Re: [gdal-dev] gtiff with internal mask

2013-07-22 Thread Duarte Carreira
p 4: Mosaic_rgba_qgis.vrt Duarte -Mensagem original- De: Duarte Carreira Enviada: quinta-feira, 18 de Julho de 2013 13:01 Para: 'Even Rouault' Cc: 'gdal-dev@lists.osgeo.org' Assunto: RE: [gdal-dev] gtiff with internal mask So... now I 've got issues building the ov

Re: [gdal-dev] gtiff with internal mask

2013-07-19 Thread Duarte Carreira
: Duarte Carreira Enviada: quinta-feira, 18 de Julho de 2013 13:01 Para: 'Even Rouault' Cc: 'gdal-dev@lists.osgeo.org' Assunto: RE: [gdal-dev] gtiff with internal mask So... now I 've got issues building the overviews. Gdaladdo loses the transparency so I get to see black a

Re: [gdal-dev] gtiff with internal mask

2013-07-19 Thread Duarte Carreira
Please ignore previous email... should be a note to self... -Mensagem original- De: Duarte Carreira Enviada: sexta-feira, 19 de Julho de 2013 12:27 Para: 'Even Rouault' Cc: 'gdal-dev@lists.osgeo.org' Assunto: RE: [gdal-dev] gtiff with internal mask Ok, para co

Re: [gdal-dev] gtiff with internal mask

2013-07-18 Thread Duarte Carreira
viada: quarta-feira, 17 de Julho de 2013 19:41 Para: 'Even Rouault' Cc: gdal-dev@lists.osgeo.org Assunto: RE: [gdal-dev] gtiff with internal mask Well, you're right... I messed up recreating the footsteps... So, cleaning up: 1) create a rgba vrt using gdalwarp to cut the original mos

Re: [gdal-dev] gtiff with internal mask

2013-07-17 Thread Duarte Carreira
arreira Cc: gdal-dev@lists.osgeo.org Assunto: Re: [gdal-dev] gtiff with internal mask Le mercredi 17 juillet 2013 14:23:29, Duarte Carreira a écrit : > Hi Even. > > Thanks so much for your tip! It works. I did have to specify I did not > want an alpha band when cutting with the shapefile: >

Re: [gdal-dev] gtiff with internal mask

2013-07-17 Thread Even Rouault
pha band. > > Thanks again! > Duarte > > -Mensagem original- > De: Even Rouault [mailto:even.roua...@mines-paris.org] > Enviada: terça-feira, 16 de Julho de 2013 18:58 > Para: gdal-dev@lists.osgeo.org > Cc: Duarte Carreira > Assunto: Re: [gdal-dev] gtiff with i

Re: [gdal-dev] gtiff with internal mask

2013-07-17 Thread Duarte Carreira
geo.org Cc: Duarte Carreira Assunto: Re: [gdal-dev] gtiff with internal mask Le mardi 16 juillet 2013 12:29:37, Duarte Carreira a écrit : > I'm trying to create gtiffs with transparent areas where there are > voids between my original images. > > I have successfully done it by u

Re: [gdal-dev] gtiff with internal mask

2013-07-16 Thread Even Rouault
Le mardi 16 juillet 2013 12:29:37, Duarte Carreira a écrit : > I'm trying to create gtiffs with transparent areas where there are voids > between my original images. > > I have successfully done it by using an alpha band but this process created > 3x larger images. I think partly because of an add

[gdal-dev] gtiff with internal mask

2013-07-16 Thread Duarte Carreira
I'm trying to create gtiffs with transparent areas where there are voids between my original images. I have successfully done it by using an alpha band but this process created 3x larger images. I think partly because of an additional 4th band and partly because I cannot use ycbcr to compress w