Dear Malik,

 

I'm a newcomer to GRASS and R myself, having recently moved over from
ArcGIS/Erdas, so I'm probably not the best person to assist you.  My
suggestion was merely that it seems sensible to use a GIS software to do a
GIS task, particularly one such as classification which often requires a
large degree of interaction with the data to define training samples and
improve the classification iteratively.

 

I'm interested to hear opinions from others - is GRASS the best route for
land-cover classification, or are stand-alone packages in R a viable
alternative?  Any advice would be much appreciated - thank you.

 

Regarding the use of GRASS and R, my understanding is that you start R
through the GRASS terminal and then work in the usual R interface.  This
presumably allows R to apply GRASS commands to the GIS layers in the
location & mapset you started GRASS in.  This booting of R through GRASS is
briefly described at the end of the
http://grass.fbk.eu/statsgrass/grass6_r_install.html.  

 

If you need help in installing the xml package (from the list, not from
newbie me!), you would need to provide more information about your setup
(operating system/R version), what method you used to install (download zip
file, install directly through R?), and the precise error message.  However,
I strongly suggest that you use the online help and maillist archives to try
and find your answer before sending a request to the list.

 

I hope that helps - other readers please do feel free to correct any errors
or omissions of mine.

 

Best wishes,

 

Lucy

 

From: Malik Shahzad [mailto:geomalik@live.com] 
Sent: 17 November 2010 08:24
To: conservationgis@btinternet.com
Subject: RE: [R-sig-Geo] Package for Classification????

 

Dear Dr. Lucy!

 

Thanks for your kind help. As per your instructions I tried to install
GRASS. Then I tried to load package "spgrass6" in R and found error:

Need "XML" Package and I am unable to install  XML package for windows...
from

http://cran.r-project.org/web/packages/XML <http://> 

 

Second, I will work in R-Interface after loading GRASS package or I have to
work in GRASS Interface???

 

Please help me in this regards, As I am new in both packages... & once again
thanks...

with Best Regards,
 
Malik Shahzad
Visiting Researcher
National Institute of Informatics (NII)
Tokyo, Japan
 
Doctoral Student
Asian Institute of Technology (AIT)
Bangkok, Thailand
+66-8-7676-5616




  _____  

From: conservationgis@btinternet.com
To: geomalik@live.com
Subject: RE: [R-sig-Geo] Package for Classification????
Date: Tue, 16 Nov 2010 16:21:36 +0000

Dear Malik,

 

Using the GRASS-R interface would seem to be a sensible route.  See:

 

http://cran.r-project.org/web/packages/spgrass6/index.html

http://grass.fbk.eu/statsgrass/grass6_r_install.html

 

Best wishes,

 

Lucy

 

 

Dr Lucy Tallents

Assistant Coordinator, PG Dip in International Wildlife Conservation
Practice

 

Wildlife Conservation Research Unit (WildCRU)

Zoology, University of Oxford

The Recanati-Kaplan Centre

Tubney House, Abingdon Road

Tubney, Abingdon OX13 5QL, UK

T +44 (0) 1865 611125

F +44 (0) 1865 611101

M +44 (0) 7763 378147

 <http://www.wildcru.org/diploma> www.wildcru.org/diploma

 

 

 

From: r-sig-geo-bounces@stat.math.ethz.ch
[mailto:r-sig-geo-bounces@stat.math.ethz.ch] On Behalf Of Malik Shahzad
Sent: 16 November 2010 16:16
To: R Help
Subject: [R-sig-Geo] Package for Classification????

 

 

Dear I want to know a good package for Raster data classification (
Supervised & Unsupervised).Thanks in Advance...

with Best Regards,



Malik Shahzad

Visiting Researcher

National Institute of Informatics (NII)

Tokyo, Japan



Doctoral Student

Asian Institute of Technology (AIT)

Bangkok, Thailand

+66-8-7676-5616


                                         
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