[GRASS-user] Creating a specific vectorial from classification map

GRASS GRASS user
1

Hello

I have created a classification map and I would like to convert it to a vectorial file. But instead of just converting I would really like to define scale (1:XXXX) of the output map and Minimum mapping area for each polygon. Is it possible?

Thanks

Usually before I post a message a try to find a similar question but I didn’t find anything.

Bye
Nikos

2

Hello

I have created a classification map (in raster) and I would like to convert it to a vectorial file. But instead of just converting I would really like to define scale (1:XXXX) of the output map and Minimum mapping area for each polygon. Is it possible?

Thanks

Usually before I post a message a try to find a similar question but I didn’t find anything.

Bye
Nikos

3

On Monday 07 December 2009, Nikos Dumakis wrote:

Hello

I have created a classification map (in raster) and I would like to convert
it to a vectorial file. But instead of just converting I would really like
to define scale (1:XXXX) of the output map and Minimum mapping area for
each polygon. Is it possible?

Thanks

Usually before I post a message a try to find a similar question but I
didn't find anything.

Bye
Nikos

Hi,

Would r.reclass.area help?

Cheers,
Dylan

--
Dylan Beaudette
Soil Resource Laboratory
http://casoilresource.lawr.ucdavis.edu/
University of California at Davis
530.754.7341

4

Hello Dylan

Sorry for my delay on replying to your message.

Ok I reading r.reclass.area manual and I’m not sure what is it doing.
Because If I define a limit to "lesser value option that sets the <= area size limit " all the small blocks are not eliminated. Each block now has a specific color but and it’s related with its size but when I use “Query raster” the value is the original classification value.
And by the way it creates a clump. What is a clump?

Thank you all

Best regards
Niko

On Mon, Dec 7, 2009 at 5:30 PM, Dylan Beaudette <debeaudette@ucdavis.edu> wrote:

On Monday 07 December 2009, Nikos Dumakis wrote:

Hello

I have created a classification map (in raster) and I would like to convert
it to a vectorial file. But instead of just converting I would really like
to define scale (1:XXXX) of the output map and Minimum mapping area for
each polygon. Is it possible?

Thanks

Usually before I post a message a try to find a similar question but I
didn’t find anything.

Bye
Nikos

Hi,

Would r.reclass.area help?

Cheers,
Dylan

–
Dylan Beaudette
Soil Resource Laboratory
http://casoilresource.lawr.ucdavis.edu/
University of California at Davis
530.754.7341