[pmapper-users] Poor image quality on pmapper
Hello all, In my application a Landsat image appear coarse when viewed in pmapper, for the same when viewed via cgi-bin. Could anyone help me on this? CGI-BIN: http://186.202.165.209/cgi-bin/mapserv?map=/var/www/geofazendasmapas/config/default/geofazendasmapas.mapmode=maplayers=municipios+landsat7 Application: http://mapas.geofazendas.com.br/ Thanks in Advance, -- *Marcello Benigno B. de Barros Filho* Prof. do Curso Superior de Tecnologia em Geoprocessamento - IFPB Mestre em Ciências Geodésicas e Tecnologias da Geoinformação - UFPE Doutorando em Tecnologia Ambiental e Recursos Hídricos - UFPE http://profmarcello.blogspot.com http://about.me/marcello.benigno -- Managing the Performance of Cloud-Based Applications Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. Read the Whitepaper. http://pubads.g.doubleclick.net/gampad/clk?id=121054471iu=/4140/ostg.clktrk ___ pmapper-users mailing list pmapper-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pmapper-users
Re: [pmapper-users] Poor image quality on pmapper
Hi, You have to use the same outputformat than with your CGI: http://svn.pmapper.net/trac/wiki/XmlFileSettings#map (search http://svn.pmapper.net/trac/wiki/XmlFileSettings#map; and altImgFormat). Thomas Le 18/02/2014 12:58, Marcello Benigno a écrit : Hello all, In my application a Landsat image appear coarse when viewed in pmapper, for the same when viewed via cgi-bin. Could anyone help me on this? CGI-BIN: http://186.202.165.209/cgi-bin/mapserv?map=/var/www/geofazendasmapas/config/default/geofazendasmapas.mapmode=maplayers=municipios+landsat7 Application: http://mapas.geofazendas.com.br/ Thanks in Advance, -- Managing the Performance of Cloud-Based Applications Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. Read the Whitepaper. http://pubads.g.doubleclick.net/gampad/clk?id=121054471iu=/4140/ostg.clktrk ___ pmapper-users mailing list pmapper-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pmapper-users
Re: [pmapper-users] Poor image quality on pmapper
Marcello I can only confirm what Thomas wrote. I think the default outputformat definition for PNG in p.mapper is 8-bit PNG, which is unsuitable for data like satellite or aerial images since it has only 256 colors. For imagery data you need to use either 24-bit PNG or JPEG. The first has the advantage of better quality for overlaid vector data, the second the much smaller file size that is transfered to the users. Therefore the altImgFormat exists as alternative format in case a certain layer is activated. So you could use e.g. PNG-8 for vector only data, and PNG-24 or JPEG when the Landsat layer is activated. See also a coarse description of output format and layers here http://svn.pmapper.net/trac/wiki/FaqTips#Optimizationimageoutputformat: I would guess the default PNG format for Mapserver (if not defined differently via the map file) is PNG-24, and thus you get a good quality image from Mapserver CGI. Armin On 02/18/2014 02:09 PM, Thomas RAFFIN wrote: Hi, You have to use the same outputformat than with your CGI: http://svn.pmapper.net/trac/wiki/XmlFileSettings#map (search http://svn.pmapper.net/trac/wiki/XmlFileSettings#map; and altImgFormat). Thomas Le 18/02/2014 12:58, Marcello Benigno a écrit : Hello all, In my application a Landsat image appear coarse when viewed in pmapper, for the same when viewed via cgi-bin. Could anyone help me on this? CGI-BIN: http://186.202.165.209/cgi-bin/mapserv?map=/var/www/geofazendasmapas/config/default/geofazendasmapas.mapmode=maplayers=municipios+landsat7 Application: http://mapas.geofazendas.com.br/ Thanks in Advance, -- Managing the Performance of Cloud-Based Applications Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. Read the Whitepaper. http://pubads.g.doubleclick.net/gampad/clk?id=121054471iu=/4140/ostg.clktrk ___ pmapper-users mailing list pmapper-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pmapper-users -- Managing the Performance of Cloud-Based Applications Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. Read the Whitepaper. http://pubads.g.doubleclick.net/gampad/clk?id=121054471iu=/4140/ostg.clktrk ___ pmapper-users mailing list pmapper-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pmapper-users
Re: [pmapper-users] Poor image quality on pmapper
Thanks Thomas and Armin, I'll test. Best 2014-02-18 15:50 GMT-03:00 Armin Burger armin.bur...@gmx.net: Marcello I can only confirm what Thomas wrote. I think the default outputformat definition for PNG in p.mapper is 8-bit PNG, which is unsuitable for data like satellite or aerial images since it has only 256 colors. For imagery data you need to use either 24-bit PNG or JPEG. The first has the advantage of better quality for overlaid vector data, the second the much smaller file size that is transfered to the users. Therefore the altImgFormat exists as alternative format in case a certain layer is activated. So you could use e.g. PNG-8 for vector only data, and PNG-24 or JPEG when the Landsat layer is activated. See also a coarse description of output format and layers here http://svn.pmapper.net/trac/wiki/FaqTips#Optimizationimageoutputformat: I would guess the default PNG format for Mapserver (if not defined differently via the map file) is PNG-24, and thus you get a good quality image from Mapserver CGI. Armin On 02/18/2014 02:09 PM, Thomas RAFFIN wrote: Hi, You have to use the same outputformat than with your CGI: http://svn.pmapper.net/trac/wiki/XmlFileSettings#map (search http://svn.pmapper.net/trac/wiki/XmlFileSettings#map; and altImgFormat). Thomas Le 18/02/2014 12:58, Marcello Benigno a écrit : Hello all, In my application a Landsat image appear coarse when viewed in pmapper, for the same when viewed via cgi-bin. Could anyone help me on this? CGI-BIN: http://186.202.165.209/cgi-bin/mapserv?map=/var/www/geofazendasmapas/config/default/geofazendasmapas.mapmode=maplayers=municipios+landsat7 Application: http://mapas.geofazendas.com.br/ Thanks in Advance, -- Managing the Performance of Cloud-Based Applications Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. Read the Whitepaper. http://pubads.g.doubleclick.net/gampad/clk?id=121054471iu=/4140/ostg.clktrk ___ pmapper-users mailing list pmapper-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pmapper-users -- Managing the Performance of Cloud-Based Applications Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. Read the Whitepaper. http://pubads.g.doubleclick.net/gampad/clk?id=121054471iu=/4140/ostg.clktrk ___ pmapper-users mailing list pmapper-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pmapper-users -- *Marcello Benigno B. de Barros Filho* Prof. do Curso Superior de Tecnologia em Geoprocessamento - IFPB Mestre em Ciências Geodésicas e Tecnologias da Geoinformação - UFPE Doutorando em Tecnologia Ambiental e Recursos Hídricos - UFPE http://profmarcello.blogspot.com http://about.me/marcello.benigno -- Managing the Performance of Cloud-Based Applications Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. Read the Whitepaper. http://pubads.g.doubleclick.net/gampad/clk?id=121054471iu=/4140/ostg.clktrk ___ pmapper-users mailing list pmapper-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pmapper-users
