[Gvsig_english] calculating centre points of polygon and ascribing coordinates

[Simon Cropper (Botanicus Australia Pty Ltd)]

Hi Everyone,

Can someone tell me if gvSIG can be used to establish the centre point 
of a polygon?

... and subsequently place the X and Y coordinates in fields in the 
attribute table of the polygon shapefile?

... or alternatively create a point file representing the centrepoint 
and be able to assign the XY values to that shapefile.

What I regularly do in alternative programs (OpenJUMP, Kosmo, Sextante) 
is create a point file showing the centrepoint of a set of polygons 
(usually representing the sites I have surveyed) and then using ArcView 
assign the XY coordinate of the points to the northing+easting fields. 
Reproject into Lat-Long and repeat. These coordinates are used to report 
the sites locations to government agencies.

How would you do this in gvSIG?

Can you use Jpython to do this?
-- 

Cheers Simon

Simon Cropper
Botanicus Australia Pty Ltd
PO Box 160, Sunshine, Victoria 3020.
P: 9311 5822. M: 041 830 3437.
mailto: scropper at botanicusaustralia.com.au 
<mailto:scropper at botanicusaustralia.com.au>
web: www.botanicusaustralia.com.au <http://www.botanicusaustralia.com.au>