[Gdal-dev] Latitude view thinner than it should be

[Josepo Urrutia]

>
>The problem is that if you use direct lat/lon values to map on screen,
>you will suffer increasing distortion as your move away from the
>equator. If you look at globe you will see that one of the lat/long
>grid boxes is squarish near the equator, but tall and thin near the poles.
>
>The normal solution to see maps with reasonable local display is to
>convert into a projected coordinate system, such as UTM.   Alternatively
>you could hack an approximation of this by using a different pixel
>size for lat and lon directions and compute the sizes based on your general
>latitude.
>

I need to do the projection in Transverse Mercator (UTM).

I've been surfing on the net looking for some info and have found the way to 
convert a Lat/Lon position to a UTM position wich gives me a value of meters 
form the ecuator for the latitude and a value of meters form the central 
meridian for the longitude.

But now, How can I do the projection to the screen?

Any ideas / help are wellcome.