Questions tagged [gps]

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

Filter by
Sorted by
Tagged with
7
votes
3answers
18k views

How can I plot GPS coordinates on Google Map

What is the best way to plot GPS coordinates on a Google Map? Are there any tools that can do that (written in python specifically)?
12
votes
5answers
12k views

Convert XY points to a line?

Someone mistakenly saved a GPS track as waypoints and then sent them along to me in a .csv file. They want a line back (shapefile). What's the simplest method to convert this to a line? Available ...
2
votes
4answers
147 views

Where to license non-automotive POIs for France, Spain and Portugal?

qualified POIs are needed for a commercial project - should cover broad out-of-car usecases (not needed: parking, gas stations). Could be commercially licensable data or derived from national geodata ...
2
votes
4answers
944 views

ArcGIS Mobile that uses GPS location to route to a destination?

Does anyone know of an example of routing within ArcGIS Mobile 10 that uses GPS location to route to a destination?
8
votes
1answer
3k views

Calculating absolute precision confidence number from Dilution of Precision indicators from GPS receiver

End-user GPS receivers typically show an absolute confidence indication, such as Within 25 Metres, for the calculated position. I am parsing NMEA data from a GPS unit and wan't to calculate a similar ...
24
votes
6answers
11k views

Is GPS more accurate on specific hours of the day?

I have heard that the GPS system is more accurate, and less accurate on some specific hours on the day. If this is true, how can I get the information on when GPS is more or less accurate at my ...
10
votes
4answers
16k views

What data is sent from GPS satellites to receivers?

I know more or less how the GPS system works. But I would like to understand it in more details. Exactly what data is sent from a GPS satellite to a GPS receiver? I think there is multiple types of ...
29
votes
3answers
43k views

What are the major differences between GPS, GLONASS and Galileo? [closed]

What are the major differences between GPS, GLONASS, COMPASS and Galileo?