Re: geoTiff Application

["Jeffrey Ratcliffe" <jeffrey ratcliffe gmail com>]

2008/6/2 Jamie Lahowetz <jlahowe2 bigred unl edu>:
> I am writing a simple Gtk2 application that loads a geotiff and allows the
> user to add and remove waypoints. So far the user can add a waypoint by
> double clicking and is able to drag the window to navigate. I would like to
> see if anyone can help me with adding some of the other features.
> 1. ZOOMING. I added a zooming feature to the map but when you zoom in or out
> and try to add a waypoint, the circle is far off from where the user
> clicked. Can anyone give examples on how to fix this? (thanks to zentara for
> the help)

I very much recommend the use of Gtk2::ImageView
(http://trac.bjourne.webfactional.com/) as an image viewing widget,
which will sort out all the zooming, panning, selecting for you.

Regards

Jeff