[GRASS-user] Supervised Classification Tool - g.gui.iclass

GRASS GRASS user
1

Hi Users,

I want to know if there is any good sources of information on the above wxlClass. I want to know roughly how large the training areas should be to prevent the module from taking several hours to process a signature. Also in the Training Area Display must i use a composite RGB image to digitise a training area from or will a single channel be okay?

Many thanks,

···

Paul J. Shapley MSc CGeog (GIS) FRGS

2

Am 1. Juni 2018 11:26:22 MESZ schrieb Paul Shapley <p.shapley@gmail.com>:

Hi Users,

I want to know if there is any good sources of information on the above
wxlClass. I want to know roughly how large the training areas should be
to
prevent the module from taking several hours to process a signature.

I haven't had this experience. Check your region settings. Maybe that explains long run times.

Also
in the Training Area Display must i use a composite RGB image to
digitise a
training area from or will a single channel be okay?

You can use whatever suits you. Often it is advisable to display different bands and composites and switch between them according to need.

Moritz

Many thanks,

3

Hi Users,

I want to know if there is any good sources of information on the above wxlClass. I want to know roughly how large the training areas should be to prevent the module from taking several hours to process a signature. Also in the Training Area Display must i use a composite RGB image to digitise a training area from or will a single channel be okay?

Many thanks,

–

Paul J. Shapley MSc CGeog (GIS) FRGS

–

Paul J. Shapley MSc CGeog (GIS) FRGS