I am having one of our surveys printed professionally as an A1 poster and a couple of issues have arisen that it is worth users being aware of. One is that the printer's software had a problem faithfully reproduced some fill areas, mostly stal flow. They solved it but it is worth keeping an eye out for this as some small areas might easily be missed. The second is the lack of control over colour - not the usual problem of being able to control which colours it uses if asked to colour the whole survey - which I believe is being looked at - but the seeming fact that the output will be coloured RGB when printers require CMYK. I know that Acrobat Distiller can deal with this and generate appropriate files, but I cannot see a way of doing this in Therion. Graham
Graham, the best way to print maps from Therion's PDFs is to render them to pictures. I do it in Photoshop. It could be really huge file. Don't render to too high resolution. For A1 150-180 dpi in final size should be enough. RGB/CMYK problem should be solved if one sets the color space of PDF as sRGB in printers software. Martin Odesláno z iPhonu 21. 3. 2013 v 8:18, Graham Mullan <graham.mullan@coly.org.uk>:
I am having one of our surveys printed professionally as an A1 poster and a couple of issues have arisen that it is worth users being aware of. One is that the printer's software had a problem faithfully reproduced some fill areas, mostly stal flow. They solved it but it is worth keeping an eye out for this as some small areas might easily be missed.
The second is the lack of control over colour - not the usual problem of being able to control which colours it uses if asked to colour the whole survey - which I believe is being looked at - but the seeming fact that the output will be coloured RGB when printers require CMYK. I know that Acrobat Distiller can deal with this and generate appropriate files, but I cannot see a way of doing this in Therion.
Graham _______________________________________________ Therion mailing list Therion@speleo.sk http://mailman.speleo.sk/mailman/listinfo/therion
I have (in my small experience) not yet found a large format printer/driver that can reproduce therion generated fill areas reliably. Almost always get recessive hazey dotty rectangular areas, and the transparency settings are ignored. I have tried converting to jpg and png but usually going up to 150 dpi crashes or locks things up, and when 150 dpi does work, while the file looks OK on screen, the quality of the printed output is so bad as to be unusable, so I go back to using the original pdf. I'm working with approx 5MB pdf files that print about 600-1000mm x 2000mm, and sometimes up to 10MB. Regards Bruce -----Original Message----- From: therion-bounces@speleo.sk [mailto:therion-bounces@speleo.sk] On Behalf Of Martin Sluka Sent: Thursday, 21 March 2013 8:58 p.m. To: List for Therion users Subject: Re: [Therion] PDF generation Graham, the best way to print maps from Therion's PDFs is to render them to pictures. I do it in Photoshop. It could be really huge file. Don't render to too high resolution. For A1 150-180 dpi in final size should be enough. RGB/CMYK problem should be solved if one sets the color space of PDF as sRGB in printers software. Martin Odesláno z iPhonu 21. 3. 2013 v 8:18, Graham Mullan <graham.mullan@coly.org.uk>:
I am having one of our surveys printed professionally as an A1 poster and a couple of issues have arisen that it is worth users being aware of. One is that the printer's software had a problem faithfully reproduced some fill areas, mostly stal flow. They solved it but it is worth keeping an eye out for this as some small areas might easily be missed.
The second is the lack of control over colour - not the usual problem of being able to control which colours it uses if asked to colour the whole survey - which I believe is being looked at - but the seeming fact that the output will be coloured RGB when printers require CMYK. I know that Acrobat Distiller can deal with this and generate appropriate files, but I cannot see a way of doing this in Therion.
Graham
Hello Bruce, I was this year at a producer of large format printers on a trade fair. There I got a cave map printed (size approx 1m by 1.5m. He opened the pdf in Photoshop and rasterized it with 360 dpi. That file was printed afterwards. Quality in my opinion is great. He said, that photoshop is best for this job, and this is more reliable than letting the printer do it. For saving pixel files for printing I would recommend to either use photoshop native format or "tif" with lzw-compression. This is a losseless compression. jpeg and png are either lossy and/or limited in pixel size. Best regards Wolfgang Am 21.03.2013 23:35, schrieb Bruce:
I have (in my small experience) not yet found a large format printer/driver that can reproduce therion generated fill areas reliably. Almost always get recessive hazey dotty rectangular areas, and the transparency settings are ignored.
I have tried converting to jpg and png but usually going up to 150 dpi crashes or locks things up, and when 150 dpi does work, while the file looks OK on screen, the quality of the printed output is so bad as to be unusable, so I go back to using the original pdf.
I'm working with approx 5MB pdf files that print about 600-1000mm x 2000mm, and sometimes up to 10MB.
Regards Bruce -----Original Message----- From: therion-bounces@speleo.sk [mailto:therion-bounces@speleo.sk] On Behalf Of Martin Sluka Sent: Thursday, 21 March 2013 8:58 p.m. To: List for Therion users Subject: Re: [Therion] PDF generation
Graham, the best way to print maps from Therion's PDFs is to render them to pictures. I do it in Photoshop. It could be really huge file. Don't render to too high resolution. For A1 150-180 dpi in final size should be enough. RGB/CMYK problem should be solved if one sets the color space of PDF as sRGB in printers software.
Martin
Odesláno z iPhonu
21. 3. 2013 v 8:18, Graham Mullan <graham.mullan@coly.org.uk>:
I am having one of our surveys printed professionally as an A1 poster and a couple of issues have arisen that it is worth users being aware of. One is that the printer's software had a problem faithfully reproduced some fill areas, mostly stal flow. They solved it but it is worth keeping an eye out for this as some small areas might easily be missed. The second is the lack of control over colour - not the usual problem of being able to control which colours it uses if asked to colour the whole survey - which I believe is being looked at - but the seeming fact that the output will be coloured RGB when printers require CMYK. I know that Acrobat Distiller can deal with this and generate appropriate files, but I cannot see a way of doing this in Therion.
Graham
_______________________________________________ Therion mailing list Therion@speleo.sk http://mailman.speleo.sk/mailman/listinfo/therion
Mar 22, 2013 v 8:16 AM, Wolfgang Zillig <wolfgang.zillig@web.de>:
rasterized it with 360 dpi.
Martin 360 dpi is optimal for sharp printing of text and slopy thin lines on Epson printers (they use 360-720-1440-2880 dpi as printing resolution). But 180 dpi is good too, there are differences but visible only side by side from very short distance. For HP/Canon and others printers using 300-600-1200-2400 dpi for printing is 300 dpi the optimal, but 150 good too. The choice of resolution depends on scale between size of map and final size of print. If you should downsize your map to print there is optimal resolution of rasterising not necessary. Martin
yes, it was Epson in my case ;) Am 22.03.2013 08:28, schrieb Martin Sluka:
Mar 22, 2013 v 8:16 AM, Wolfgang Zillig <wolfgang.zillig@web.de <mailto:wolfgang.zillig@web.de>>:
rasterized it with 360 dpi.
Martin
360 dpi is optimal for sharp printing of text and slopy thin lines on Epson printers (they use 360-720-1440-2880 dpi as printing resolution). But 180 dpi is good too, there are differences but visible only side by side from very short distance.
For HP/Canon and others printers using 300-600-1200-2400 dpi for printing is 300 dpi the optimal, but 150 good too.
The choice of resolution depends on scale between size of map and final size of print. If you should downsize your map to print there is optimal resolution of rasterising not necessary.
Martin
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participants (4)
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Bruce -
Graham Mullan -
Martin Sluka -
Wolfgang Zillig