Global Positioning System (GPS)
0
votes
0answers
36 views
Associate media to gpx vector layer from Python Console
Essentially, I would like to have the description in the form of text annotations when i hover my mouse over the gps entry. And if i click the same, it should display the images.
So I started off by ...
3
votes
1answer
93 views
Join GPS points obtained from .GPX file in Python Console
Having loaded the .gpx file into a new layer from python console, I'm unable to access the gps points in the attributes table. Essentially, i'm unable to join these points to form a polygon ...
7
votes
1answer
104 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 ...
5
votes
1answer
193 views
Why are points collected with a Trimble FM 750 off by more than a mile when displayed in QGIS?
I have a grower that has a FM 750 and is trying to make points in a field. When finished he takes the file out of the display and goes to his computer and he can bring up the points in the right ...
0
votes
1answer
304 views
How to fix the QGIS for Android GPS panel?
I have installed qgis on my samsung galaxy s1.
But I cant test the gps.
I found how to turn the gps on, but I cannot open the gps pannel to do it.
When i press view->panels there is nothing happens.
0
votes
1answer
127 views
Looking for a tutorial on syncing QGIS with Trimble ProXT
Does anyone have any experience/advice to sync a TrimbleProXT gps antenna with the current "Lisboa" 1.8.0v?
Additionally did you manage to collect features (points,line,polygons) in the field ok? ...
2
votes
1answer
246 views
Current time from GPRMC or GPZDA?
In GPRMC there is a time field, called fix time. Can I consider this always the same as value from GPZDA time? Is there any possibility that when GPS device is configured to stream both GPRMC and ...
1
vote
2answers
167 views
Exporting shp into a GPS [duplicate]
Possible Duplicate:
How to convert .shp into .gpx using QGIS?
I'm trying to convert a shapefile with some random points into a gpx file, but I'm having some problems: when I upload the gpx ...
5
votes
2answers
267 views
How to merge multiple file geodatabases into one file geodatabase?
I have created a file geodatabase that has several feature data sets, feature classes, and domains. I have created a map with the file geodatabase added to it, converted the map to ARCPAD AXF format ...
11
votes
3answers
1k views
What is the maximum Theoretical accuracy of GPS?
I was talking with a potential client, and they requested that we plot some points with GPS, with a maximum (or should that be minimum?) accuracy of 2 m.
This is an area with no WAAS, and I was under ...
11
votes
1answer
264 views
Why does GPS altitude jump sometimes?
I am currently developing a little application in Android which uses GPS.
When i click a button i start to record a "track". If i walk around i save my position every second into a file. This works ...
3
votes
0answers
92 views
QGIS: GPS Tracking with improved Altitude
I am preparing for archeological fieldwork in Sudan. I recently came up with RTK equipment and software using RTKlib to export the real time corrected data (cm level) to QGIS via a simulated NMEA ...
1
vote
1answer
154 views
GPS data validation
I was wondering if Fix quality data from GPGGA, can be substituted to Validity field in GPRMC? In my application I have to use only GPRMC, but I don't really know if it sets validity only if Fix ...
0
votes
2answers
701 views
Can *.ssf files from Trimble GPS be imported as features to display in ArcMap?
I have not come across *.ssf files before but I believe they are a Trimble GPS binary format. Someone has asked me if these files which he thinks have line/poly features can be imported for display ...
16
votes
3answers
614 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 ...
3
votes
0answers
99 views
Are there any known problems using GPS connection in Android version of QGIS? [closed]
I install QGIS both my netbook (windows win7 starter) and My tablet (android 4.0). I can used GPS option in windows version and I can save location points from GPS. However, I could not manage same ...
5
votes
3answers
277 views
Register and display real time tracking of my smartphone (gps) on a map
I have 2 smartphones (android galaxy and iphone) and i would like to display the position, according to the gps coordinates, on a map.
Is there any app to download or any kind of service where i ...
1
vote
0answers
49 views
calibrating vector line in qgis
I have loaded GPS points into a QGIS vector layer.
I also imported a vector line from a dxf file which doesn't have georeferencing.
I would like to fit in line geometry between the GPS points - how ...
6
votes
1answer
92 views
GIS Server for web service
I am building an app that has some GIS requirements that go a little beyond (I think) what I can retrieve from existing online web services resources so I am attempting to build a server of my own to ...
0
votes
0answers
310 views
How does a GPS/GSM/GPRS Tracker work without a monthly fee?
GPS newbie here.
Looking at this product: http://dx.com/p/gps-gsm-gprs-tracker-for-personal-remote-positioning-29284
How does a GPS tracker work without a monthly plan?
Thank You.
6
votes
2answers
500 views
Accessing GPS data with JavaScript in real time
Is it possible to access GPS data in real time on a smartphone with JavaScript (without an android or ios application I mean)?
Thanks
1
vote
0answers
27 views
Creation of 3d terrain from real data [duplicate]
Possible Duplicate:
3d terrain from data in postgres
I am pretty new to spatial database and 3D data. I have a project where i have to create a 3d terrain from data being taken by me by a ...
4
votes
1answer
138 views
How to show a geoTiff on an iOS application?
I'm developing an iOS application that will use offline maps. These maps are on GeoTiff format but I don't know how to do it.
I've found this question: How to display a GeoTIFF on mapView but it uses ...
3
votes
1answer
111 views
How to connect particular sets of points with (poly)lines?
I think my problem is quite easy to be solved by the most postgis-users, but i am a bloody beginner: i have a timestamped point-table representing GPS-tracked places of different cars. To distinguish ...
2
votes
1answer
51 views
Pathfinder Differential Correction: “Use reference position from” who?
How do you choose either "base files" or "base provider"?
