That's great to hear. If there is to be a complaint about open source,
it would be that there are many great ways to achieve the same result.
Of course, this is actually a compliment.
You will find the environment that you are most comfortable working in
and develop your own solutions. If you are comfortable with postgis,
you can do all of it there as well. That is not something I have done,
but I know it is possible. You might take a look at this post and
ferret out the slides from the talk that are available online as well.
http://postgis.refractions.net/pipermail/postgis-users/2007-July/016358.html
Cheers,
John
On Mar 6, 2008, at 2:12 AM, Corrado wrote:
Thanks a lot to all of you!
To keep you up to date:
METHOD1
1) v.in.ogr
dsn=/home/ct529/Documents/Projects/UKBryophytes/Datasets/BRYOPHYTES/
BRYOPHYTES/SSSI_vectors/ENGLAND.shp
output=England_SSSI layer=ENGLAND min_area=0.0001 snap=-1
location=England_from_shapefile
2) v.clean input=England_SSSI output=England_SSSI_clean
error=England_SSSI_error tool=bpol
3) v.in.ascii
input=/home/ct529/Documents/Projects/UKBryophytes/Datasets/
species_sites_100m.csv
output=species_100m format=point fs=, skip=0 x=4 y=5 z=0 cat=0
4) in postgresql: alter table species_100m add colum sssi_name
varchar(120);
5) v.distance from=species_100m to=England_SSSI dmax=0 upload=to_attr
to_column=sssi_name col=sssi_name
6) in postgresql: select species_name,sssi_name,count(species_id) from
species_100m where sssi_name is not null group by
species_name,sssi_name
order by species_name;
What do you think? I may now run it on dmax=100 and dmax=500.
METHOD2
Today I am going to try Roger's method, combining GRASS and R ,so
that I can
compare.
METHOD3
I would like to develop a comparative method using only grass, and
reading the
shape file directly (without going through spgrass6) using readOGR
and the
rgdal library. Any clue?
I think when I wrote back to the project leader that the problem was
solved,
she as rather impressed by GRASS and by the GRASS community.
Best Regards
--
Corrado Topi
Global Climate Change and Biodiversity
Area 18,Department of Biology
University of York, York, YO10 5YW, UK
Phone: + 44 (0) 1904 328645, E-mail: [EMAIL PROTECTED]
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