big size files!!

AA
Posted By
Andrew_awda
Jan 8, 2004
Views
374
Replies
8
Status
Closed
can anyone help me I keep on creating files that are 1gb big with a simple 400×100 size using RGB colouring and a plain white background. Has anyone ever experinanced this before? would someone please be able to help me? Hope I’ve posted in the right place.
regards,
Andrew
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MM
Mac_McDougald
Jan 8, 2004
That 400×100 in pixels, or inches?

Mac
AA
Andrew_awda
Jan 9, 2004
thats just cm
RK
Rob_Keijzer
Jan 9, 2004
That’s quite large. Unless you’re creating 1:1 world maps. Please create the following:
100×100 pixels RGB 72 DPI. Then please tell us what size that is. Rob
MM
Mac_McDougald
Jan 9, 2004
thats just cm

There’s your answer.
400×100 cm at 190ppi (the largest can create under 30,000 pixel width) is about 640MB. Add a layer or three and you’d be right up around the 1GB size you report.
There’s a reason you need such a large physical sized image?

Mac
AA
Andrew_awda
Jan 9, 2004
ok done that what scale should I use (mm, cm, inch).
And should I use pixel/inch or pixel/cm
regards,
Andrew
RW
Rene_Walling
Jan 9, 2004
ok done that what scale should I use (mm, cm, inch).

The one you are most comfortable in or that makes the most sense

And should I use pixel/inch or pixel/cm

The same.

Not knowing what your project is and how it will be printed, there is no single correct answer, but a good rule of thumb for print work (unless you are doing large format) is to work at 300 pixels per inch (ppi) or 120 pixels per cm.
MM
Mac_McDougald
Jan 9, 2004
ok done that what scale should I use (mm, cm, inch).
And should I use pixel/inch or pixel/cm
regards,
Andrew

Entirely up to you.
You need to design the output size you actually need for a project, of course.
We Mericuns tend to think in inches, pixels/inch FWIW.
But it doesn’t matter as far as an image is concerned; that is, a 400x100cm image at 74.8 pixels/cm is 157.4 x 39.3 inches at 190 pixels/inch.
Both images are the same physical output size and both contain the same number of total pixels 29921 x 7480.
(Photoshop has a 30,000 pixel limit on any dimension, unless you are using the alternate file format in the new CS version).

Mac
AA
Andrew_awda
Jan 9, 2004
alright thanks for that now the file is actually turning out a bit smaller 🙂 Thanks

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