[GRASS5] v.to.db 2 new features compactness and perimeter

[Markus Neteler]

Hi,

I have uploaded Wolfs additions to v.to.db into 6.1-CVS.
Thanks, Wolf!

Markus


On Thu, Nov 03, 2005 at 06:58:35PM +0200, Wolf Bergenheim wrote:
> I messed up the previous patch...
> 
> Here is a new one!
> 
> --Wolf
> 
> On 03/11/05 18:27, Wolf Bergenheim wrote:
> > Hi!
> > 
> > I fixed my fix for supporting compactness in v.to.db. I also added
> > support for perimeter option which calculates the perimeter of an area.
> > Compactness is calculated by doing:
> > 
> > compactness = perimeter / 2 * sqrt(M_PI * area)
> > 
> > which gives a circle the value 1 and all other shapes have a larger value.
> > 
> > Please have a look at my patch, and LMK if you think something is
> > strange or out right wrong. I have tested these new options a bit, but I
> > haven't really tested them on weird / broken material. I have also not
> > tried to calculate the perimeter or compactness of lines. (;
> > 
> > --Wolf
> > 
> 
> -- 
> 
> <:3 )---- Wolf Bergenheim ----( 8:>
> 



-- 
Markus Neteler     <neteler itc it>       http://mpa.itc.it
ITC-irst -  Centro per la Ricerca Scientifica e Tecnologica
MPBA - Predictive Models for Biol. & Environ. Data Analysis
Via Sommarive, 18        -       38050 Povo (Trento), Italy