Hi Lorena, if you want to clip an image by using a mask layer, you must create first that mask layer, which must be a polygon layer. You can do so in Layer->New->New Shapefile Layer. Set for the mask layer the same reference system of the image.
If you still have troubles please send to this list a detailed description of the error you get, e.g., a screenshot or the error message. I tried this out in QGIS 1.8.0 and it works. Regards, Germán 2012/8/28 lorena Coelho <[email protected]> > Hola, Muchas Gracias. > Voy a intentar explicarme. Estoy usando Quantum Gis 1.8.0 Lisboa. Para > cortar un raster voy a RASTER/EXTRACCIÓN/CLIPPER. entonces se me abre un > ventana que en el medio dice; Modo de corte y tengo dos opciones > por extensión o por capa de mascara. > > Por extensión puedo cortar el raster sin problema pero..por capa de > mascara no estoy pudiendo. > Lo cual no me esta permitiendo realizar cortes irregulares. > > Espero me puedan ayudar...Gracias > > > 2012/8/28 Germán Carrillo <[email protected]> > >> Or post your question in Spanish here, I know there is some people who >> would understand, and even if they are not able to solve your doubts, they >> would help you rephrasing your question in English. >> >> >> 2012/8/28 Etienne Tourigny <[email protected]> >> >>> Hi I'm sorry but I don't understand your question... you mean that it >>> doesn't work if the raster is a mask? >>> >>> By the way, there is a Spanish list at osgeo, although not specific to >>> qgis >>> >>> http://lists.osgeo.org/pipermail/spanish/ >>> >>> Etienne >>> >>> On Tue, Aug 28, 2012 at 3:39 PM, lorena Coelho >>> <[email protected]> wrote: >>> > Hi, thanks for your quick response. The add gdaltools what I have on. >>> In >>> > fact cut a raster if I can, so I can not cut the raster is a mask. >>> That is >>> > asking that the court limit is determined mask. Thanks. Lorena >>> > >>> > >>> > 2012/8/28 Germán Carrillo <[email protected]> >>> >> >>> >> Believe it or not, names in 'Spanish' are: >>> Ráster->Extraction->Clipper :) >>> >> (Ráster->Extracción->Cortador/Cortar) >>> >> >>> >> >>> >> 2012/8/28 Etienne Tourigny <[email protected]> >>> >>> >>> >>> make sure gdaltools plugins is enabled (plugins->Manage Plugins), >>> then >>> >>> go to Raster->Extraction->clipper. Not sure what the names are in >>> >>> español though. >>> >>> >>> >>> On Tue, Aug 28, 2012 at 12:37 PM, lorena Coelho >>> >>> <[email protected]> wrote: >>> >>> > Hello, >>> >>> > I am a magister student in Uruguay. I'm working with QGIS. I can >>> not >>> >>> > cut a >>> >>> > raster mask, can someone help. What is the complement need? I'm >>> using >>> >>> > Quantum GIS 1.8.0 Lisbon >>> >>> > thanks >>> >>> > >>> >>> > >>> >>> > _______________________________________________ >>> >>> > Qgis-user mailing list >>> >>> > [email protected] >>> >>> > http://lists.osgeo.org/mailman/listinfo/qgis-user >>> >>> > >>> >>> _______________________________________________ >>> >>> Qgis-user mailing list >>> >>> [email protected] >>> >>> http://lists.osgeo.org/mailman/listinfo/qgis-user >>> >> >>> >> >>> >> >>> >> >>> >> -- >>> >> ----------- >>> >> |\__ >>> >> (:>__)( >>> >> |/ >>> >> >>> >> Soluciones Geoinformáticas Libres >>> >> http://geotux.tuxfamily.org/ >>> >> http://twitter.com/GeoTux2 >>> >> >>> > >>> >> >> >> >> -- >> ----------- >> |\__ >> (:>__)( >> |/ >> >> Soluciones Geoinformáticas Libres >> http://geotux.tuxfamily.org/ >> http://twitter.com/GeoTux2 >> >> > -- ----------- |\__ (:>__)( |/ Soluciones Geoinformáticas Libres http://geotux.tuxfamily.org/ http://twitter.com/GeoTux2
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