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

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14 views

GPS position transformation [on hold]

I have a GPS receiver which should ultimately give me the position of an object. I would like to get a position of an object next to it with difference in altitude and x-axis. I should be getting ...
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11 views

How to know whether my Panasonic FZ-G1 have a GPS module? [on hold]

I just got this panasonic fz-g1 I need to develop an app using GPS coordinates but I am not sure that there is a GPS module in it? How can I check that it is present? Checking control ...
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14 views

Vector file with photo direction arrow

I need to make a shp file with photo points incuding link to each points photo and at the same time should each point have an arrow pointing in the direction the photo is taken. As the photo ...
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1answer
21 views

Hand-held GPS to which I can upload imagery and shapefiles?

We've been struggling with Garmins. We can upload imagery and data using a phython script to create a KMZ file then drop it onto the GPS. It kind of works (much better on the newest units, barely on ...
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15 views

GPS parity algorithm for RTCM messages

I hope this is the right place to ask such a question. I am trying to encode some RTCM messages and they happen to be using the same parity algorithm as GPS (see section 20.3.5 in IS-GPS-200H; I've ...
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1answer
54 views

Need to include GPS data in a GIS system

I work for a small telematics company and we received a request from one of our clients about integrating their vehicle GPS locations to their ArcGIS system. Our current system simply displays this ...
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11 views

Mapserver general question [closed]

I am completely new to IT technologies and Mapserver. How long do I need to master it? My goal is to make an online tracking system with GPS
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0answers
8 views

How to set datum in GPS connection setup window in ArcFM Viewer for ArcGIS Engine Application

I have a custom application based on ArcFM Viewer for ArcGIS Engine. I want to use an external GPS receiver with that application and the setup window does not let me choose a different geographic ...
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1answer
25 views

NMEA-2000 Message 129540 (“GNSS Sats in View”): SNR field is integer or decimal?

If you're familiar with the older NMEA 0183, there was a "GSV" record for reporting information about GPS satellites in view, including their SNR (signal-to-noise ratio, also known as ...
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70 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 ...
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8 views

Implementing WaterML2 output in my web service

I'm trying to implement WaterML2 output for my sensor network webservice. Currently I report sensor data where the data includes IDs for each sensor, time of sensor readings, units and, optionally, ...
2
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1answer
49 views

Sub-meter Bluetooth GPS units and ESRI Collector App

We have been using Trimble XT/XH for years now, but we are at a time when we need to upgrade and do not want to drop another $8000 for another Trimble that only causes us headaches and not very user ...
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0answers
14 views

Capturing GPS coords in EXIF header for JPEGs with ArcPad ImageBox control?

Problem with capturing GPS locations in EXIF header for JPEG photo using Esri's ArcPad and its ImageBox control. I have customized forms for ArcPad. I have added three ImageBox controls to a form ...
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0answers
24 views

Show multiple points and lines in Garmin GPS Map

I have two shapefiles that contain (1) 30 point features and (2) an extensive road network (line features) that connects them. I would like to show all data at once in the mapview of my Monterra ...
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1answer
54 views

How to choose GPS setup? [duplicate]

I need some advice on choosing a GPS setup to map estuarine habitats in the field. Our SA estuaries are often very narrow (1 to 2 km wide) and habitats are small. We distinguish between supratidal ...
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2answers
74 views

gpspipe returns correct timestamp, but wrong date (21 dec 1995)

I'm having this strange issue where my gps pipe is returning the correct location and time but the wrong date (including year). For reference, at the time of writing it is 06 aug 2015, 09:27 UTC). ...
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0answers
43 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 ...
2
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1answer
28 views

How to prepare and upload points/lines to GPS using QGIS 2.8

I would like to upload some points (e.g. locations of transmission towers) and lines (e.g. streams, roads) in .shp format to my Garmin Oregon 600, using QGIS 2.8.2. Could anyone provide with ...
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1answer
40 views

How estimate or get the value of PDOP from HDOP value?

I have a gps device that are reporting me the HDOP value and the number of satellites around, but I have as requirement to get the PDOP also, the GPS device doesn't give that value. Can I get PDOP ...
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0answers
12 views

Magellan GPS stops recording data in suspend mode

Currently having a problem with my Magellan Explorist 510 GPS unit. After I start recording the track on the unit, after some time, it just stops recording data in suspend mode (which should turn ...
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0answers
23 views

Recommended GIS/GLONASS chip?

As a cyclist, I ust satnav extensively, whether for riding around the city or travelling. My Galaxy Nexus smartphone isn't very good at GPS, while my GPS+GLONASS-equiped Nexus 7 tablet (second model, ...
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0answers
19 views

How to fit gps trackings to a line with a known heading?

I have gps trackings that I know they fall into a certain pattern - a line with a known heading. How do I find the line that minimizes the distances of the points from it but is in the correct ...
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1answer
29 views

GPS points of a vehicle snapped to a specific polyline path [duplicate]

So I have been capturing bus GPS locations for a while now, and I am became interested in snapping them to their corresponding polyline (route). While at first this seemed like an easy enough task I ...
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0answers
28 views

match noisy GPS data to closest linestring in road network [duplicate]

I have some noisy GPS data(Points) that they are not exactly on the road because of the noise. But I want to match them to the closest road linestrings. How to do this in PostgreSQL? Data: ...
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0answers
24 views

Are there methods of filtering gps-data with metadata?

In our project we captured GPS-tracks from a few electric vehicles in the timeframe of a year. In total we captured around 13000000 GPS-points this way. The captured data comes from electric powered ...
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26 views

How to create displacement vectors in QGIS using GPS points with different dates?