1
vote
1answer
147 views
Small Idea to get best path between two points
Guys I don't know if its a good place to post ideas or to ask general questions. Still as the question is related with maps service, I am posting it here. If it's not the right place, please move me ...
1
vote
1answer
167 views
Can i use GPS Garmin GPSmap 62s in GIS projects with high accuracy?
i have GPS Garmin GPSmap 62s, is this can be dependable in GIS projects with high accuracy, and what is the "RMS", the minimum error rate in meter, and can i linking it with arcpad to draw road or ...
6
votes
2answers
118 views
How to improve positioning of images taken with GPS and Gyro info?
I'm sort of 'recreating' google street view with MIT right now.
We have a car with a camera on top and we're driving at 10mph down a road. As we drive we're shooting pictures at 30fps and each photo ...
2
votes
0answers
117 views
QGIS on android4 with bluetooth GPS
I'm trying to set up a moving map on my tablet (asus, Android 4).
I've installed QGIS (latest version), which works. I've got a blue tooth external GPS, which I've paired to the tablet. However, I ...
1
vote
1answer
198 views
GPS units compatible with Galileo
It seems like after lots of initial problems Galileo project is taking off (ESA, BBC).
I was wondering what the state of preparation for that is on hardware side.
Are there any consumer grade GPS ...
4
votes
4answers
1k views
Using android phone to plot GPS points?
I was wondering if I could use my android phone (HTC Wildfire) to plot gps points and export these into GIS software (I have QGIS and MapInfo).
Thanks,
Alan
11
votes
5answers
489 views
Detecting “lack of movement” on GPS device
Me and my associated are having a bit of a concept problem.
We're using a GPS tracking device mounted in vehicles and later display the movements in our application. Pretty straightforward, right?
...
9
votes
2answers
117 views
How do I detect traffic incidents in a set of geospatial gps traces?
I have a large database of gps traces (long, lat, timestamp) and would like to see if I can detect when congestion occurs on roads from that data. Any idea's or pointers on good algorithms to use? ...
4
votes
3answers
398 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 ...
3
votes
2answers
202 views
How to upload polygon shapefiles to my GPS?
I used QGIS to create a table (*.shp) containing 3 polygons. These polygons represent "forbidden zones" that I would like to export to my Garmin GPSmap62st so once on the countryside, I'll can see my ...
3
votes
1answer
132 views
best bluetooth gps for marine applications
What is the best gps to get as an add on for an android (asus tf300)? This is for a marine application I am writing.
I need sub 5 meter accuracy.
Would like decent accuracy at moderate speeds.
I ...
2
votes
1answer
117 views
Keyboard shortcut for GPS data capture in QGIS
I would like to setup keyboard shortcuts for GPS data capture with QGIS.
Using GPS Information dialog box, I could use Mouse-Left-Click to "Add feature" and "Add track point", but I would like to ...
1
vote
0answers
140 views
Convert GPS coordinates to EPSG:54004
I need to convert GPS coordinates to EPSG:54004 on android. Are there any libraries or formulas to acomplish the task? Thanks in advance.
3
votes
1answer
161 views
Access Trimble GPS on ArcGIS Engine App
Hopefully this isn't too obscure.
I have a Trimble Yuma tablet running Windows 7. I need to build an application that allows viewing of points on a map and editing of a geodatabase (feature layers ...
8
votes
3answers
414 views
What GPS device do I need for vehicle tracking?
I am a programmer with no connection to Geographic information, except that I work on application which uses google maps.
So here is my problem.
I need some device, which I will be able to set in a ...
2
votes
0answers
232 views
Are there any shapefile-based GPS data recorders?
I am looking for a data recorder that can be programmed to send a serial data request to a field computer and then accept and record an incoming data string and tie it to GPS location and then save ...
2
votes
2answers
438 views
How to find the Shortest Path between two coordinates points using pgrouting A-Star?
In PostGIS I have two tables: an osm road network and a table that contains the start and end coordinate points of each path (i.e. userid, start_x1, start_y1, end_x2, end_y2). I would like to know:
1) ...
2
votes
0answers
81 views
From gpx to line segment 1Km using ArcGIS 10
I have gpx files containg points with attribute data such as time and date. I'd like to convert them into lines, and that is not a problem, but what I want to do is create 1Km segments with time and ...
0
votes
2answers
655 views
PostGIS convert geography(Point,4326) to GPS
I got a database with a column of type geography(Point,4326), the data contained looks like 0101000020E610000092E057F66EF73140930035B56CBD4840. How can I convert it to GPS coordinates?
8
votes
4answers
455 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 ...
2
votes
0answers
117 views
How would I modify GPS tracker to accept two nmea inputs and gpsmarker to include a heading vector?
I use QGIS on a research vessel and wonder whether I could modify the QGIS 1.8.0 gpsinformation widget. I want to achieve two things.
1. Change the GPS marker to a boat shape which points in the ...
-1
votes
1answer
296 views
Does GPS Navigator send data to Satellite?
Does GPS Navigator send data to satellite?
Is this true about regular devises available in the market?
2
votes
1answer
62 views
What operations do the GPS recievers perform after capturing signal from Satellite?
What are the operations on the signals recieved by a GPS reciever ?
How does it process them towards achieving a position fix ?
I need explanation with the decoding and correlating part of the ...
0
votes
0answers
95 views
MapFish Print latitude, longitude innacuracy?
I'm new to GIS so this may be trivial: I'm using MapFish Print to create some PNG. I have issues to place the viewport. When I use a random GPS coordinate: -20.904522,55.475106 which seem to point ...
5
votes
1answer
149 views
Simulate (Mock) GPS Tracks
I have the following scenario:
1) I need to create GPX files for use in testing of a mobile device.
2) The tracks to be described within will span large distances over long time periods (i.e. it's ...
