[GRASS-user] How to import as vector?

[Bulent Arikan]

Thank you for the suggestions! Yes, it will be a lot of work and time
consuming to digitize it. I was also suggested to use Inkscape to autotrace
it and save it in (svg). However, saving it as (svg) does not help because
'v.in.ogr' does not seem to import that format. I even saved it as (dxf)
but the import failed –nothing showed up after importing it as vector
layer– with 'v.in.ogr' and 'v'in.dxf'.

Is there a separate module for importing (svg) files or should I use a
different file extension?

Thank you,

Bulent

On Thu, Jan 12, 2012 at 1:49 AM, Markus Neteler <neteler at osgeo.org> wrote:

> On Wed, Jan 11, 2012 at 1:25 PM, Bulent Arikan <bulent.arikan at gmail.com>
> wrote:
> > Dear List,
> >
> > I found a plan / architectural drawing online. I am not sure about the
> > resolution but JPG version is 25 Mb and TIFF version is 410 Kb. I want to
> > import the drawing as vector into 'xy location' and then rectify it. I
> > already did rectify the image as "raster" but I will need a vector layer.
> > Looking at 'v.in.ogr' I am not sure how to bring images of such formats
> into
> > GRASS as vector. Raster to vector transformation does not work.
>
> Since it is a raster map you have (at least) two options:
> - use it as background for a digitizer (likely a lot of work)
> - try image processing to get out raster lines, then r.thin and
>  subsequently r.to.vect with lines. This much depends on the
>  JPG quality.
> - (there are some autotracer tools, too)
>
> Markus
>



-- 
BÜLENT ARIKAN, PhD
Senior Research Fellow
Research Center for Anatolian Civilizations
Koç University
İstiklal Caddesi No: 181 Merkez Han
Beyoğlu - ISTANBUL
TURKEY
34433
(+ 90) 212-393-6036
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