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

learn more… | top users | synonyms (1)

1
vote
0answers
77 views

How to calculate a missing (one or more) lat/long value of a bounding rectangle?

Is it possible to calculate an unknown (one ore more) latitude/longitude value of a bounding rectangle. The log file that I need to process provides a pair of lat/long values for Upper left and Bottom ...
3
votes
1answer
346 views

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), ...
0
votes
1answer
968 views

Convert Degree Minutes to decimal degrees [duplicate]

I have location points collected from a garmin device stored in an excel sheet in Degree Minutes format --- W00208.172,N1046.977. I am looking for an Excel formula to convert either to Decimal Degrees ...
1
vote
0answers
44 views

Applying SBAS corrections properly

The SBAS standard, RTCA-MOPS, contains lots of unclear information. I am trying to implement SBAS corrections by the help of EGNOS SDK which is an open source software by ESA. When I apply long ...
1
vote
0answers
63 views

What is the relationship between Map Service Instances and SDE connections?

We have a GPS project based on ArcGIS Mobile 10.0. There are two web map services and each were kept as Nonpooled with Minimum instances 15 and maximum instances 60 by original developer. The database ...
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) ...
0
votes
2answers
80 views

Add waypoints to ArcMap using GPSBabel

I've been trying to add waypoints to Arcmap for some while now. I have a Mac OS X 10.6.8 and have finally found GPSBabel that is compatible with mac. My current problem is to convert the waypoints ...
1
vote
1answer
234 views

How to improve accuracy or extrapolate missing or bad GPS points

Is there an easy to use freeware tool to postprocess my location data, in order to correct 1) location errors (or improve accuracy not based on differential GPS correction) and 2) deal with missing ...
2
votes
1answer
87 views

Open Source + Offline Geo Notebook

I am looking for an open source offline software to record points of interest that I might visit at a later date. Let's say I am reading a book about Alaska, I'd like to take notes about interesting ...
15
votes
1answer
287 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 ...
1
vote
1answer
64 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
0answers
85 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.
2
votes
1answer
90 views

How to Deal with Overlapping Coordinates in Statistical Analysis

I decided to make an archaeological map about certain tombs distributed in the area of Crete and make some statistical analyses using the spatial statistical tools of GIS. Specifically, I'll be ...
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
266 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
157 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 ...
0
votes
1answer
124 views

Not able to convert GPS coordinates received from a software into Latitude and Longitude

I am working on a software which returns GPS coordinates in this format: Lat : '48684499' Lon : '5203474' I can not understand what type of coordinates are these and not able to convert them into ...
1
vote
1answer
249 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
2answers
285 views

Vehicle tracking by QGIS

I need to do routing for a vehicle. A map with detailed turn-by-turn driving directions should be generated. For example, it should be like car race game in which the map with vehicle tracking is ...
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 ...
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: ...
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
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
0
votes
2answers
206 views

how to load gps information in my map and track way points?

i am using QGIS 1.8 in ubuntu 12.04 . i am working with ROBOTIC OPERATING SYSTEM(ROS) and QGIS simultaneously . My ROS system is connected to LIDAR(sensors) that will publish gps message so i could ...
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 ...
2
votes
1answer
131 views

iPhone app to record 3D location information

Does anyone know of an app that would run on an iPhone or iTouch that would record the X,Y and Z information from an external GPS? I am using a Dual XGPS150 Bluetooth receiver. The GPS will record ...
4
votes
1answer
267 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 ...
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 ...
1
vote
0answers
30 views

How to tell if a device supports Assisted GPS, and if how to get the Assisted GPS cooridinates?

1) Is Assisted GPS implemented at the hardware and OS level, or is it a hardware and secondary software thing. I've never used this so wondering what is required to 'access' this. I noticed a wiki ...
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 ...
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
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
2answers
660 views

How can i convert from local coordinates to coordinates gps?

i don know if this is the right place to publish this. i am working with business object tool traying to make a kml file to be imported on google maps. I dont know much about geographic systems, but i ...
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 ...
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
1answer
549 views

Is there an industry-standard official mapping of GLONASS satellites to “PRN” values?

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

How to use OpenLayers Geolocate with the OpenGeo Suite Client SDK?

I’d like to have GPS functionality added to my OpenGeo Suite Client SDK application. From what I understand it should be possible to use the Geolocate control from OpenLayers. Preferably there ...
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 ...
3
votes
1answer
215 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
4answers
1k views

How to match GPS collected data to routes on Google Maps?

I am using Google Maps to implement a GPS Monitoring system of data collected from vehicles. My problem occurs when the points and lines do not match with the route and cut through other streets and ...
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 ...
7
votes
2answers
451 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 ...
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 ...
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 ...
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 ...