Iam sorry but Iam not aware of UTM lattitude and longitude nad how is
it different from the normal one.Iam not using google maps..Its an
application where in for a particular screen coordinate I need to get
the corresponding world coordinates(reverse of projection) and from
there fetch the latitude and longitude value of that fix.

As said by Kostya I will go through unprojection. :) :)

On Jan 17, 11:25 pm, Larry Mackey <[email protected]> wrote:
> What world coordinate system are you using (UTM, Latitude and
> Longitude, ???)  Calculations are fairly straightforward  if you are
> using UTM but tend to be more complicated for Lat/Long.
>
> You need to establish a datum reference on the screen you can use.  If
> you are bringing a map onto the screen the map needs to be registered
> and scaled in world units
>
> Are you using Google Maps or ??
>
> Larry
>
> On Jan 17, 6:54 am,prachi<[email protected]> wrote:
>
>
>
> > Hi
>
> > Im developing an augmented reality application where in I need to
> > perform the opposite of converting world coordinates to screen
> > coordinates....
>
> > I have the screen x,y value and i need to fetch the corresponding
> > world coordinates(x,y,z) for the same.
>
> > Ny idea how to do dis???- Hide quoted text -
>
> - Show quoted text -

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