[GRASSLIST:4659] Re: vector database stuff and gshhs

[Roger Bivand]

On Thu, 28 Oct 2004, Radim Blazek wrote:

> On Wednesday 27 October 2004 03:37, Ian MacMillan wrote:
> > Hi all, so I have changed tactics and tried to import the gshhs data
> > into 5.7 a different way (since 24 hours of v.convert only put me at 6%
> > finished for a ~180 MB file).  I first tried to export it from 5.3 as
> > an ascii file.  I could import the file into 5.7 with v.in.ascii (and
> > display it), however I don't understand how to get the attributes from
> > the old dig_cats file to connect with the imported file.  I know this
> > is all part of the new database management of vectors in 5.7, but after
> > reading everything I could on the help pages, I think I am more
> > confused.  I don't really know anything about dbf files, ODBC, SQL, or
> > other database formats.  Do I need to learn how to use a database
> > program to use vectors in GRASS?  Isn't there a simple way to convert a
> > dig_cats file into a .dbf file and connect that to my vector file?
> 
> The problem is in grass 5.3 vector format. Categories are stored as 
> points and then attached  to lines, that takes long time for
> large files. Try to avoid 5.3, for example try to find shapefile.
> 

Has anyone tried:

http://www.ngdc.noaa.gov/mgg/shorelines/data/gshhs/gshhs_shp/

Roger

> Radim
> 
> 

-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Breiviksveien 40, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 93 93
e-mail: Roger.Bivand at nhh.no