This tag refers generically to *any* space-based satellite navigation system that provides location and time information.

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17 views

What is the difference $GPRMC and $GPRMCA?

What is the difference between $GPRMC and $GPRMCA strings? I can find online documentation about $GPRMC strings, however I have a device that sends $GPRMCA strings. ...
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0answers
9k views

GPS vs NAVIC (The Indian Regional Navigation Satellite System) [on hold]

What's the key difference between NAVIC The Indian Regional Navigation Satellite System (IRNSS) and American GPS system? Radio Frequency Accuracy guaranteed Modulation Area Covered Engineering ...
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0answers
11 views

writeOGR R and add an icon symbol [on hold]

I am wondering if there is a way to add an icon symbol to the R code I am using to export data in GPX format. Here is some example data: dput(head(location_information)) structure(list(Stratum = ...
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1answer
2k 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 ...
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3answers
37k views

What are the major differences between GPS, GLONASS and Galileo?

What are the major differences between GPS, GLONASS, COMPASS and Galileo?
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1answer
175 views

Which tools integrate Leica zeno 5 gps handhelds into ArcGIS?

What other software can I use with my Zeno 5 gps handheld device from Leica geosystems except the one they offer that integrates with ArcGIS desktop? They suggested the 'Zeno office' and the 'Zeno ...
6
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4answers
2k views

Matching GPS tracks

I'm looking for a proper way to process multiple GPS tracks (so time ordered list of lat/lon points) and match/classify that segments, that are covered by multiple tracks: So it's not about ...
2
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2answers
59 views

Quantitative vs Qualitative heatmap

I'm having a debate with a colleague of mine over whether generated heat maps are quantitative or qualitative in nature. The underlying data source is GPS points. The GPS devices that we use are ...
4
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1answer
1k views

Microsoft Surface vs. iPad for mapping

I was recently introduced to the Avenza PDF app for iPad and I've been using it in the company I work for to help our field crews find their way around, and record waypoints and tracks. The app takes ...
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0answers
23 views

qgis v2.10.1-Pisa live tracking with gps save track as shapefile

I am using qgis with gps information and a usb gps. within gps information > options > digitizing I have checked the box for "Automatically save added feature" and Track > "Automatically add points". ...
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0answers
11 views

Uploading .gpx files (i.e., GPS data) into ArcGIS 10.3.1 and creating home range graphics [closed]

I'd like to preface this by saying I have very little ArcGIS experience. I took two introductory courses during my undergraduate education but don't remember a lot of what we covered (the classes were ...
2
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2answers
168 views

Reaching cm (inch) level elevation precision using drones

A road construction firm needs altitude data of road path before and after the construction and the error should be less than 3 cm (2 inch). Normally, they put a ground station and workers manually ...
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0answers
163 views

Using R to map matching GPS data? [closed]

I have many vehicles GPS data points, which consist of "timestamp, longitude, latitude, fuel consumption and distance" and the data is OSM(open street map) based. I want to match the data points to ...
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0answers
20 views

Open layers 3, map.on('moveend',..): Differentiate between user interaction and map.setCenter() calling

I am implementing OL for a GIS application and want to add a 20 seconds timeout when the user scrolled the map, after which the GPS auto track function should resume. For that I am utilizing the ...
7
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3answers
26k views

How to make work tablet integrated GNSS (GPS) on Windows 8 with QGIS?

I have tablet - Dell latitude 10, running Windows 8, with integrated Broadcom GNSS Receiver BCM47511 (GPS,Glonass...). Because it is integrated GPS and Windows 8, there is the "new" way of providing ...
1
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1answer
142 views

Calculating radius of curvature and banking angle when set of lat, long and elevation are given?

I have set of lat,long and elevation values with me. Can you help me find the Radius of curve and banking angle. Formulae may be provided as an answer.
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5answers
2k views

How can I get my GPS track data into a graphics program?

