Hi,
I have a series of classified rasters from different landsat images
(various dates). I want to moasic/stitch them to a one raster. The
problem is there are subtle differences in the classified output. Any
advise in mosaicing them?
--
cheers,
maning
------------------------------------------------------
"Freedom is still the most radical idea of all" -N.Branden
wiki: http://esambale.wikispaces.com/
blog: http://epsg4253.wordpress.com/
------------------------------------------------------
I trying to mosaic my classified images, I have been experimenting
with David Finlayson's r.smoothpatch and r.eucdist. This looks like
the tools I need. However, the output map produces FCELL rasters. My
classified image is an integer where integer values represent a
landcover category.
Is there a way to use this for integer-nominal data?
On Wed, Jan 7, 2009 at 11:04 AM, maning sambale
<emmanuel.sambale@gmail.com> wrote:
Hi,
I have a series of classified rasters from different landsat images
(various dates). I want to moasic/stitch them to a one raster. The
problem is there are subtle differences in the classified output. Any
advise in mosaicing them?
--
cheers,
maning
------------------------------------------------------
"Freedom is still the most radical idea of all" -N.Branden
wiki: http://esambale.wikispaces.com/
blog: http://epsg4253.wordpress.com/
------------------------------------------------------
--
cheers,
maning
------------------------------------------------------
"Freedom is still the most radical idea of all" -N.Branden
wiki: http://esambale.wikispaces.com/
blog: http://epsg4253.wordpress.com/
------------------------------------------------------
Hi,
I am reposting this hoping for some answers. Manually reclassifying
conflicting values seem to be a pain. Any advice?
---------- Forwarded message ----------
From: maning sambale <emmanuel.sambale@gmail.com>
Date: Wed, Jan 7, 2009 at 11:04 AM
Subject: mosaicing classified images
To: grass mailing list <grass-user@lists.osgeo.org>
Hi,
I have a series of classified rasters from different landsat images
(various dates). I want to moasic/stitch them to a one raster. The
problem is there are subtle differences in the classified output. Any
advise in mosaicing them?
--
cheers,
maning
------------------------------------------------------
"Freedom is still the most radical idea of all" -N.Branden
wiki: http://esambale.wikispaces.com/
blog: http://epsg4253.wordpress.com/
------------------------------------------------------
--
cheers,
maning
------------------------------------------------------
"Freedom is still the most radical idea of all" -N.Branden
wiki: http://esambale.wikispaces.com/
blog: http://epsg4253.wordpress.com/
------------------------------------------------------
On Wed, Jan 7, 2009 at 4:04 AM, maning sambale
<emmanuel.sambale@gmail.com> wrote:
Hi,
I have a series of classified rasters from different landsat images
(various dates). I want to moasic/stitch them to a one raster. The
problem is there are subtle differences in the classified output. Any
advise in mosaicing them?
(I am afraid that it is easier to first mosaic (e.g., with OSSIM), then
do the classification...)
You could vectorize the raster areas and then try some SQL
magic to match close polygons. Also v.clean to remove tiny
areas from the map if needed.
2 schools of thought appear:
1. Mosaic image then classify
2. Classify individual images then mosaic
I am following the great grass developer Michael Shapiro's (is he the
grass developer?) advice on option 2.
On Wed, Jan 21, 2009 at 7:16 PM, Markus Neteler <neteler@osgeo.org> wrote:
On Wed, Jan 7, 2009 at 4:04 AM, maning sambale
<emmanuel.sambale@gmail.com> wrote:
Hi,
I have a series of classified rasters from different landsat images
(various dates). I want to moasic/stitch them to a one raster. The
problem is there are subtle differences in the classified output. Any
advise in mosaicing them?
(I am afraid that it is easier to first mosaic (e.g., with OSSIM), then
do the classification...)
You could vectorize the raster areas and then try some SQL
magic to match close polygons. Also v.clean to remove tiny
areas from the map if needed.
Markus
--
cheers,
maning
------------------------------------------------------
"Freedom is still the most radical idea of all" -N.Branden
wiki: http://esambale.wikispaces.com/
blog: http://epsg4253.wordpress.com/
------------------------------------------------------