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

learn more… | top users | synonyms (1)

2
votes
1answer
42 views

Download from GPS / changing SCR / still not working

I use a GARMIN GPS; I download my points from the GPS by using GPS tool; I "try to" change projection (SCR) by changing layer property/specify SCR Still, it not working and I cannot view my layer on ...
0
votes
1answer
264 views

What is correct entry to Input Location (GPFeatureRecordSetLayer)*?

I use: http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Network/ESRI_DriveTime_US/GPServer/CreateDriveTimePolygons/execute What is correct entry to Input Location (GPFeatureRecordSetLayer) ...
15
votes
1answer
288 views

How can I statistically calculate the “real” road from a set of GPS tracks

I participate in a long-distance cycling club, and we started to collect GPS data routinely from our riders. My interest is to calculate "the real trajectory" for future events based on accumulated ...
18
votes
4answers
2k views

How to create a polyline-based “heatmap” from GPS tracks?

This winter I am planning to track my downhill skiing/snowboarding using a GPS. Most of my riding will occur at the same resort. I would like to be able to create a sort of "heatmap" that shows the ...
1
vote
1answer
65 views

Need gps trackers for social science research [closed]

I'm interested in studying people's movement over time (24 hours), and would like to do so with devices that also measure elevation very accurately. I understand there's stuff out the where I can buy ...
0
votes
1answer
386 views

How to calculate surface area of highland region using DEM with ArcGIS (ArcEditor)? [duplicate]

Am shyaka from Rwanda. I use GIS tools and have all required data to perform or calculate surface area from the polygons that have been given by GPS (Trimble) with ArcPad 8. I originate from a high ...
0
votes
0answers
87 views

Free GPS tracking tool for sierra wireless pinpoint x modem or any idea?

I have a sierra "wireless pinpoint x" modem with gps. Do you know a free tool to track in a map or retrieve the coordinates in order to make a kml file to create a map of where i was. Do you know how ...
0
votes
1answer
47 views

GPS NÜVI 50 -Garmin

I would like to know the accuracy in degrees (not feet) of the latitude and longitude coordinates that the GPS NÜVI 50 gives for a point.
3
votes
3answers
131 views

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 ...
1
vote
1answer
267 views

Import GPS data (text documents files) to QGis

I want to import GPS data (text document files) in to Qgis, what file format are you suppose to use ?
2
votes
1answer
158 views

QGIS: Colour GPS track by speed

sorry íf I might ask this question the 101 time, but I didn't found anything with google or SE. I have a CSV file with WGS84 trackpoints and visualizing them with QGIS textplugin works fine. The log ...
1
vote
1answer
251 views

Conversion from NZMG to latitude and longitude

I want to convert NEW ZEALAND MAP GRID coordinates i.e. Northing and Easting into WGS84 coordinates i.e. Latitude and Longitude. I have searched on internet but there is no proper explanation of how ...
1
vote
0answers
51 views

GPS alarm system for my boat [closed]

I need a GPS alarm system for my boat, in case of theft. Maybe notifying me any anomaly on iPhone. How are they called "GPS Tracking" ? I actually don't need to track my boat while sailing, but just ...
2
votes
0answers
106 views

Adjusting GPS collected data to a polyline shapefile

I am collecting data from a GPS that is attached to a car. When I display this data in a map, the set of collected points are supposed to match with the street shapefile. However what I see in my map ...
12
votes
3answers
1k views

GPS Tracking by SMS

I have a GPS Tracker which sends the GPRMC string of the NMEA 0183 protocol, at fixed periodicity, to a predefined number as SMS. I am looking for a software which can port these incoming SMS to a COM ...
1
vote
2answers
1k views

How do I download tracks from the GARMIN GPSMAP 78 usin DNRGarmin?

