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

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GPS Datalogger with USB Interface and GPX Output

I'm looking for a reliable, robust and reasonably priced GPS datalogger, to measure time, distance on tracks. The logger should be reasonably priced but ready for outdoor activities. Mud, dirt, a ...
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GPS post processing - Differential Correction

I have a large set of collected GPS points that I'm pulling into Arcgis from SQL and creating an xy event layer to then map them. The fields for the points are as follows: recorded, lat, long, ...
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What is required for post-processing differential correction? (And can Garmin units provide it?)

2 very closely related questions about differential correction with a Garmin unit: 1). Some data was collected using a Garmin GPSMAP 76Cx unit and the data collectors are interested in whether ...
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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 ...
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316 views

API to suggest nearby streets

For an app I'm developing, I want to use the phone's GPS to locate it. I then want it to list streets that are nearby. The customer might be in his back garden for example, and this may be closer to ...
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GPS Module Without Velocity or Altitude Limitations

I am looking for a GPS module that I can use in a high-altitude project. The problem I have discovered is that GPS manufacturers are required to place a set of restrictions on GPS modules. The ...
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Distance calculation : Integrating incremental gps data

I am trying to build a GPS based odometer based on android. Currently , I am calculating incremental distance changes very frequently ( < 5 meter movement). The distance calculation in android is ...
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How to calculate Bearing between two GPS points

The following returns 150 degrees using C# converted from JavaScript Bearing formulas, but Google earth returns 210 degrees for the same values. The broken code is GetBearing() but I've also included ...
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266 views

RINEX specs and OS library

Is there any OS library to read/write/process RINEX data? I've been wanting to start a OS library to read and write RINEX, which is something I need for a project, but not actually post-process them. ...
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Point interpolation in route

I have a set of GPS coords with X,Y and Course. I need to interpolate additional points based on the course of each point. It would be a simple line intersection based on lines drawn using the 2 ...
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Trimble GeoXH, XM, XT - Data logging without Terrasync or GPSCorrect?

Is it possible to capture data for post processing on a Trimble GeoXH, XT, or XM without using Terrasync or GPScorrect? Specifically I would like to create a RINEX file. A Trimble 4000 series receiver ...
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252 views

Proper work flow to move manholes and pipes to surveyed location

I would like to know how to accomplish the following task using QGIS. I have an existing point shapefile representing sanitary sewer manholes and an existing polyline shapefile representing sanitary ...
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86 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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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 ...
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251 views

GPS tracking and Web mapping?

We are developing a tracking software and we are the stage where we test the reliability of our location stigma on the following web-maps Google Map Nokia HERE Open Street Map (OSM) We observe ...
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GPS Elephant Tracking II: Is ArcGIS basemap imagery orthorectified?

-- For my original question and pictures of elephants wearing GPS equipped anklets, go here. -- I'm experimenting with the use of GPS anklets to track the movement of zoo elephants. This has proved ...
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463 views

How to show a geoTiff on an iOS application?

I'm developing an iOS application that will use offline maps. These maps are on GeoTiff format but I don't know how to do it. I've found this question: How to display a GeoTIFF on mapView but it uses ...
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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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GPS data based track/trip calculation algorithm available?

Currently I'm receiving position data of moving assets every 90 or 120 seconds (depending on the asset). What I'd like to achieve now is to detect standstill and movement phases (tracks/trips) on the ...
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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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Distance between GPS coordinates

Given a database of GPS points, a center GPS location, and a radius R (in meters), how can I find all points in the database that are within a distance of R of the center point? Will the distance ...
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Garmin GPS 78 Interface

Does anyone know how to interface a Garmin GPS 78 Marine GPS with their computer to manage waypoints (upload, download, save, etc.) Previously I was using the MN DNR Garmin tool, but it no longer ...
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Advantages of a GPS enabled PDA for field asset management

I'm having some trouble trying to convince some people of the advantages of having a entry level GPS enabled PDA for asset management. I've been asked to look into GPS enabled cameras, I've since ...
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Why is GPS almost unavailable without a data connection?

When travelling to foreign countries, ie. when a data connection is unavailable because I don't want to spend big bucks using a roaming data connection, I noticed that GPS is virtually never ...
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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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Sending GPS Location to server

Is it possible to send my current location on iPhone or Android to the server so that others can view my current location?
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GPS capable rangefinders or cameras that can capture lat / long data from a distance?

Anyone have experience using this technology? i.e. field verifications of structures where you need to capture the lat / long of a house that is 1000 feet from the road with limited access.
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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 ...
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Is it necessary to use a third party service for serving this case?

