[GRASS-user] classification of quickbird data

[Daniel Victoria]

Hi Christian,

Well, I don't think you can do anything about the clouds. You will
just have to live with that, or work with radar images, which is an
entirely different beast...

As for the classification, if you want to remove speckle (small huts
for instance), maybe a median filter could help.

On the rice paddies, if they are very different in your image, I'd
create separate classes for each rice paddy type (mature, fallow, etc)
and regroup them latter.

Good luck
Daniel

On Tue, Nov 17, 2009 at 5:37 PM, Christian Röttger
<chris.roettger at uni-muenster.de> wrote:
> hello,
>
> i am working on a land use classification in the Mekong delta, based on
> quickbird data using Grass6.4 RC5 and have 2 questions.
>
> The scene is in parts cloudy, especially my training area. is there an
> option to do some correction to get rid of the clouds?
>
> i already did a classification with 8 classes (about 90 sample) but i'm
> not really satisfied with the result because its so inhomogeneous with
> many small fractions. Is there some literature or experience how to
> classify rural areas with small huts, rice paddys (mature, fallow, under
> water) and mixed orchards?
>
>
> thanks
> christian
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