Check this out. I made them for my students, so they are in spanish... hope it helps
Gerardo Jiménez Delgado Instituto de Investigaciones Antropológicas Universidad Nacional Autónoma de México Ciudad Universitaria s/n Coyoacan 04510 Mexico City Mexico 56 22 95 16 > Subject: Re: [Qgis-user] How to Degitize a raster immage > Date: Thu, 3 Nov 2011 18:15:24 +1300 > From: [email protected] > To: [email protected] > CC: [email protected] > > And if you are thinking of manually tracing over a raster image you just > need the tools on the "digitisation" and "advanced digitisation" > toolbars. There is help on these in the user manual. > > > Date: Wed, 2 Nov 2011 16:52:49 -0700 > > From: Mars <[email protected]> > > Subject: Re: [Qgis-user] How to Degitize a raster immage > > To: Mumtaz Lakho <[email protected]> > > Cc: QGIS-Users <[email protected]> > > Message-ID: <[email protected]> > > Content-Type: text/plain; charset="us-ascii" > > > > Besides Geo-Referencing a Raster image, there is also a function > called > > "Feature Extraction". I Believe there is a plugin for extracting > Vector > > Features from a DEM and possibly other functions to extract features > from other > > types of Rasters. Perhaps if Geo-referencing is not your primary goal > you can > > research feature extraction to give you some background. > > > > Sent from my iPhone > > > > On 2011-11-02, at 12:57 PM, Mumtaz Lakho <[email protected]> > wrote: > > > > > Dear QGIS Repr. > > > Would u please guide me the process of Digitizationof raster layer > under > > QGIS 1.7.1- wroclaw > > > thanks > > > (Mumtaz) > > > a QGIS User > _______________________________________________ > Qgis-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-user
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