Problem in getting speed and direction in gps

[darwin_cyriac]

I have started a project using gps and the coding is in j2me.I can locate the device in a map by getting latitude and longitude values. Time is also accessible.But when am trying to access the speed and direction the value getting is NaN.The code I have used is location.getSpeed(); and location.getCourse(); Where location is an object of type Location....So What I have to get the exact values of speed and direction...

[petrib]

Maybe a stupid question, but are you actually moving when you run your app and try to get the speed and direction?

[Den123]

Hi,

I also have problems with getting current direction of movement - the result is always NaN. So I wrote own algorithm:

http://wiki.forum.nokia.com/index.ph...on_of_movement

[darwin_cyriac]

Actually all other values are getting correct...when am moving, latitude and longitude values are getting updated and I can map it correctly but only problem is with speed and direction...Only these two methods ie location.getSpeed(); and location.getCourse(); return NaN. This much portion is become a trouble for me...Need help from you.

[darwin_cyriac]

Hi,
Thanks For ur reply..But would you please tell me whats actually,TReals type is it a long value or in degree minute second or some other format...I don't know much more about that calculation....

[Den123]

You should use long values for calculations. When you receive values of latitude and longitude - they presented in decimal system and it is good for calculation. But if you want to show latitude/longitude in dialogs you should translate them into deg, minutes and seconds.

This article contains small example:
http://wiki.forum.nokia.com/index.ph...how_a_landmark

[darwin_cyriac]

Hi, Thanks for ur help...
I have made little changes to my code and now am getting the speed and directions from the device using location.getSpeed(); and location.getCourse(); methods. Below the changes that i made....
* cr.setSpeedAndCourseRequired(true); where cr is an instance of Criteria.
Before this I hadn't even set this. at that time its take its default value as false.that means doesn't required speed and course.

Anyway thanks for your valuable sugestion.

[gpslive]

Thanks Darwin, very good information ! I was thinking my 6110 navigator doesn't provide this speed information, and it was a criteria default setting... I'll test it soon in my app.
Yann

Hi, Thanks for ur help...
I have made little changes to my code and now am getting the speed and directions from the device using location.getSpeed(); and location.getCourse(); methods. Below the changes that i made....
* cr.setSpeedAndCourseRequired(true); where cr is an instance of Criteria.
Before this I hadn't even set this. at that time its take its default value as false.that means doesn't required speed and course.

Anyway thanks for your valuable sugestion.

[leom32w]

I'm shopping for a GPS phone. Forget maps, speed, and voice directions. I want the equivalent of a low cost Garmin hand held device. I want to walk out into the middle of nowhere, establish a waypoint, walk to point "b" and know the direction and distance. All without subscribing to the provider's service (AT&T)

[A.A.M.]

Hi leom32w,
Welcome to the Forum Nokia Developer Discussion boards. This forum concentrates on development related issues. You can try to post your query at Nokia Support Discussions board - http://discussions.europe.nokia.com/