I have been assigned a task to help build a mobile app, which only shows terrain view of map with a fixed (min/max) zoom level based on mobile phone position and moveable markers which are provided ...
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2answers
224 views

Several questions about using spatial data?

If you have spatial data for SQL server, can you use the spatial data (both geometry and geography) in another application for instance ESRI ArcGIS? Is spatial data a standard that every GIS ...
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1answer
190 views

How can I get the GPS info from a PNG?

I am trying to get the GPS data from several hundred PNG photographs for display in Q GIS (so need to access the EXIF data). The online and downloadable viewers I have tried haven't yielded much ...
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52 views

List of actual GPS position

I have a question - where can I find a list of actual GPS position, for example - ships, airplanes etc. I need it for my project for College - I will create mobile/desktop/web app, which will show ...
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141 views

How long for surveying quality GPS to get accurate 3D position information

I recently read an Ordnance Survey Blog article that seemed to suggest that it was necessary to leave the GPS device in use for four hours to gather requisite data. I am aware that "domestic" GPS ...
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767 views

How to upload polygon shapefiles to my GPS?

I used QGIS to create a table (*.shp) containing 3 polygons. These polygons represent "forbidden zones" that I would like to export to my Garmin GPSmap62st so once on the countryside, I'll can see my ...
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What is the minimal data necessary to reconstruct GPS location?

Imagine that a minimal GPS device is attached to a moving object (animal, shipping container, geocache object, etc). Every few months, data from the device is downloaded for post-processing. What ...
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is the GPS network free or available for any device?

I have a question (I'm really sorry if is kind of dumb question). But if I have a device with GPS (smarthphone,pda,pocket pc, etc) Does the device need any additional service to enable GPS data? I ...
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770 views

GPS drift during the receiver is stationed

I have developed a GPS Tracking device it is working fine when the receiver is in motion, when it stationed in a position for couple of hours i get some drift for around 10-15meters. The receiver send ...
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Alternative to Terrasync for Trimble Windows Mobile unit

I have a number of Trimble Nomad 900 series devices and am currently using TerraSync. TerraSync does the job, but are there any other alternatives out there that would be even simpler to use? ...
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in seach of gps tracking (web) service to use with rails web app

hey out there GISers, i am looking for a gps tracking service i can hook gps devices into and request their infos via a ruby on rails webapp. does anybody know some? any help is appreciated! thanks, ...
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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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Can ArcGIS Desktop or ArcPad use the Windows Location Provider?

Are there any plans for ArcGIS Desktop or ArcMap to get the GPS Coordinates via the 'Windows Location Provider' in Windows 7/8 instead of reading a virtual com port?
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GPS device taking pictures and saving heading + HDOP?

I'm looking for a device that can do all of the following: Take picture Save lat-long GPS position + heading (angle to North) of picture [so need tilt-compensated 3D compass], in exif or other ...
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1answer
219 views

How can a single line be computed from multiple possibilities

I have datasets containing continuous GPS streams of data that represent routes or trails. For any given route, I probably have at least 5 (in some cases many more) different sets of data. Given that ...
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What is a .ssf file?

What exactly is a .ssf file? I am refering to the .ssf files used with Trimble GPS units. I am aware that it is some sort of post processing correction file, but I do not know more than that.
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GPS waypoint mapping with android phone

I am a bat enthusiast and volunteer regularly with the local bat groups on bat surveys. In them we record bats with a bat detector - making a note of the different species (there are 18 in the UK), ...
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1answer
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How to connect particular sets of points with (poly)lines?

I think my problem is quite easy to be solved by the most postgis-users, but i am a bloody beginner: i have a timestamped point-table representing GPS-tracked places of different cars. To distinguish ...
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1answer
174 views

best bluetooth gps for marine applications

What is the best gps to get as an add on for an android (asus tf300)? This is for a marine application I am writing. I need sub 5 meter accuracy. Would like decent accuracy at moderate speeds. I ...
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set wrong GPS unit in “degree” and want to change to “meter” in GIS while editing

I want to edit the GPS result in ArcGIS, but I found that there is a problem. I set the wrong unit while I used the GPS outside , and the unit is "degree". Although the coordinate system is correct, I ...
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How to get the layers of my project to show while tracking with GPS?

I've been using/testing several versions of various GIS software and run into occasional issues. Right now, my biggest with QGIS is with GPS connection/downloading from/tracking. These are all ...
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Difference between Garmin eTrex Legend HCx and eTrex 30?

I have used etrex Legend HCx a lot and been satisfied. Now I've seen etrex 30 just for a while and it seems to me that the Legend is much more user friendly, good old menus with a lot of ...