Is there a way to calculate and visualize displacement vectors in QGIS ? I have DGPS points taken at the same place (ground control points), but their position moved over time as they are located on a ...
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26 views

How to map locations to the nearest road

I have say 10 positions (lat and long).These locations will be off the road. How can I map/project these locations to the nearest road using MATLAB.
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2answers
60 views

What mathematical processes does a GPS receiver use to determine position?

I'm writing a report on the mathematics of GPS, but I'm wondering what methods the GPS actually uses. What I've done is set up the four sphere equations and solve them using the Newton-Raphson method ...
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1answer
104 views

How to locate property corners using plat map description?

I am interested in a piece of property for which I have a plat map description, giving what seem to be latitudes/longitudes of lines along the boundaries (not sure about this). The objective is to ...
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39 views

How to use NewSQL Database with GPS tool with Node.JS as server side programming

I am a web project manager and I want to create a website to show current position of cars on the map (google or ARC). I know how to create the website, but I don't know how to fetch the longitudes ...
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69 views

Do countries have a Latitude and Longitude range?

Do countries have a Latitude and Longitude range?. Is it possible to get the latitude and longitude range or boundary for each country. UK lat and long is 51.5000° N, 0.1167° W. What is the ...
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40 views

Make a line from a set of GPS points close to a specific GPS point with PostGIS

I have to develop a map-matching algorithm. At the moment I only match GPS points with the closest road segment. I'm looking for a way to compare the directions between a GPS point and a road to ...
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0answers
27 views

Calculating the distance between a set of UTM coordinates [duplicate]

I would like to calculate the distance between several GPS points, these data are projected into UTM Zone 30. I am using Postgresql 9.3 but I am happy to see results with any software or website such ...
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13 views

How do I get a return value when calling GPSBabel from C#

I have some C# code that calls a GPSBabel command line to convert a NMEA file to a GPX file. The code works and the conversion happens. The problem is, how do I get a return value indicating success ...
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1answer
37 views

Trimble Pathfinder Differential Correction: ‘Uncorrected’ for block of GPS data

I’ve been collecting GPS point data without problems over the last few months. Recently, on two dates, after using Pathfinder differential correction, the exported records’ Corr_Type changed from ...
2
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1answer
95 views

Get vertice information and apply to line segments using ArcGIS for Desktop (or QGIS)?

I've recently started tracking bike treks using Strava and I thought it would be interesting to do some analysis on my treks. I am able to import the GPX file into ArcMap and convert it to a point ...
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0answers
45 views

Understanding Latitude Jumps

I'm decoding some AIS messages and outputting KML files showing routes. Looking at some ships in the Adriatic Sea there are some weird Latitude jumps that I don't understand. Several ships show ...
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1answer
49 views

Is it better to take the elevation of a GPS unit or that of a Digital Elevation Model?

When searching of gps routes in wikiloc, for the trailrunning race "Transvulcania" I have several routes to look. I downloaded a lot, but every route has a distance between 71 kilometers and 74 ...
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13 views

Speed Dilution Measurement

I would like to verify the accuracy of the speed measurements from GPS. I know that normally vDops, hDops, and pDops or even accuracy read from the GPS are the sources for checking the accuracy. ...
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1answer
79 views

GPS data -tracking analyst

i have GPS data from 15 trucks for one month. The data include (location x-y, speed, altitude and vehicle_id). I have used tracking analyst to visualize the data but i need to group them by day to ...
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39 views

Is it possible to find Lat,Long coordinates of points within a polygon whose GPS coordinates is known [duplicate]

I have a set of gps coordinates which make up a polygon. Is it possible to find Latitude,Longitude coordinates of points within this polygon using GPS coordinates of the polygon I already possess. ...
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44 views

suggest me some good online coordinates converter for GPS NMEA data!

I want to check my GPS conversions from NMEA format to decimal degrees and vice versa. Can anyone suggest to me some online GPS converters for quick reference where I will get entire conversions by ...
0
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1answer
75 views

How to convert negative NMEA latitude and longitude values ('S' and 'W')?

I'm getting from GPS data in the form of NMEA. There I'm getting positive latitude and longitude values('N' and 'E'). How do I convert the negative latitude and longitude values('S' and 'W') into ...
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73 views

Using GPS to field walk through a LiDAR scene

I am doing field surveying for archaeology using Lidar. If I attached a USB GPS to my laptop would it be possible to track where I am "in real time" on the Lidar as I am field walking? I'm wanting to ...
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0answers
32 views

Interpolating a set of GPS points on ellipsoid earth model

I have a set of GPS (latitude, longitude) co-ordinates along with the time at which the coordinates were collected. Additionally, I have the speed and the heading of the vehicle at those coordinates. ...
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0answers
28 views

How to calculate the covariance matrix of an RTK GPS system?

I am currently working to integrate an RTK GPS system into a sensor fusion framework. The framework is based on an Extended Kalman Filter, which is why I need an accurate estimate of the measurement ...
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0answers
58 views

Length of a long distance GPS track

I have a list of GPS points logged by a vehicle and I'd like to find out the length of the logged route. The problem is that the vehicle logs only every 10 minutes, so I don't have too many points to ...
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67 views

Creating custom maps for Garmin Oregon 600

I have a Garmin Oregon 600 GPS receiver and a map I made in QGIS. Where can I find a step-by-step guide to getting this map onto my GPS unit? A static JPEG or PNG map is fine since I'm not interested ...
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100 views

GPS tracking data string format for GRTQ device

I get GPS data from tcp (php socket), but for some devices (GRTQ) I will get an unreadable string. First devices sends: ...
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46 views

analysis of GPS measurements

I would like to design something like a filter to reject the GPS measurements with low precision. I know that calculating the distance and acceleration by the given velocity and coordinates might be ...