GPS is a space-based satellite navigation system that provides location and time information.

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What's the smallest device able to interface with a GPS unit?

For GPS units that talk over USB, what's the smallest device you could plug the GPS in to in the field, in order to upload from the device to the GPS and download from the GPS to the device? Netbook? ...
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1answer
18 views

Is it possible to create a GPS track in QGIS and if so, how? (beginner question)

I'd like to use QGis as a trip planner. Once there's a topographic map on the screen - from whatever source - I'd like to point-and-click a track over that map, then export it in a common GPS format ...
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19 views

Exporting massive gps tracks to a map

I have about 1000 vehicle equiped by a GPS sensor and 3G connection. Each vehicle feeds a csv file -using 3G connection- with its current location every 5 sec. Each vehicle have its own CSV file. ...
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1answer
39 views

Why are my DMS points plotted way off from their true locations?

I'm having a bit of a nightmare plotting some GPS coordinates in QGIS. My coordinates came from a PDF so it took a little wrangling to extract the from the PDF and convert them to a CSV file. I've ...
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7 views

GPSLogger problems [duplicate]

I am using GPSLogger to record my tracks but I can't convert the KML files to Shapefiles. Does anyone know how to do this with? Are there any other good apps that record track logs?
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16 views

Is it possible to display labels in background files (.imp) on Trimble GPS units?

I have been trying to figure out if this is possible for a while now. I know if you load a file in as a data file, you can click on a feature and the label will pop up. However, you cannot view a data ...
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30 views

Calculating Distances between coordinates

I have perused through the other questions that are very similar to mine but am still having some trouble. I have 75 coordinates in WGS84 that I brought in from an Excel table. They are now on my ...
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1answer
46 views

How to detetmine county of GPS coordinate?

I have a SHP file that contains all counties in the USA. I also have roughly 100 million GPS locations. I need to tally the number of GPS locations per county. A linear search through the counties ...
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1answer
26 views

Mobile GPS location and CAR GPS location showing different outcome

I want to make a CAR positioning system. I wrote a program which can show me the coordinate locations on a map. But when I get coordinates from MOBILE GPS and from CAR GPS, they both differ. Why ...
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2answers
31 views

Measuring Continuous Distance of GPS track in ArcGIS Desktop

I am looking for a way to quickly measure the distance covered of GPS tracks of foraging Seabirds. A tool that could give accumulative distance of point to point from the long and lat coordinates ...
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1answer
27 views

how to display movements of a moving object in cartodb

I have few GPS tracks with lat long and timestamp. I want to present them on a map and to show how the movement took place using the time series location values (X,Y,T). I searched a lot but could not ...
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1answer
27 views

How is Precise Point Positioning (PPP) exactly done?

I am looking for a positioning accuracy that is higher than normal consumer-grade GNSS receiver (mostly GPS/GLONASS hybrids with +- 5m precision). I came across RTK with dual receiver setup (base ...
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1answer
40 views

Calculating the fastest routes and some points on the same time

I have two drivers and each driver has a set of about 15 locations where they need to drive to on a single day. Calculating the shortest route for both drivers is not the problem (using a matrix ...
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27 views

Is there a method to tell which hemisphere a point belongs to, in WGS84 geoid, where the equator is an arbitrary ellipsis?

I use the WGS84 geoid (because I'm working with a GPS chip). I define an ellipsis that splits the surface in two parts, lets name these 'A' and 'B'. This ellipsis is defined by two points 'a' and ...
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140 views

Cheapest centimeter accurate satellite positioning (GNSS/GPS)

I am looking for a cheapest possible GNSS/GPS setup with a centimeter precision without much HW hacking. I am not able to produce my PCB or do any soldering (though I would do that if there is no ...
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0answers
42 views

Translating hdop, pdop and vdop to metric accuracy from given NMEA strings

How can I translate dilution of precision to a metric unit? For example: say I got 1.2 in hdop from NMEA sentence of my GPS receiver, in what should I multiply to get a metric accuracy? Just like the ...
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1answer
61 views

Problem measuring area with gps coordinates

I am trying to measure area from gps coordinates but fail to get the correct result (7200 square meters). I used the formula from this post but I get way too high number as result (should be in square ...
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3answers
79 views

How to clean/edit GPX (tracks) files recorded from GPS device?

