creation of polygons from points

GRASS GRASS user
1

Someone posed a question to me about delineating polygons around
points (sites), sort of splitting the distance between points to create
a "polygon of influence" of each site. The sites are unequally distributed.

Would this best be done by converting the sites to a raster and using
r.neighbors or an r.mapcalc statement to "grow" the site cells?

Advice would be appreciated--- thanks in advance

stewalt@ncrds.er.usgs.gov

I haven't been following this thread closely so someone may have
mentioned this but you can make veronio/theisson/proximal polygons
by using s.surf.idw and setting the number of interpolation points
to 1. You get a raster rather than a vector map but it's quick.

cheers Tom :sunglasses:

Tom Charnock O--O
Dept Civil Engineering (~~~~)
Aston University ( __ )
Birmingham B4 7ET UK /|\ /|\
charnotw@sun.aston.ac.uk

2

Hi all

I'm needing to import TM3, TM4 and TM5 bands into
GRASS but I'm newbie with GRASS/GIS.

My specific interest is to do segmentation (PCA) and Maximum
likelihood classification using two date.

I's possible in GRASS?

Thanks in advance

Miltinho (RIBEIRO, M.C.)
Quantitative Methods Laboratory
Forest Science Department
ESALQ/University of Sao Paulo
Brazil