[GRASS-user] Pos-classification processing

GRASS GRASS user
1

Hello All
This is my first email to GRASS mailing list.

at my college we are using ArcGIS Spatial Analyst tool to perform some pos-classification processing. Our objective is to apply a semantic generalization operation by:

  • eliminating clusters with a size bellow defined Minimum Mapping area;
  • Erosion&Shrink/Expand in order to create buffers;
  • apply filters in order to implement a boundary smooth.

All this functions are available at ArcGIS but I want to use them in GRASS, since it’s a Open Source tool, and demonstrate the best assets of this software.

Could anyone point me a few functions/modules that can perform this tasks?

Gracias

Pedro

2

Hi,

On Wed, Jan 6, 2010 at 5:32 PM, Pedro Roma <pedroroma1982@gmail.com> wrote:

Hello All
This is my first email to GRASS mailing list.

welcome :slight_smile:

at my college we are using ArcGIS Spatial Analyst tool to perform some
pos-classification processing. Our objective is to apply a semantic
generalization operation by:
- eliminating clusters with a size bellow defined Minimum Mapping area;

v.clean, tool=rmarea thresh=xxx
or
r.neighbors, method=mode
or
r.reclass.area

- Erosion&Shrink/Expand in order to create buffers;

r.grow

- apply filters in order to implement a boundary smooth.

see for example
v.generalize

The manual is here:
http://grass.osgeo.org/grass64/manuals/html64_user

All this functions are available at ArcGIS but I want to use them in GRASS,
since it's a Open Source tool, and demonstrate the best assets of this
software.
Could anyone point me a few functions/modules that can perform this tasks?

See above.
Please consider to later add your results to
http://grass.osgeo.org/wiki/Tips_for_Arc_users

Markus