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

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Looking for a good solution to have GPS position on KMZ files on Android platform

I'm looking for the best solution / app on the android platform to show my GPS position over a KMZ file, possibly offline. Here is what I've tried to do: Google Earth Android app I downloaded KMLZ ...
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1answer
182 views

How to convert gps receiver native format to google lat long or XY format

I have received some GPS co-ordinates in the following format like - "17267690N 078279340E".. How to convert the co-ordinates to show it on Google map.
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54 views

GPS positional, and quality data collection using QGIS

I was wondering if it was possible to record the position along with some of the quality control data in a table when using the GPS information functions to collect some mapping data. I would like to ...
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1answer
2k views

How can I convert Horizontal dilution of position to a radius of 68% confidence?

I am working at mobile app that uses external GPS module. What I need is to calculate accuracy for the fix from GPGGA command to be able to compare it with my mobile platform's GPS accuracy. Mobile ...
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1answer
119 views

How to know the exact country or province from the longitude and latitude information automatically?

To be more specific, how to find all of point (from 1,000,000 items) located in England, or located in California? I need to process over 1,000,000 items, so a offline and automatic way is needed. ...
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1answer
54 views

Why is “Add feature” of the GPS Information tool inactive for some of my PostGIS layers?

Sorry If I rise it again on this forum but I couldn't find any info on limitations/requirements of "GPS Information" tool for QGIS (2.2.0) against data layers. For some layers I'm able to collect ...
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2answers
75 views

Identify circuits/loops in GPS track data

This question will be naive and uneducated, but I gotta start my research somewhere, so I'll ask for references and pointers... Let's say you have a GPS time series with a set of lat/long coordinates ...
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1answer
639 views

What will happen when Russia shuts down the GPS stations?

Russian officials are seriously talking about shutting down US GPS ground stations within their borders and Deputy Prime Minister of Russia tweeted on the subject. What will happen to the GPS? My ...
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1answer
133 views

GPS and One-way Streets

I'd like to know how GPS can determine if a street is one-way. Does it detect one-way signs or parked car positions if any?
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1answer
117 views

Adding tracks to gps with QGIS feature attributes as name

I am attempting to send a vector layer to a garmin gps in QGIS. I am using the GPS Tools extension and have created a new GPX layer. I can add waypoints without any issues, but when I copy features ...
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1answer
176 views

Pure html based indoor navigation

I would like to locate (position) people inside buildings without forcing them to download a native app. I'm focusing on iOS and Android devices. I therefore thought about wifi triangulation ...
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1answer
186 views

Add GPS tracks directly to a PostGIS table

Disclaimer: I am a total GIS newb and I have a use case I have not seen elsewhere. Background: I drive country roads looking for old building, cemeteries, school houses, etc and I record the ...
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1answer
71 views

Adding GPS tracking data from Excel into QGIS

Sorry if this is an easy question! I have added GPS points in QGIS however all of them are the same colour. I want the points to be coloured differently for each individual. How do I do this? Thank ...
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2answers
226 views

How to find when train nears station? [closed]

I am creating an app for tracking trains. When the train comes near to a railway station the system should identify it. To do that I want to gather GPS coordinates near the station and save them. ...
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0answers
110 views

GPS tracking using smartphones [closed]

We're looking to launch a study that examines spatial behaviour on a university campus. Given the near ubiquity of smartphones among our study population, we're excited about the possibility of using ...
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1answer
135 views

Taxi fleet simulation - MATSim a useful tool?

I am working on a university project and I would really appreciate some advice: My project consists in modeling the taxi fleet of a major city and investigating if replacing a percentage of the fleet ...
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1answer
262 views

What is relation- difference and/or similarities between PPP, SBAS, GNSS, RKT?