During a long trip, I have recorded tracks of my journey with the GPS of my smartphone. I have ended up with about 30 GPX datafiles. Now that I am back, I am trying to draw a map of this trip. I ...
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35 views

How does Mobile GPS work in Windows Tablets?

Can anyone tell me how GPS chips generally works in Windows8 Tablets? As far as I can tell Tablets do not have a separate GPS chip like those in handheld GPS receivers - It seems to be combined into ...
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1answer
27 views

leica zeno 5 gps handheld

I recently purchased the Zeno 5 gps handheld device form leica geosystems. I would like to ask if anyone knows what other software I can use except the one they offer that integrates with ArcGIS ...
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3answers
41 views

exporting metadata from gps camera to spreadsheet

I have a question involving exporting metadata from a GPS camera to an application such as a spreadsheet. In essence, I'm working with a significant number of images taken with a GPS digital camera. ...
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2answers
62 views

What gps app to use for mapping bus routes?

I'm looking for a GPS app for android to capture waypoints and lines. I'm going to map the route buses and the stop points. Which GPS app is recommended for marking “points” and marking the “lines”? ...
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1answer
66 views

Accuracy issues between data in QGIS and Google Earth

Wondering if anyone can answer this question. I have a kml in Google Earth. When I import it to QGIS, and then import the Google Earth images they are in slightly different places. I used a QGIS ...
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1answer
180 views

Extract one GPS fix per day from data?

I am in the fortunate position of having 2 years worth of animal movement data. With such a large amount of data I would like to extract only one fix per day to make it easier to work with. Data = 14 ...
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1answer
53 views

Are latitude and longitude independent of each other or correlated?

I want to develop a bivariate gaussian kernel in order to handle the random noise in my GPS tracks where each point has three parameters (lat, long and time stamp). I was wondering if latitude and ...
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1answer
90 views

If the GPS navigation message takes 12 1/2 minutes to cycle, how can receivers update your position every second?

According to Wikipedia's article on GPS, Each GPS satellite continuously broadcasts a navigation message... Each complete message takes 750 seconds (12 1/2 minutes) to complete. My ...
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1answer
41 views

Rotate the map to GPS heading / direction in ArcGIS using ArcObjects SDK 10 for .NET

Assuming I use ArcGIS or an ArcEngine application on a mobile PC. Is it possible to rotate the map in ArcGIS to the direction the device is travelling using a GPS receiver? If yes, how? I would like ...
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1answer
76 views

Android Tablet KML/KMZ App for polygons w/offline & GPS capabilities?

I am looking for an Android app which allows me to view and query polygons stored in KML and/or KMZ with a GPS point representing my location and offline capabilities. My KMZ files are being output ...
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1answer
56 views

Difference between Positioning and Localization

I would like to know what are the differences between Positioning and Localization. In most papers they are used interchangeably. Are they the same? Does one come after another? I always thought ...
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2answers
105 views

Areas where DGPS with post processing (not RTK) is still required

I am wondering in which domains or countries where Differential GPS (DGPS) with post processing (not Real Time Kinematic [RTK]) is still required? It's known that RTK has been rapidly adopted by ...
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1answer
62 views

Most accurate GPS hardware for less than 1 mile radius [duplicate]

I apologize if this is a duplicate but I can't find a good answer or area to know where to find the correct answer. I am looking for the technology or hardware around wearables or similar technology ...
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0answers
28 views

Latitude & Longitude values from Simple Voyage Data Recorder [SVDR]

I am receiving values in the form of 0113.7276,N,10339.0121,E from a Ship Data Recorder. I am not a GIS/ GPS expert and am unable to decipher what do these values mean, because they are out of range ...
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1answer
449 views

Looking for an android solution for offline kml/kmz file viewer with gps support

I have some KMZ files of cadastral maps. I need to fiscally go to the boundaries of my lands (parcels) and take a look at where they are with the gps and maps support. Some of these places are not ...
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4answers
121 views

