GPS eXchange Format is an open non-propietary GPS file format free from license restrictions used to describe waypoints, tracks, and routes. Its tags store location, elevation, and time. Outside of Esri, it is the defacto standard for exchanging GPS data between applications.

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27
votes
6answers
7k views

How to create a polyline-based “heatmap” from GPS tracks?

This winter I am planning to track my downhill skiing/snowboarding using a GPS. Most of my riding will occur at the same resort. I would like to be able to create a sort of "heatmap" that shows the ...
27
votes
7answers
11k views

Is there a good GPS track analysis library?

I keep writing custom code to work with GPS tracks: GPX files and NMEA logs from my phone, dedicated GPS logger, etc. I feel like I'm reinventing the wheel and am wondering if there's some standard ...
24
votes
10answers
30k views

What is the simplest method to add GPX files into Arcmap?

What is the smoothest route, the easiest user experience, to add gpx files to Arcmap? (update) Basically, ideally, I'd like to interact with .gpx with the same facility as .shp, being able ...
21
votes
2answers
16k views

How to convert .shp into .gpx using QGIS?

I'm newbie using QGIS. I would like to convert .shp into .gpx. So, using Qgis, I open my shapefile and I tried to "save as" gpx but it gives an OGR error: creation of field ObjectId failed (OGR ...
11
votes
5answers
3k views

How to build a geographic database of GPS logs?

On our aerial wildlife surveys we typically generate dozens of GPX files, and usually convert most of them into shapefiles for display in a GIS application. GPX files are a terrific way of keeping all ...
11
votes
2answers
173 views

How to anonymise a gps file?

Imagine you have a GPS trace that you want to make anonymous, in the legal sense. How would you do this? Is snapping to the nearest x distance and stripping out the time enough? Are there ...
9
votes
1answer
1k views

Why do vectors disappears when zooming in?

I have imported a .gpx file into qgis and separated the track waypoints using Vector > GPS > GPS tools. When viewing at full extent I can see the original track and component waypoints. However when ...
8
votes
4answers
5k views

How to use Z-Coordinate in QGIS?

I was mapping an area in Namibia and also tracked a lot of paths on my way with my Garmin device... so I thought it would be nice to see height differences in my area (esp. interesting in the ...
8
votes
1answer
1k views

PostGIS - Calculate progressive distance between points on a GPX path

I am attempting to build an elevation profile using PostGIS-PostgreSQL only. I have imported GPX data in my PostGis database, so now I have a table full of the GPS coordinates of the track and the ...
8
votes
2answers
3k views

How can I export a linestring to a GPX file in QGIS?

I have a linestring in a vector layer in QGIS. How can I expot/save this linestring as a GPX file? I tried to select the linestring, then right click on the vector layer and choose "Save selection ...
7
votes
1answer
7k views

Is there a way to export a point layer from QGIS to a csv file?

I have saved waypoints from my Garmin as gpx and have successfully imported them into QGIS. Is there a way to now export the layers into a csv file with coordinates? I've tried the export to csv but ...
7
votes
3answers
300 views

Interpolate data from multiple gpx tracks

I have a number of GPX tracks of the same road. But due to GPS error they are not accurate enough (20-30m off). I'm wondering if I could interpolate those multiple gpx tracks into single one. If an ...
7
votes
1answer
223 views

Unable to load .gpx file from Python Console

I'm trying to create a plugin which will extract the gpx files and load them onto the active layer window in QGIS. While I'm able to load it using the QGIS GUI from Layer>New Vector Layer, I'm not ...
6
votes
2answers
2k views

Automating batch load of multiple GPX files into PostGIS

I've got 50+ GPX files that I would like to "batch load" into a PostGIS database. All of the track_points data would be loaded into a "track_points" table (with typical GPS fields like lat, long, ...
6
votes
2answers
500 views

How to bulk import gpx files to QGIS and merge into a single shapefile?

I am looking to create my own 'heatmap' of all the bike rides I have recorded using the app Strava in QGIS. I have over 450 individual gpx files and would like to merge the track points layers into ...
6
votes
3answers
5k views

How to transform GPX-tracks into elevation-tracks with any GIS?

