[GRASS-user] Semi-automatic classification of old thematic map

[Markus Neteler]

Hi,

On Tue, Nov 6, 2018 at 11:24 AM Giuseppe Cillis <giucillis at gmail.com> wrote:
>
> Dear all,
> I would like to classify in a semi-automatic way, an old scanned thematic map of land use.
> The different classes of land use are represented by polygons of different colors.
> Which module can I use to identify the different land use classes?

In this case it might make sense to apply OBIA techniques:

https://grasswiki.osgeo.org/wiki/Image_classification#Object-based_classification_and_image_segmentation

After segmentation, classification methods can be applied.
Of course there may be other approaches as well.

Best
Markus