Thread: Problem with GMT offset.

I want to write a program that takes input as latitude and longitude of a particular place and gives output as that place country GMT offset. I have done gmt=longitude/15. example: (Chicago) latitude=41.85N, longitude =-87.65W , GMT= -87.65/15 =>-5.8 but chigago actual GMT is GMT-5(this is country based). so how can i decide that which range of lat and longs comes under which country?and how to get Actual GMT. Its not the rounding problem, if i round that to -6 ,then that is GMT offet for other country.. is there any java api's to find location, based on lat longs?? please help me.

Do you know how you would do this without a program? As in, if you had to do this using only a piece of paper and a pencil (and whatever other resource), would you know how?

If so, write out what you would do, and you'll have a pretty close approximation to an algorithm.

If not, google is your friend. I don't really understand what the problem is, so perhaps writing out your problem a little more clearly would help also.

The short answer to your question is: no, there isn't an easy way to do this.

You're going to need to rely on a webservice that gives you the timezone for a given city, or a data structure that does the same, possibly from a third party library.

Other than that, google is your friend.

Originally Posted by sush

Okay, is there any web service code to find city/place name by using inputs as latitude and longitude?

Probably. Like I said, for questions like that, google is your friend. We would just be doing the googling for you, which isn't smart because you know your requirements better than we do.