Uploading maps to GPS (forestry maps: roads, trails, hydro, polygons)

I'm using a QGIS 2.2.0 Valmiera on a Windows 8.1 system Desktop. I'm a forester and I would like to have a cheap solution to load maps into the handheld Garmin 60, 62 or 64 series GPS. Free would be ...
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0answers
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how to join 1second GPS data with dGPS using much shorter time interval?

for one of our measurements we rented a dGPS with a portable "rover". I have now our measurements from our device which also contain data from built-in GPS (1 second sampling rate) + also the dGPS ...
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47 views

Drawing Line on existant Shapefile in Geotools

I have a shapefile that is opened and looks as such: Now I am attempting to draw a line from two points I click on that map; however the code they give for the QuickStart.java example is ...
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1answer
102 views

Calculating countries flown over on flight path

Say I have two airports given. I can then get their coordinates. Now that I have the beginning and end coordinates I can draw flight-path from the two locations. Now my question is that given two ...
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1answer
43 views

Simulating historic GPS data on map [duplicate]

I have some really basic newbie questions. I have following data with me: ESRI Shape files (.shp, .shx, .dbf, .prj, .sbn and .sbx) KML/KMZ files GPS coordinates (~400k) of some cars (~50) tracked ...
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1answer
52 views

Best method to find routes from a set of points

I have lines table (postgis enabled database) representing the streets. I have collected few gps points along a route and I would like to match it with the streets in order. Scenario - I am jogging ...
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23 views

Dataset required with GPS and accelerometer data

Can anyone please suggest me site or provide me a dataset which has GPS data with accelerometer data as well.I am doing a project where using accelerometer data i am trying to improve the accuracy of ...
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0answers
51 views

I'm new to GPS, and I had a quick question about clarity.

I'm working on a project for class, and I'm mapping GPS on Google Earth with a KMZ file. I used a handheld GPS 24°6.691'N + 74°27.833'W. How accurate is my coordinates? I know I'm in decimal ...
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0answers
15 views

Use of RRC(Range Rate Control) in Pseudo Range Correction for satellite

Can anyone tell me the use of RRC in order to calculate the value of PRC(pseudo range correction) in PPK(post processed kinematics)?
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1answer
84 views

downloading waypoints from Garmin GPSmap 60cx to QGIS2.2. Am I missing a step?

QGIS2.2 64 on W7 64 is failing to download waypoints from Garmin GPSMap 60cx USB port. GPSBabel installed and the GPS Tools dialog is OK: GPS device: “Garmin serial”, Port: ”USB”, Feature type ...
2
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1answer
374 views

Converting GPS Positions to Google Maps

I have a set of GPS-coordinates in a database, which I want to compare to a coordinate supplied by the html5 location API. My coordinates look like this: <WGS84Coordinates> ...
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1answer
28 views

Post Processing Algorithm

I am working on project In which I am supposed to make a web app which will be asking users to upload their inputs as "Rinex file" of Rover and Base Station and It will give more precise data after ...
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46 views

Convert from gps coordinates to EPSG:32640

I need to convert latitude and longitude witch i get from gps to EPSG:32640 (in C#). What is best and fastest method for that? Thanx
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39 views

50m x 50m grid around the world

I'd like to subdivide the earth into a grid of approx. 50 x 50 m cells (big database, I know). To make it more complicated (and fun), I also need to be able to determine to which cell a given set of ...
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1answer
38 views

Can we manually select which satellites to use in solution? [closed]

For example, I have used below satellites ID in current solution: ID Signal Strength ______________________ 1 21 22 23 19 12 36 26 20 18 3 29 32 ...
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1answer
51 views

How should “consumer oriented” geographical applications be called?

I se the term GIS being used for professional applications, while there is a growing interest on applications (online or desktop) that use Web Maps and User-Generated GPS Data so that individuals can ...
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1answer
120 views

Project point to map with Arcpy using GPS Coordinates

I am trying to create a new layer with just a single point using arcpy. All that is provided is a gps lat and long. It seems like it should be a simple problem but I just can't get it to work. I've ...