I'm using a Garmin Edge 705 bike GPS/computer unit, which produces .gpx files. I can use the standard software it comes with to plot on Google Maps etc, but I'd like to be able to output just a vector ...
2
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2answers
173 views

Compass Navigation With ArcGIS SDK for iOS

There's a sample provided by esri named GpsSample (I can't find a way to upload it here) Anyway, the sample includes multiple selections for mapview's locationDisplay autoPanMode property I'm trying ...
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1answer
26 views

What are some automated techniques for cleaning bad data from a GPS track log?

I have been having some problems with "bad trackpoints" in the track logs I've been creating, especially in bad signal conditions. In some cases these obviously jump miles away from the true ...
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0answers
24 views

Trimble Access vs. TerraFlex: Which is simpler for creating data entry forms? [closed]

I am working on an archaeological project and need to create forms for users in the field to use and take photos. I am renting a Trimble GNSS unit and can get Trimble Access for free with the unit, or ...
7
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3answers
2k views

Seeking GPS device for vehicle tracking?

I am a programmer with no connection to Geographic information, except that I work on application which uses Google Maps. I need some device, which I will be able to set in a vehicle in order to keep ...
0
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0answers
17 views

Panasonic toughbook FZ-G1 gps troubleshooting

Not long ago, I purchased the "optional" GPS module for my FZ-G1 toughbook hoping that it would be an easy install. It may be that the GPS module came defective or there are more subtle steps to the ...
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7answers
2k views

Why don't they use cell towers like GPS satellites?

If my understanding is correct, a GPS satellite produces a pretty simple signal which is basically composed of its location and its time. Given 4 of these signals, then one can uniquely solve for the ...
13
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3answers
7k views

Advanced android app for mapping and GPS logging?

I am looking for an android app able to log GPS data like coordinates, altitude, current speed and would be nice if also the GPS accuracy/number of satellites. Many GPS apps are able to display these ...
2
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1answer
23 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
8 views

Manually reducing the number of available satellites per epoch in a RINEX observation file

As part of my research I will need to test some GNSS positioning algorithms using only four satellites. To ensure this I've edited a RINEX observation file manually and for every epoch I have only ...
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1answer
176 views

Trouble Converting from a shp. to gpx file and up loading to GPS

Currently I have a series of random points within a shapefile that I would like to upload to my GPS. Every time I try to upload the points via "Save file" it come up with an error message (posted ...
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1answer
16 views

Trying to find the manual for a Sokkia GIR1000

I'm trying to track down a manual for a Sokkia GIR1000. My department has one but over the years the manual seems to have disappeared. Does anyone have one or know where I can get one?
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1answer
28 views

How to determine the closest feature to my points?

I am doing a research on transportation for motorcycles. For each trips, I have the origin points and the final destination coordinate points. I also have another landuse layer with my points of ...
0
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1answer
341 views

Field Equipment: Geneq SXBlue II with iPad and ArcGIS Collector app

My company just recently purchased a Geneq SXBlue II GNSS receiver to be pair with an iPad and the Collector for ArcGIS app. I have heard great things about the submeter accuracy of the unit; ...
0
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1answer
2k 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?
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0answers
28 views

QGIS : How to add points from GPS stream data

I try to place points on QGIS using the GPS plugin but it does not like me. GPS stream is good, I have the read on the data on port com 66, QGIS seems to be good with it since it locates correctly ...
3
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0answers
63 views

GPS points displaying in the wrong place [closed]

I'm trying to help a student by importing an excel table of Lats and Longs into Arcmap, but they are displaying in the wrong location - I am also a bit suspicious of the coordinates. I imported the ...
2
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1answer
247 views

iPhone app to record 3D location information

Does anyone know of an app that would run on an iPhone or iTouch that would record the X,Y and Z information from an external GPS? I am using a Dual XGPS150 Bluetooth receiver. The GPS will record ...
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1answer
498 views

How to extract GPS information from Garmin Cam 20 video files

I just got a Garmin Dash Cam 20 and recorded some videos with it, and also confirmed that Garmins own player can show the GPS information on a Map. I cant seem to find any technical information on ...
3
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0answers
31 views

Uploading Shapefiles to Garmin?