Recently i came across lot of terms such as IGS, GNSS, GPS,PPP, WAAS, EGNOS, GLONASS, CORS and many more ... I know some of them I can group them such as GPS, GLONASS, GALILEO . And then there is SBAS ...
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1answer
83 views

USGS Earthquake GPS Metadata: Buffer Zones & Python

I'm making a python web crawler that gets USGS earthquake GPS data, and I'm wondering how I should process the latitude longitude pairs to see if it falls within a specified radius of a specified GPS ...
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1answer
156 views

Converting unknown type of coordinates to lat/lon

Our company is using Total Station (Surveying Machine using SOP) to calculate GPS coordinates and its results are something like this Easting: 3250193.00, Northing: 1115573.00, Elevation: 656.00 ...
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1answer
77 views

Hand-written coordinates from a Garmin NUVI

I've been asked to map point data that was collected in the field by manually writing down the coordinate from a Garmin NUVI 1490 LMT. They were put into a spreadsheet and sent my way which I was ...
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3answers
183 views

How can I add 3 axis orientation information to my photos?

I have a survey project where I need to record not only the location, but the direction (bearing and angle of elevation/depression) that the camera was pointing at the time the picture was taken. ...
0
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0answers
103 views

How do I export sensor records from a Trimble GeoExplorer to a mapping program?

So I am fairly new with the GIS world and could use a lot of help!! I am currently surveying with a Trimble Geoexplorer 6000 XH What sort of mapping program can I use to export sensor records to ...
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0answers
80 views

Convert GPS to cartesian and scale to a bounding box

I've little knowledge about geographic systems and i'm gonna try to explain my problem the best i can. I've gps coordinates captured from a mobile device WGS84 store in a file, each file stores a ...
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1answer
270 views

Calculation to convert db data to Lat/Lng degrees

In a database I have the following Lat/Lng data. I wish to convert it to a readable format. 177514245:34726053 => S 32 7.3947, E 115 51.4245 177513828:34726948 => S 32 7.3052, E 115 51.3828 ...
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1answer
354 views

Automating the production of GPS-compatible map tiles from georeferenced raster maps

I have a set of TIFF maps that I want to load onto Garmin GPS 62s units. The maximum size for each tile on the GPS is 3Mb and less than 1 million pixels. I manually produced one tile, following this ...
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1answer
88 views

GPS suitability

I was wondering what type of GPS/GNSS receiver should I use for recording and mapping trees in a particular farm (inventorying trees). Will handheld GPS like Garmin do the job? Or should I go for the ...
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2answers
763 views

Accuracy vs Precision GPS

I am doing some research on consumer grade GPS accuracy and precision. I took 5 readings for 20 known locations (100 readings). Am I correct in assuming that the standard deviation between the 5 ...
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0answers
97 views

select by attributes in modelbuilder while using iterate?

I have crated a model that iterates GPX-files from a folder and works through it and gives me a raster as output with pixel values after how many tracks passes through each pixel. This works the way ...
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1answer
229 views

How to convert distance into latitude + longitude [duplicate]

I have start point (latitude) I know direction, lets say strictly north, and I want to calculate latitude which is 100 meters above the start point. The same for longitude. I believe there should be ...
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1answer
125 views

How can I change the coordinate system of gpx-points?

I'm working with qgis, v. 2.0.1. I have some points from a gps device (Garmin) and they already are in the .gpx format. Now I have two problems: First, I can't open the gps-Points with the "gpx-tools" ...
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0answers
290 views

how to combine GPS track logs using modelbuilder?

I'm creating a model to import GPS tracks(.GPX files) into ArcMap, this is to create a network of driveable off road vehicle routes. I've manage to do some of the things I'm trying to do, but there ...
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2answers
118 views

Finding points that are within a set distance of other points

I have a large point file: several thousand. They are all GPS coordinates, recorded at different times, by different people. Many of them have unique data. So, for example, there will be one ...
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1answer
289 views

Calculating “travelled distance” of a GPS track without including “stops”

I have a set of GPS tracks from a cycling event and I want to correlate their distance along the route. Problem is: when a rider stops, generally by entering a covered place, GPS keeps logging (low ...
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32 views

Garmin conversion track

I have problem when import garmin GPS tracks with software for Android. I found this code: public static int importTracks(String path, Context context) throws ClassNotFoundException, IOException { ...
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3answers
5k views

How to capture accurate GPS points using mobile devices?

