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

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Find Minimum Bounding Box for a set of coordinates [duplicate]

I am working with GPS tracks (lat/lon values) and my goal is to compute the minimum bounding box for a small geospatial library I am working on. The datasets are not huge, maybe a couple of tens of ...
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24 views

Valid Range of Geoidal Separation in GNS and GGA sentences

I haven't seen any information about valid ranges of geoidal separation in GGA and GNS sentences. I am using Nema Studio Simulator to simulate GPS receiver. In there Geoidal Separation can be set to ...
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234 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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21 views

Is there any standard or source of information to check for valid ranges and accuracy of each information conveyed in NMEA format ?

Currently I am reading IEC 61162 Nmea 0183 standards document. In there there is not information about valid ranges of some values or precision of data fields in nmea sentences. Is there anywhere that ...
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4answers
785 views

Android devices and apps with support for Galileo positioning

While the European's Galileo positioning system is only expected to be fully deployed by 2020, the first positioning made using already deployed Galileo satellites was made back in 2013. Also, ...
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299 views

Detecting and fixing outliers in a GPS trajectory

I need to find an algorithm or method that can detect outlier latitude longitude points in a trajectory during post-processing, which can then be fixed (brought back into the trajectory's path based ...
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1answer
82 views

How to generate missing points in GPS trajectories?

I have some GPS trajectories that include gps locations recorded on variable frequencies (every 1 min ,5 min , 20 min,etc.)using a geographic projection WGS84. In my work, i need a fine-grained GPS ...
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1answer
45 views

Is OpenStreetMap suitable for me?

I'm planning to create a map with GPS and routing support as well as other custom features for my local area. It will be for a commercial usage. I'm okay with showing OpenStreetMap logo in my app. Is ...
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185 views

Import GPS SINEX (for velocity analysis) into Sarscape or processing with others software

I try to import GPS snx. into Sarscape 5.2 (use GPS Import tool) and getting error 115) ) gps_type : [sinex] 116) ) generate_kml : [OK] 117) ) generate_shape : [OK] 118) ) ...
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44 views

Correctness of Measurement

I tried Google, but the questions isn't that easy to put in Google, so I haven't found anything about this. I am making a database with different locations (latitude and longitude). For this I have ...
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33 views

convert a gpx file to a feature class loses ident field

Using the ArcGIS 10.3 gpx to feature tool (GPX To Features (Conversion)) the "ident" field is lost in the translation. DNR Garmin is an option but has limits to the number of points it can process ...
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1answer
53 views

Accuracy calculated by GPS

I found a lot of pieces of an answer to this question, but no complete and good one. How does a GPS System calculate it's own accuracy at the moment? Where does it get the known position to ...
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23 views

Navigator for ArcGIS integration with a laptop via bluetooth

Does anyone know how to integrate Navigator for ArcGIS with a laptop via bluetooth to display location information/point locations from a web app residing on a laptop? Or can I just call the ...
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2answers
57 views

Matching Street names with GPS data?

I have a list with over 10000 street names and places. These street names indicate where Radar Speed controls are located in Germany. I Need to have a map, where those Points are tagged. I did this ...
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1answer
77 views

Calculating emissions from points in road network using ArcGIS for Desktop?

I have GPS data (X,Y, speed, CO2 and fuel consumption) for one truck for one trip. I want to import them in ArcGIS and to join them with the road network (map matching). I was thinking of applying "...
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36 views

How do I translate gps sports data into a representative plane

I'm hoping to use qgis and postgis for a project but I'm unsure of, how to not only frame the question but accomplish the task. If I have gps data from 1 runner on an oval track but who has run on ...
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2answers
78 views

Collector blue accuracy ring- what does it show?

What, definitively, does the blue accuracy ring show in Collector. In the field it always seems too large to represent the accuracy that the GNSS app is stating (ie 50cm – 1m). The blue ring seems to ...
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1answer
333 views

Transforming coordinates from WGS84 to Gauss-Krüger 5

GPS coordinates in the format of WGS84 are quite common. I need to transform them into Gauss-Krüger coordinates but I have no idea how to do that. The only things I know are that it is not easy and I ...
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0answers
34 views

Displaying current position using QGIS?

How can I display my current position in the QGIS canvas, similar to the "blue point" in google mapsa? I need this to navigate to defined points and I do not want to change the program all the time.
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1answer
63 views

Calculating distance to a fixed point on a map

I have a point with latitude 40.7127837 and longitude -74.00594130000002 I have imagined this point on a plane like this Latitudes run from West to East and longitudes run from North to South Can ...
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1answer
67 views

How to find records using a distance filter, in a table of Points?

My table fields are: POSIC (id, geom, dt_inclusion). DB is PostGIS. Data comes from a GPS Source, then i can create a route ordening the points by Date_Inclusion. So, lets say i have registries A,B,C ...
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1answer
54 views

Set proximity requirement for ESRI Collector observations

I am trying to create a Collector map that allows field crews to update a "status" attribute for features in a feature class. What I would like to do is limit the features that can be edited by the ...
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3answers
95 views

What view of sky is required for RTK GPS

When using RTK or differential GPS technologies, considering the Base has a clear unobstructed view, what view of the sky is required to be able to get an accurate fix with the rover when is moving (...
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0answers
66 views

Add telemetrics to gps file format

I've created my own data file using gps information and loads of sensor data. I'd like to create a gps file which will add this information to the geographic location. Unfortunately most common gps ...
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1answer
145 views

Getting the compass point given longitude, latitude and direction in degrees

I have this data gathered using a GPS device No. Time Longitude Latitude Speed(Km/h) Compass point Direction (deg) 1 10/20/15 1:34 40.11724 -3.21032 11 Northwest ...
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62 views