I am trying to upload shapefile polygons onto my Garmin 60Cx GPS. I use the Trace tool and load shapefiles via Minnesota DNR's application. There are almost always gaps in the shapefile on the GPS, ...
1
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1answer
221 views

What is a good, small GPS data logger that stores accuracy information?

I'm looking for a small GPS data logger for geotagging photos, and I've had trouble finding one that meets my requirements: Small, key-fob size would be ideal. It should also store its tracks on ...
0
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1answer
12 views

Global Raster over GPS Data

i want to build a global raster over all GPS coordinates. The cells should be like 20x20 metres... I want to write an java application and 'work with'/adjust that raster later on. For example to get ...
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0answers
45 views

GPS Location in Chrome

I am wanting to utilize a high accuracy GNSS position in a GIS data collection application optimized for Chrome running on my Android device. The problem is that the device doesn't have Google Play or ...
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0answers
55 views

Drawing route on google map using gps device and calculating actual distance?

I Want to draw route on google map with the help of gps device and calculate the actual distance. Can anybody help with this? public GoogleAPIModel GetDistance(string origin, string destination) ...
1
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1answer
42 views

Connect / Disconnect GPS device via PyQGIS

In QGIS I would like to establish a connection to my GPS device programmatically (not via button in the GPS control panel) I found out how to get available ports with QgsGPSDetector i.e. ...
2
votes
1answer
297 views

How to use OpenLayers Geolocate with the OpenGeo Suite Client SDK?

I’d like to have GPS functionality added to my OpenGeo Suite Client SDK application. From what I understand it should be possible to use the Geolocate control from OpenLayers. Preferably there ...
2
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3answers
72 views

Why does GPS not give any info before it has a fix?

All GPS devices tell me how much positioning error there is in the fix (e.g. 12 meters). Then why does it not tell me anything before it has a very accurate fix? When a device is looking for its ...
2
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1answer
57 views

Time of the gps fix in GPGGA sentence is always rounded

I am using QSTARZ 818XT device for my app. I am using GPGGA sentences to get the GPS fixes, but I have noticed that timings are always rounded like xxxxxx.000 - for 1Hz GPS frequency and xxxxxx.x00 ...
2
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1answer
63 views

Accessing GPS from QGIS 2.14.1/Python 2.7 /Windows10

I would like to access the device described at QGIS live GPS tracking /recommended hardware (GPS USB stick) via QGIS/Python. A gps module does't seem to be part of the standard installation of python ...
3
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2answers
116 views

QGIS live GPS tracking /recommended hardware (GPS USB stick)

Is there a list or any other recommendation of certain GPS hardware (esp. GPS USB sticks) working with QGIS? I have been off this topic for far over a decade, and i remember that in former days not ...
0
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1answer
57 views

How to identify a series of Longitude and Latitude coordinates for a building? [closed]

I have hundreds to thousands rows of data that includes the GPS coordinates of the specific location (includes building footprint and outside the building within the property survey boundaries as well ...
2
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2answers
403 views

Store GPS trace with timestamps, then interpolate location by time

I'd like to: Load a 1-second interval GPS trace (not GPX) into PostGIS Then query the table at sub-second accuracy (about 5Hz), and get PostGIS to interpolate the location by time. Is this ...
1
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1answer
165 views

Analyzing long lat location data to find locations in proximity

I am looking for a tool to analyze location data (long lat values from vehicle GPS available). The goal is to identify locations which are in close proximity (within a circle of 30-60ft) and then ...
6
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4answers
4k views

Free MobileGIS like ArcPAD

I'm looking for open-source program like ArcPAD. I have read all questions and answers, but i find nothing. I need the program for PDA (Dell axim x51v + GPS modul) and I want mapping points (trees or ...