working on route prediction and I decide to use realistic trace of moving object, I have choose geolife dataset it is composed of 278 users and every user has its trips presented in GPS or GPX I ...
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0answers
154 views

How to export dynamic track (video) from QGIS?

Is it possible to export a file video with QGIS with a dynamic track from point A to point B? I need something like a presentation of a race where a dot is moving along the track from the start to ...
3
votes
2answers
725 views

How to rename several layers at the same time?

I have got some GPS tracks (MultiLineString). As I import them to QGIS, they look like this: I would like to merge them and to do so, I have to rename all of them like this (picture 2) otherwise an ...
0
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1answer
422 views

Keep only the last marker when geolocating

I'm working with OpenLayers 2 and I managed to create a javascript to locate the users and it works fine. I added a marker representing the current location and when the position change, it creates a ...
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0answers
55 views

How to know where views are being generated from in CartoDB?

I see in my dashboard that I can hover over a map and see how much it is being viewed. Many services, like mapbox and even youtube show you where your views are being generated from or perhaps it just ...
1
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0answers
87 views

Filtering GPS tracks to determine “Moving Time”? [closed]

I am working with GPS tracks of outdoor activities, think cycling, running, hiking. These activities often have "rest periods" where people take a break, wait at traffic lights, or just stopped their ...
3
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1answer
502 views

Does the mean of latitude and longitude make sense?

The problem setting: I have a time series of geolocation data, namely latitude and longitude. I want to downsampling the time series and don't know if taking mean value of latitude and longitude ...
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0answers
635 views

Geofence and GPS-Tracking in QGIS

What is the easiest possibility to create a geofence and to track if subjects cross the fence? I assume the fence is a simple polygon vector? What do I need for the cars? GPS data set? GPS layer?
0
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1answer
266 views

GPS data -tracking analyst

i have GPS data from 15 trucks for one month. The data include (location x-y, speed, altitude and vehicle_id). I have used tracking analyst to visualize the data but i need to group them by day to ...
6
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1answer
4k views

How to create an exact tracking route from GPS data with animated icon?

Probably this is not purely GIS related question, its related to developing issues. I am just asking if there is any kind of suggestions from Gurus. I am building an tracking application where GPS ...
1
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1answer
834 views

Database Editor Tracking Time Stamp Issue

I have Esri Tech Support looking into this but I thought I would post it here too. I have a File Geodatabase with Editor Tracking Enabled. The date is fine but the time stamp for creation and edits ...
2
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5answers
505 views

Some companies receiving GPS data from vehicles when GPS cannot send any data?

I know that some companies offer tracking services for vehicles such as live GPS tracking they can access any time, but as you can't use the GPS protocol to send any data i wonder how the do it... I ...
2
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2answers
765 views

Create tracks from GPS points honoring polygon barriers

I have fish tracking data from a river. The data include positions, times and tag ids. Time interval between positions may be several days. I would like to create a polyline track for each fish tag ...
1
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0answers
19 views

Track Traffic Display in World Wind [duplicate]

Is it possible to play records which has trajectories and time stamps as live traffics. I did investigate the World Wind SDK but I can not see special classes for aviation or Tracks and trajectory ...
0
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1answer
878 views

cross platform Mobile tracking app to report to custom server?

Does any one know of IOS, Andriod apps for asset tracking that I can point to my server? I can then write some code to intercept the messages from the mobile app. ideally a solution which works on ...