[GRASSLIST:3421] Re: Fw: Images resolution and rectification.

[giorgio]

Hi Markus
All Level 1B and higher-level data products of aster data are projected in
UTM you can get them ftom http://edcimswww.cr.usgs.gov/pub/imswelcome/. I'm
not sure but, maybe, aster 1A level too.
Something about the lost of resolution with the rotation (rectification) of
the image??
Thanks a lot in advance!!
Giorgio.
----- Original Message -----
From: "Markus Neteler" <neteler at itc.it>
To: "giorgio" <giorgio19291 at inwind.it>
Sent: Wednesday, April 03, 2002 5:35 PM
Subject: Re: [GRASSLIST:3399] Fw: Images resolution and rectification.


> Hi giorgio,
>
> On Sat, Mar 30, 2002 at 10:51:48AM +0100, giorgio wrote:
> >
> > ----- Original Message -----
> > From: giorgio
> > To: grass5 at grass.itc.it
> > Sent: Saturday, March 30, 2002 10:45 AM
> > Subject: Images resolution and rectification.
> >
> >
> > I have an aster image.
> > Reading information on this kind of images: these are already projected
in utm coordinates with 15m pixel resolution but are roted in the space for
trayectory of satellite.
>
> just curious, where did you get them in UTM?
>
> Markus
>
> > So I have imported it in xy grass envirnment and rectified it with the
four utm coordinates readed from data associated with images.
> > The results is a good registration of image but a lost of resolution
15-->20m pixel.
> > There is a method to mantain the resolution of the image??
> > Many thanks Giorgio.