Re: Simple question on X/Y to Lat/Lon

Hi Rajesh.M,

"Rajesh.M" wrote:
>
> Hi ,
>
> I have a very simple question. I want to create a "Custom icon"
> which is rectangular in shape and has a length, breadth of say
> l,b pixels. The user can select this icon say through a menu.
> After selecting the icon he would place it on some LAT/LON
> position(mouse click). I have to display a dialog showing some text
> information
> based on the rectangular area now selected.
> Assuming that i create a new MouseMode for this purpose..
>
> What i would like to know is
> What are the steps required to
> 1)Find out which LAT/LON was clicked.?

You can use the projection.inverse() methods to go from screen x, y to lat/lon.

> 2)based on l,b what is the LAT/LON area selected.?

This can be tricker - in what units? It also depends on the line type
you use for your rectangle (great circle, straight or rhumb). If you
want ground area, I think you'll need to find a spherical area algorithm.

- Don

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