Global Positioning System (GPS)
0
votes
0answers
32 views
Is there any open Source Software to work with *.ssf? [duplicate]
Need an Open Source software to work with *.ssf, as I dont have Trimble Patfinder Office right now..
1
vote
2answers
63 views
QGIS Holux gpx file doesn´t show up
I´ve got a problem with displaying the imported gpx file. The gpx file is created in Holux Funtrek 130 PRo. The map I use is from Openstreetmap, I am sure it is the right map from the location I ...
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
0answers
47 views
How can a GPS receiver know the estimated error?
I would like to plot a circle of possible error on the map in a GPS app.
From http://en.wikipedia.org/wiki/Dilution_of_precision_(GPS), we can see that GDOP is equal to "delta of output location" ...
4
votes
1answer
77 views
GPS Elephant Tracking II: Is ArcGIS basemap imagery orthorectified?
-- For my original question and pictures of elephants wearing GPS equipped anklets, go here. --
I'm experimenting with the use of GPS anklets to track the movement of zoo elephants. This has proved ...
10
votes
1answer
372 views
Overview of GPS tracking system technologies
Background: I've been asked by a friend to estimate the cost of setting up a GPS tracking system for a small fleet of buses, so we can do real time reporting of bus locations via a webmap.
In my ...
3
votes
2answers
125 views
Several questions about using spatial data?
If you have spatial data for SQL server, can you use the spatial data (both geometry and geography) in another application for instance ESRI ArcGIS?
Is spatial data a standard that every GIS ...
10
votes
4answers
2k views
Clustering Trajectories (GPS data of (x,y) points) and Mining the data
I've got 2 questions on analyzing a GPS dataset.
1) Extracting trajectories I have a huge database of recorded GPS coordinates of the form (latitude, longitude, date-time). According to date-time ...
16
votes
3answers
619 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 ...
0
votes
0answers
30 views
How to integrate GPS data in a SHP file? / Comment fusionner 2 couches vectorielles? [closed]
In order to update a farming parcels dataset stored as a SHP file, I have captured updates with a GPS. How to integrate these GPS updates in my SHP dataset?
Pour mettre à jour un projet comportant ...
0
votes
1answer
45 views
Is it possible to download GPX another coordinate system except WGS(GCS) with GPS Tool on QGIS1.8.0?
I got GPS data with using bessel1841 as coordinate system.
When I download GPX data on GPS tool, it is automatically treated as WGS84.
Can I use another coordinate system when I download GPX on GPS ...
0
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0answers
51 views
Is it possible to see polyline as route or track data on GPS?
I would like to see polyline on GPS.
First, I try to convert polyline to GPX.
I uploaded GPX on GPS.
SO far, I could not see the line on GPS.
First of all,is it possible to see polyline as route or ...
0
votes
0answers
70 views
GPS tool does not work well on QGIS 1.8.0
I installed GPS tool as plug-in and GPSBabel as additional software.
I connected GPS through USB cable.
I set new GPS device edittor according to below site.
...
2
votes
1answer
187 views
Where can I find Foursquare Datasets?
I'm doing research which aims to analyse location based social networks. So the Foursquare dataset is suitable for me. Is there any Foursquare dataset available? I need 4 information in the dataset: ...
11
votes
3answers
2k 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 ...
5
votes
3answers
70 views
Can I access Trimble logged positions in ArcMap10?
We recently walked a fence perimeter with a Trimble Ranger, auto-logging positions at 5 second intervals in a generic point file. The exported file acknowledges over 800 points, but only displays the ...
0
votes
1answer
64 views
Alternate option for a Data Player plugin for GPS in qgis
I found a plugin for QGIS to play a GPS Track. (Data player plugin).The Problem is I can not read .gpx File with this plugin.
Is there another option?
4
votes
3answers
163 views
Wildlife surveys using tablet and GPS, import/export to/from ArcMap
I've found some info about this on a previous post (Advanced android app for mapping and GPS logging), but it didn't provide enough info, I'm hoping some other tech experts can help!
I have a tablet ...
2
votes
0answers
55 views
Interpolate current Course value of GPS using previous Course values
I have a set of GPS data with Lat, lon and Course. I need to interpolate current value of course, using previous values of Course. The formula I am using is not accurate in curves.In C language I was ...
4
votes
1answer
139 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 ...
7
votes
1answer
148 views
real time map matching
I am working on a project which requires real time map matching. I am currently using ArcGIS but not sure whether it will work.
Here is what happens with my system: the cell phones sent GPS fixes ...
0
votes
1answer
312 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.
6
votes
2answers
514 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
2
votes
1answer
118 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 ...
19
votes
4answers
10k views
What are the major differences between GPS, GLONASS and Galileo?
What are the major differences between GPS, GLONASS, COMPASS and Galileo?
3
votes
1answer
94 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 ...
0
votes
0answers
77 views
matching gps coordinates to a hand drawn map
I am looking for a professional who can help in the creation of a map app that requires GPS coordinates to be matched to a hand drawn illustrated map. to get an idea of the types of maps we are ...
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 ...
7
votes
1answer
106 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
196 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 ...
8
votes
3answers
426 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 ...
4
votes
3answers
244 views
Tracking a vehicle without GPS device
We are planning to write an application which have to track the user driving in his truck in the cities like New York city accurate upto which lane he was driving on. In the cities with those tall ...
2
votes
1answer
251 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
168 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
272 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 ...
3
votes
5answers
2k views
Sending GPS Location to server
Is it possible to send my current location on iPhone or Android to the server so that others can view my current location?
2
votes
2answers
444 views
How to convert Garmin Waypoints to Google Mercator?
I have georef some topocards with QGIS and the Google Hybrid Layer.
So, this cards are connected with the Google Mercator System.
Now I have some waypoints taken with Garmin GPSmap62 (in WGS84).
...
11
votes
1answer
266 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
94 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 ...
2
votes
0answers
307 views
How to read a .GPB file in C#?
I have a .GPB file, I need to extract the common GPS data from it but I don't find a clear structure that specify the contents of that file.
as a sample record from file
00000260 02 11 A9 61 E7 96 ...
2
votes
0answers
353 views
How to handle real time GPS data with ArcGIS Javascript API?
I'm developing a web app using Arcgis Server 9.3.1 and Javascript API
I have a database with gps data from several vehicles and I need to display each vehicle real position in a map. I display this ...
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 ...
2
votes
2answers
441 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) ...
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 ...
1
vote
1answer
155 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 ...
2
votes
1answer
51 views
Pathfinder Differential Correction: “Use reference position from” who?
How do you choose either "base files" or "base provider"?
0
votes
2answers
714 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 ...
2
votes
0answers
94 views
How to configure various client applications to display AVL data?
Given x number of GPS units transmitting NMEA formatted strings back to a server (xxx.xxx.xxx.xxx:xxxxx) is there a way to listen in on the traffic and parse NMEA formatted strings for display on a ...
4
votes
2answers
994 views
Trimble GeoXH, XM, XT - Data logging without Terrasync or GPSCorrect?
Is it possible to capture data for post processing on a Trimble GeoXH, XT, or XM without using Terrasync or GPScorrect? Specifically I would like to create a RINEX file. A Trimble 4000 series receiver ...
3
votes
1answer
383 views
Can an htm file be imported into Trimble's Data Dictionary Editor?
We've received several data dictionary files from other entities and they all are in *.htm format. We were hoping to not reinvent the wheel, as these are massive data dictionaries, so does anyone know ...