I have been able to download waypoints to DNRGarmin by accessing the GPX file. However, I have only been able to view waypoints. How can I download tracks?
1
vote
1answer
210 views

Android GPS: average location resolution time

What is the average location resolution time on a SmartPhone(Android) GPS? Assumptions : The user is under the open sky.
0
votes
1answer
65 views

Converting an Experian (Geoconcept) file to GPS coordinates

I'm working with a file containing Experian data which was used in Geoconcept. The file describes a serie of microzones, that is polygons. Unfortuntely the coordinates system is hard to understand: ...
0
votes
0answers
48 views

Issues for 3D length using GPS road tracking for undulated topography

We are tracking road network for undulated topography using Trimple Juno GPS. Is it any problems for 3D length using UTM projection? Thanks to Advance
3
votes
3answers
806 views

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 ...
0
votes
1answer
152 views

Unable to reference GPS waypoints correctly in ArcGIS

I'm working on a project. Waypoints were taken in the field with a Garmin Dakota 20. I've tried two different ways of putting them into ArcGIS. One way is through converting the GPX file to a ...
1
vote
0answers
343 views

Calculating Accurate % Grade from GPS Coordinates

I am trying to calculate % Grade from GPS points. I am using the basic equation of (Rise/Run)×100 The problem is I am getting spikes in my GPS data (example 1 meter rise for 3 meter run), I am ...
3
votes
0answers
60 views

what criteria should I consider in buying a pocket GPS

It's my first time making this kind of choices, and I really don't know how to go with a choice or another. I basically know that it should have good durability , a good battery life and good ...
2
votes
1answer
223 views

Transformation from WGS1984 to ITRF2008

We are using Projected Coordinate System: Ain_el_Abd_UTM_Zone_39N (Transverse_Mercator) in our GPS Devices and have valuable Coordinate data. Can I change the projection of this data this to WGS 1984 ...
7
votes
3answers
507 views

Recommended driverless GPS loggers?

There are a bunch GPS loggers out there, but a good portion need software to download the data onto a computer. Some of the software is Windows-only, but others are Mac-compatible (what I need). ...
1
vote
0answers
82 views

QGIS GPS bluetooth connection

I have setup a Haicom bluetooth gps on a machine running Windows8 and have used GPSGate to create some virtual COM ports. I have valid data arriving at the COM port, but then I run QGIS and try to ...
1
vote
1answer
157 views

Which application generates *.MAG, *.MOB and *.CAR files?

I have following type of files (I have tried FME too.I think they are DGPS generated file?) ".MAG" , ".MOB" and ".CAR" extension files many more ".SES" ,"ERR", "LOG" several I have attached files ...
1
vote
0answers
54 views

How to measure area of polygons generated from gps data in qgis? [duplicate]

Somebody classified my question as a duplicate. But applying the answer doesn't work for me. Here is what I did: - I made sure that my layer is in a projected coordinate system (UTM30N, WGS84) - I ...
2
votes
1answer
77 views

Where would a perfectly vertical vertical tunnel through the earth come out?

I am a programmer. I have a point P1 (lat,lon) given by GPS (WGS84) and I want to know the location of a point P2 if I make a straight line from P1 to the other side of the earth. I have read some ...
1
vote
1answer
466 views

convert GPS to x,y using reference node

i am using sensor nodes and their antenna to calculate GPS coordinates as notation of (degrees/minutes/seconds), i have some question of how to do these things: how can i convert latitude and ...
2
votes
0answers
93 views

Should 2D Positions and 3D Positions be considered conceptually different entities?

Let's suppose we want to model GeographicPositions, described by coordinates or coordinate tuples inside some Coordinate Reference System. Also, these would be put inside some sequence to represent ...
2
votes
2answers
554 views

how to make a line from a set of gps points?

As a part of my research I need to create the trajectory of respondents according to the their collected GPS data (including X and Y). I am familiar with python programming, but I am a beginner in ...
1
vote
0answers
95 views

Literature on the appoximation of trajectory points with (smooth) curves

We are gathering trajectories of GPS points of moving objects (cars, bikes, etc.) and would like to compute approximate curves (that may self-intersect) that would represent those clouds of points. ...
2
votes
1answer
1k views

Current time from GPRMC or GPZDA?