Synchronizing coordinates from GPS to central server

I have developed a tracking system using a GPS device connected to a Linux box. It collects the coordinates as it progress. It's done with a python script, which is listening to the GPS device and ...
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2answers
239 views

Find country from GPS coordinates, offline using python

I'm aware that there are several similar questions already but I have been searching for days and not been able to solve my problem: All solutions I've found require GDAL, which I have not been able ...
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0answers
75 views

High-level method for offline future road elevation data

I am new to GIS, so please do not hesitate to call me out in providing limited information. I have a .tiff Terrain (elevation) data file for the east coast of the US and a .osm.pbf OSM file for ...
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73 views

Plot ENU points on a map having an origin GPS Lat and Long

I have a GPS coordinate point to denote my origin: 8.6258,47.3325 Then I have a series of ENU (east, north up) points in meters that represent the distance from my origin: -10, -1 //East, north (...
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20 views

Updated GPS coordinate shows rotated point

So I have a GPS coordinate: 8.6258,47.3325 Which I use as my origin. Then I have the path of an object that has been moving around based on the ENU position, say: -10, 12 //east, north in meters -...
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13 views

Increment GPS coordinates by a certain distance given in meters [duplicate]

Say I have this point: 45.1200,10.5000 From there I want to create another point that is 20 meters north and 10 meter east from the previous point. Is there any equation I can use for doing this?
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1answer
41 views

problem with the import of a gpx file in any program

I have difficulties to import one particular gpx file. I got it via email and it displays some tracks. 10 segments and 5500 waypoints. i tried as follow: QGIS, also with GPSBabel Google Earth ...
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1answer
27 views

Entering Track from Garmin to GIS not getting basemap and orthomap to line up with Track?

I collected a GPS path on a flight and I would like to condense the path to the place where we landed and took pictures (condensed area at base of map; I want to delete the other part of the line). ...
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1answer
129 views

Connecting Garmin GPS Device to ArcMap?

I Have a problem regarding connecting my Garmin GPS 18x USB to ArcMap. It is not working.Can you tell me any advice.
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1answer
32 views

Offline Playback of Vehicle in OpenStreetMap

How to do offline playback of routes traveled by a vehicle using postgis in OpenStreetMap when the coordinates are given in JSON format? I am getting gps data from gps device in json format but it ...
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1answer
266 views

How to get all gps points on a road from osm data?

I'm trying to extract gps points on roads in a region. For each road, I need a gps point on that road every 10 meters. I'm aware that Google Map API offer such way points, but due to the latency-...
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How can I quantify whether locations of one 'type' are closer to one another compared to a second 'type'?

This might have an obvious answer but I'm new to GIS and can't seem to find the right technique... I've got GPS points for a bunch of households and have calculated the distance (in km) between each ...
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163 views

How to get GPS coordinates of neighborhood polygon from Google Maps?

Does anyone know how I can find the GPS coordinates for neighborhoods like this: https://www.google.com/maps/place/SoHo,+New+York,+NY/@40.7236448,-74.0006793,16z/data=!3m1!4b1!4m2!3m1!...
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24 views

Time Difference of Arrival

I am trying to implement indoor positioning system in Matlab. Does any one know any simple method to find the time difference of arrival.I have 6 references and one target.Need to find the time ...
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2answers
424 views

In hyperbola model of how GPS equations are solved, why do 3 satellites give only 2 hyperboloids and 4 satellites only 3?

The Hyperbola depiction of how the GPS equations are solved: From several psuedoranges measured at the same time, we can calculate the (absolute) difference in the distances between us and these GPS ...
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48 views

GPS point elevation vs Contours layer elevation

I have some survey grade GPS points whose elevation is approx 55 feet lower than my contours layer elevations. I am using 1 ft contours and comparing point elevations with contours in the same ...
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1answer
199 views

Is there an industry-standard official mapping of Galileo satellites to global "PRN”/ID values?

In the U.S. GPS system, satellites are identified by the PRN number broadcast by each satellite. This ID is usually visible on most GPS receiver platforms that provide access to individual GPS ...
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1answer
2k views

Using Python to compute the distance between coordinates (lat/long) using haversine formula and print results within .csv

I have a .csv file with 3 columns. The first column is titled Distance and it is empty. The second and third columns are titled Longitude and Latitude which contain coordinates, for example: Distance,...
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31 views

How to find the most accurate street/road by a given coordinate and some previous locations?

I'm building an application that gets user's position and tracks its changes while driving providing some information stored in shape file. To get the most accurate information from this shape file ...
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0answers
27 views

Trouble interfacing Garmin Foretrex 101

I have trouble interfacing my Foretrex 101 GPS unit using my Lenovo laptop through the vendor's PC Interface Cable. I suspect that this has to do with the virtual COM port setting (The laptop has ...
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20 views

Metrics and features for comparison of aggregated trail dataset

I have hundreds GPS traces generated by cars for single road in the city from direction A to B. And I have hundreds of GPS traces generated by people which organized in trail in the mountain from ...
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1answer
95 views

Separating disjoint GPS path segments in Postgres

This involves a lot of code; if it's better suited for StackOverflow, please let me know! I'm working on a project involving trips that are constructed from GPS coordinates. I'm mapping the recorded ...
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1answer
272 views

Calculate road distance between GPS points

I am working on tracking system that track location of vehicles on the map and tell their total distance from the beginning till today. I have device_id, timestamp and GPS location in the table like ...
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40 views

2 Lat/Long Segments Defined By 4 Lat/Long Points - Calculate If They Intersect & How Far Along Segment They Do

I have 2 lat/long segments defined by lat and long end points. For example, I have Segment X (defined by A.lat, A.long and B.lat, B.long where A and B are end points) and similarly Segment Y (defined ...
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166 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.