I have a GPS track in GPX format available from a recent bike tour and I need and want to do some analysis on the tracks. I'm wondering whether there is any way to transform the GPX data into an ...
6
votes
1answer
871 views

Converting GPX track_points layer to CSV with lat/lng with ogr2ogr

What's the correct command to convert a GPX track_points layer to CSV with lat/lng coordinates using ogr2ogr?
6
votes
1answer
11k views

How to batch convert Garmin GDB to GPX?

I need to convert a lot of garmin GDB files to GPX in order to convert it to another vector format. Is there any tools available can do a batch convert from garmin GDB files to GPX? Using MapSource ...
5
votes
3answers
8k views

Rendering GPX track data into video?

I have two geeky passions while driving: recording GPX data to upload to OSM as well as recording on board videos like this one. Since these kind of videos are sort of boring for others to watch I was ...
5
votes
1answer
814 views

How to determine the most accurate elevation algorithm

I use an Android GPS cycling app to track my bike rides and I would like to get a reasonably accurate estimate of the total ascent I did on a ride. I understand that GPS is very inaccurate at ...
5
votes
3answers
2k views

GPS Datalogger with USB Interface and GPX Output

I'm looking for a reliable, robust and reasonably priced GPS datalogger, to measure time, distance on tracks. The logger should be reasonably priced but ready for outdoor activities. Mud, dirt, a ...
5
votes
1answer
55 views

How to improve GPS recording?

The image shows as example a small loop by car, recorded by two Garmin Dakota 10 devices. It seems both devices have had difficulties caused by the surrounding buildings, the "blue one" seemingly had ...
5
votes
1answer
449 views

Differentially correct GPX file

Is there any way to differentially correct a GPX file using free or open-source tools? Does a GPX file contain the necessary information for differential correction (I can put the timestamp in it ...
5
votes
1answer
503 views

Python libraries for correlating Photo to GPX file?

Can anyone recommend a Python library(s) that can geotag a photograph with the lat/long coordinates by correlating the timestamp of the photograph to the timestamp of a waypoint within a GPX file? I ...
5
votes
2answers
329 views

How to download Leaflet vectors in GPX format?

I would like to use the leaflet.draw plugin to allow users to digitize vectors on the map. At the end the data should be downloadable as a GPX-file. Is there any sample that shows how this can be ...
5
votes
1answer
654 views

Exporting all attributes from a GPX file

I have a GPX file that i have imported into Google Earth, it looks like this. When I try and use the GPX to features tool in ArcGIS, it does not export out all the attributes.. It seems that GE ...
4
votes
6answers
1k views

How do I make a SHP file from waypoints?

I have a Garmin etrex 20 and I want to convert my waypoints into a shapefile for QGIS. The waypoints need their name and background information with them in the shapefile.
4
votes
1answer
982 views

Convert from shapefile to GPX with selected attributes

I have a points shapefile that originally came from a GPX file (imported using QGIS). The original GPX file contained waypoints only and has disappeared. The shapefile has many attributes, but only ...
4
votes
1answer
240 views

Calculating speed along point feature class (.gpx) in ArcMap?

I have imported a .gpx file into ArcMap as a point feature class. Each feature has a Point z as well as a DateTime. I want to create a graph that shows speed as a function of distance. How do I do ...
4
votes
2answers
1k views

GPS-Plugin and Garmin data

I am an avalanche specialist and I use a GPS Garmin 62 for fieldwork. I for example use waypoints to measure snow depth in avalanches for volume calculations. When I add a waypoint in the garmin ...
4
votes
2answers
323 views

Repository for GPS tracklog (better gpx format)

I've developed some algorithms that work with GPS trajectories. So I need a repository in which I can download GPS trajecotries to run my test. I most need marine and air tajectories, better if ...
4
votes
1answer
50 views

Need to combine the lines created by Vector grid in QGIS into one polyline

I am having a fairly specific issue. I am starting off by creating 100m2 squares around specific points on a map by adding a buffer to the point and then using this buffer as the extent for a Vector ...
4
votes
1answer
134 views

Truly lossless TopoJSON / keep all coordinates in TopoJSON

I'm displaying GPX traces on a Leaflet map. I'm using TopoJSON to drastically reduce file size, which works pretty well. My problem is the following : I want to be able to display altitude and ...
4
votes
1answer
262 views

OSM personal points of interest

I use OpenStreetMap along with OSMand on my mobile device. I have personal points of interest on my map that I do not want to upload to the community. Currently I use Favorites in OSMand to save ...
4
votes
1answer
1k views

Elevation graph from GPX file

I've got many GPX files in the following format: <?xml version="1.0" encoding="utf-8"?> <gpx xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" ...
4
votes
1answer
143 views

Problem opening a shp in another application

I helped a colleague converting waypoints from a gpx file to a shape file. My colleague has only arcMap. I gave him the shp and when he opened it in ArcMap, it did not show anything in the attribute ...
3
votes
4answers
5k views

How to convert SHP to GPX or to JSON?