In GPRMC there is a time field, called fix time. Can I consider this always the same as value from GPZDA time? Is there any possibility that when GPS device is configured to stream both GPRMC and ...
3
votes
0answers
354 views

Are there any shapefile-based GPS data recorders?

I am looking for a data recorder that can be programmed to send a serial data request to a field computer and then accept and record an incoming data string and tie it to GPS location and then save ...
1
vote
0answers
202 views

How to import raster data in GPS with Arc GIS

How do I see the map on GPS as a background layer? In QGIS, I could see the map which is converted from shape file & raster data on QGIS with "Garmin Custom Map". I need to do the similar thing ...
7
votes
2answers
452 views

How to Georeference Photos With No Spatial Reference?

I have about 100-200 field ground shot photos I would like to overlay in ArcGIS 10 that have no spatial information which I need to somehow develop using a photogrammetric formula. The camera was ...
6
votes
2answers
163 views

Survey Data to GIS database

This is a General Question on a possible workflow for Survey Data directly to ArcGIS In most GIS/Survey workflows there is a field collection team and backoffice GIS team. When the availability of ...
3
votes
1answer
216 views

QGIS: plotting real time lat/lon GPS input on a different projection

I'm trying to plot realtime GPS over a satellite image in QGIS 1.8. The GPS data is coming in as NMEA lat/lon from a Garmin Etrex. This works when the image is in WGS84 lat/lon projection and ...
1
vote
0answers
93 views

Kalmanfilter GNSS IMU

I want to make an uncoupled Kalman filter. The input data are GPS and the output of my strapdown Algorithm from the IMU. The Strapdown Algorithm is used to calculate the actual position and velocity ...
22
votes
7answers
7k views

Is there a good GPS track analysis library?

I keep writing custom code to work with GPS tracks: GPX files and NMEA logs from my phone, dedicated GPS logger, etc. I feel like I'm reinventing the wheel and am wondering if there's some standard ...
1
vote
0answers
48 views

windows function with points in a mixed (multipoint/point) table

I have a table comprising multipoints (tracks) and points (stops between tracks). there can be several consecutive multipoints. now, i want to merge any points lying very closely to each other ...
1
vote
0answers
90 views

Summing time spent on effort from point GPS data tracks in grid cells

I have one layer of point data representing GPS tracks collected during vessel surveys (an individual survey is indicated as the time between departing and returning to shore and there can be more ...
1
vote
4answers
141 views

Count consecutive points in a polygon

I have animal relocation data and want to know how many times that animal walked within a polygon for more than one step (i.e there is more than one point within a polygon). I am more interested in ...
0
votes
3answers
231 views

Length of forms in ArcPad10

I'm trying to create a survey with about 250 questions in ArcPad 10. Normally you would expect that a form you created in any application will be able to scroll in PDA if it is too long. But the ...
3
votes
3answers
212 views

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?
1
vote
0answers
460 views

GPS Coordinates to WKID 102100

I'm currently creating a project for ios and I'm using the latest ArcGIS IOS api. I have a mapView that is using the spatial reference skid 102100 and i am receiving lat long coordinates from an ...
3
votes
0answers
77 views

Ways to measure similarities/congruence of tracks (point features) in ArcGIS

I have a sets of GPS coordinates recorded while tracking different cross country runners. What I would like to do is to compare how similar the tracks of the individual runners are. Is there a test ...
1
vote
0answers
658 views

Uploading Polygon Shapefile to Garmin GPS. How to View all Polygons?

I am trying to upload a polygon shapefile to a Garmin 60CSx unit. The polygon shapefile is a small area containing polygons of vegetation types. There are are 53 polygons (records) in the shapefile. I ...
6
votes
2answers
2k views

What algorithm should I use to remove outliers in trace data?

I have GPX traces and want to remove outlying observations. There are some routepoints that are impossible because it would require acceleration that the vehicle can not achieve. Are there good ...