[GRASS-user] Attribute transfer from one table to another based on position of vector items

[Daniel Lee]

Wow, cool tip! Thanks! :)

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B.Sc. Daniel Lee
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2012/6/8 Markus Metz <markus.metz.giswork at googlemail.com>

> On Fri, Jun 8, 2012 at 2:25 PM, Jaromír Kamler <kamler at centrum.cz> wrote:
> > Hi,
> >
> > I have two vectors imported from SHP. One contains lines (areas), which
> > represents sites and in other are texts with cost of sites. I imported
> them
> > to GRASS. Texts with costs of ground are now points with cost in
> attribute
> > table and I turned circuid lines to the areas with centroids.I need copy
> > costs from attribute table of costs to the attribute table of sites
> vector.
> > I have no key for connection of this tables. Only one "key" is their
> > position, because points with cost attribute are above corresponding
> areas.
> > One point with cost of ground is above one area. How get cost of
> > corresponding point to the corresponding attribute of ground? I do not
> see
> > any simple possibility.
>
> If both vectors are available as shapefiles, you could put the two
> shapefiles into one directory (with no other shapefiles in it) and
> then try something like
>
> v.in.ogr dsn=/path/to/folder/with/shapefiles/ type=boundary,centroid
>
> With type=boundary,centroid, lines will be converted to boundaries and
> points to centroids. Attributes attached to sites (points) will now be
> attached to areas, nothing else to do.
>
> Markus M
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