I would like to convert the tree inventory shape files of London (Canada) into a GPX file and if possible into a JSON file. You can download the archive from their Open Data website. It contains the ...
3
votes
2answers
184 views

Couldn't add a column to attribute table (GPX layer) | QGIS

Running QGIS 2.10.1 on Ubuntu 14.04 x64. Going to add a column to the attribute table (GPX layer) but couldn't select any type. Then, failed - "Failed to add field 'NameTest' of type. Is the field ...
3
votes
6answers
3k views

How to clean/edit GPX (tracks) files recorded from GPS device?

During a long trip, I have recorded tracks of my journey with the GPS of my smartphone. I have ended up with about 30 GPX datafiles. Now that I am back, I am trying to draw a map of this trip. I ...
3
votes
3answers
695 views

Can one load multiple GPX files at once?

I have a whole bunch of GPX files that I need to load into qgis and loading them one at a time using the GPS plugin is a bit painful. It will not allow one to select multiple files -- is there ...
3
votes
2answers
61 views

Retaining timestamp when saving gpx as shp in QGIS?

I'm somewhat new to QGIS. I used my Garmin GPS unit to record my tracks while collecting plant specimens for a plant inventory. When I collected each plant I noted the time of collection. I want to ...
3
votes
5answers
379 views

GPS Track Editor to crop tracks with select by clicking start and end points [closed]

I'm trying to take a bunch of gps tracks of mountain bike rides and turn this in to a trail map. I want a single track for each trail. I'm looking for an editor that will allow me to select a ...
3
votes
2answers
2k views

Read gpx track points in QGIS

I want to read GPX track points with their time stamps into QGIS. I try GPS Tools, GPX Conversions, Waypoints from a track. This fails on my PC at office (QGIS code revision d94c044). Sometimes QGIS ...
3
votes
2answers
477 views

Extract PostGIS line features to GPX

I have a request to provide GPX files of certain trails (around 100) that are present in OpenStreetMap. Given a local PostGIS install with OSM data, I think the process would be something like: ...
3
votes
1answer
3k views

Import GPX file to QGIS and correct apparent CRS problems

I am using Easy Trails software on an iPhone to output a gpx file of a walk. When I import the file (import vector layer) to QGIS, into a project with OSGB information and the correct CRS for OSGB ...
3
votes
2answers
434 views

Find GPX files which contain tracks located in a specified bounding box

I have a bunch of GPX files and I want to find out which files contain tracks located in certain geographic extent, e.g. files containing tracks in Pennsylvania. Also, the inverse is also useful too, ...
3
votes
1answer
38 views

problem with the import of a gpx file in any program

I have difficulties to import one particular gpx file. I got it via email and it displays some tracks. 10 segments and 5500 waypoints. i tried as follow: QGIS, also with GPSBabel Google Earth ...
3
votes
2answers
55 views

How to make a line shapefile converted from a gpx track file display over basemaps such as OpenStreetMap?

I have created a line shapefile from a Garmin gpx track file using QGIS 1.12.3 Lyon. Resultant vector file displays properly with other vector shapefiles. Problem is that created vector file (line ...
3
votes
2answers
272 views

Batch Convert Folder of GPX to SHP in QGis

I have a few GPX files (up to 35 Mb, with a few tracks each one) that I want to convert to SHP. QGis is faster and easiest, than ArcGis to convert GPX tracks to SHP, but is there a way to batch ...
3
votes
2answers
398 views

How to calculate the track length of GPX files with PostGIS?

I am trying to calculate the length of a GPX track. The original GPS data looks like this: <?xml version='1.0' encoding='UTF-8' standalone='yes' ?> <gpx ...