I'm currently working in Vietnam as a climbing guide, but am putting my GIS skills to use by doing a side project for the company involving the mapping of climbing routes. Along with another employee ...
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0answers
152 views

Why Does Cold Start Take So Long?

I know very little about how GPS works. I noticed that after disabling GPS mode for a few days, even while standing on a street in the city, it can take several minutes for GPS to show my location, ...
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0answers
94 views

Location Data in TAIP Format to Geoevent Processor

We are testing whether we can get the surveyed cordinates in a Trimble GPS transferred online via TAIP format ( Trimble exchange protocol) to ArcGIS Geoevent processor . For this , one main concern ...
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1answer
119 views

How to calculate “stop points” from a set of GPS tracklogs?

I have a set of GPS tracks pertaining to a cycling event that happened in the same day. I don't have much geographical information about the event itself, except for the tracklogs I downloaded from a ...
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0answers
35 views

GPS Coordinate Handling

I have a text file with consecutive coordinates of gps data for ongoing and incoming route(on Same road). i want to convert them in line format. how can i normalise those extra coordinate so that i ...
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2answers
153 views

Osm2po : Querying generated table to get the closet line from a point

I generate the OSM data of Africa postgis and I want to launch queries for a list of gps points to project them into the closest line. I made this request to a single point but took around 3 ...
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1answer
275 views

how to create a network from gps tracks?

I'm trying to build a network from several GPS-trakcs, to digitalize hiking routes on my land. I have several GPX-files from routes I've tracked with the gps. I managed to display them in Arcmap ...
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1answer
126 views

Aligning two layers captured in different coordinate systems

I have two layers, one of points (locations of fruit trees) and one of Atlanta zip codes, in an ArcMap, but the layers are not aligning. The zip codes are in the top right and the fruit points are ...
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1answer
180 views

Automatically panning the map in ArcGIS when using the Time slider

I have a point dataset with time-stamps at 1 minute intervals showing a driving route. I have enabled the Time properties of the layer and I am able to use the Time slider to see the points move ...
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2answers
2k views

Why is the GPS Reference Meridian 100m to the East of the Prime Meridian?

Apparently if you stand at Greenwich then your GPS will not say you are at longitude zero. This is because the GPS reference meridian is about 100 metres to the east of the prime meridian. My ...
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2answers
77 views

Finding routes in which more than one car passed (gps data)

I'm using ArcGIS 10.1. I have point GPS data of routes of several cars over a few days, and I want to find only the routes where more than one or two different cars passed through (Each GPS points ...
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2answers
262 views

Is there a consumer-level handheld GPS that can use standard GIS data as its background layer?

I'm shopping around for a handheld GPS, and from what I'm seeing, none of the big vendors (Garmin, Magellan and Delorme) make a unit that can use, for example, a simple georeferenced TIFF or a ...
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152 views

How WiFi can tell my exact location? [closed]

There is no GPS installed in computer PC/laptops. Please let me know how WiFi can show my exact location.
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2answers
2k views

What class/types of smartphone chipsets support GPS, A-GPS, GLONASS AND have extended kalman filtering?

I've been testing several Android phones (all running Android 4+) Sony Xperia T, Moto G, Nexus and HTC 1 which are all giving decent tracks (all of which use GPS/GLONASS) However we are also using ...
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1answer
82 views

European route E4 in geodata format

Good morning, Has anybody locate any kml, shp or gpx file with the complete European trail E4 ? Lots of google search navigates me to nowhere ... Dimitris
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157 views

Interpreting U-Blox GPS receiver data

Currently I'm writing software for a simple device for car, which will compare car's location to database locations and alert user. I'm using U-Blox 5 series GPR receiver. Reference manual is here. ...