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Posted by Paul Cooper on May 2, 2006, 4:12 am
Please log in for more thread options On Mon, 01 May 2006 10:38:43 +0100, Jonathan Buzzard
>On Wed, 26 Apr 2006 11:26:47 +0000, Paul Cooper wrote:
>
>> On 26 Apr 2006 04:15:34 -0700, pinoysurveyor@gmail.com wrote:
>>
>>>hi everyone,
>>>
>>>i am trying to create a very large map image in either pdf/tiff/jpg
>>>format. the problem is most printer drivers are limited to the A0
>>>Oversize sheets. I need everything to be in 1 sheet only.are there any
>>>printer drivers that would allow "unlimited" paper size (10mx10m)?
>>>
>>>thanks
>>
>>
>> I think you need to think very hard about what you wish to acheive!
>> The only practical format of the three you mention is PDF, which can
>> use vectors to represent vector data, thus keeping the size down. PDF
>> can be created from Postscript (drivers for which have a "custom" page
>> size setting) using either the freeware GhostScript and GhostView or
>> using Adobe Acrobat - the full version, not the reader.
>
>Eh, the entire 1:50000 scale OS data for the whole of GB comes to about
>5GB. Are you saying that it is impossible to create 5GB image files?
>However something that would an area 10m by 10m would be a fraction of
>this. Nearly 10 years ago I was routinely creating 1GB+ composite
>satellite images.
>
>JAB.
That isn't the point, and is the reason I suggested PDF. The point is
that a TIFF or JPEG image's size is purely constrained by the size and
resolution. Without compression, the image would be approximately 56
Gbytes (at 300 pixels per inch and CMYK). Lossless compression might
bring that down significantly, but the uncompressed image would still
have to be handled for printing, overwhelming the memory of most
printing devices. PDF, of course, handles vectors as vectors and in
this case is much more efficient.
Paul
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