Posted by Spartanicus on 02/02/06 13:20

Spartanicus <invalid@invalid.invalid> wrote:

>>When I right click on a .png file in windows explorer and go to properties I
>>get:
>>
>>Size 1.98 KB
>>Size on disk 4.00KB
>>
>>Well, why the difference
>
>Disk cluster sizes.
>
>>and which is the important figure for a budding web
>>designer?
>
>None, "Size on disk" is determined by the filesystem and size of the
>disk used by the user's system, none of your business.

I should have added that another figure not mentioned *is* an important
consideration: the "uncompressed size". Afaik this figure is not listed
by Windows Explorer, most graphic viewer applications will list it. The
"uncompressed size" is the amount of video RAM occupied if the image is
loaded.

A jpeg, gif or a png may take up only a small amount of bandwidth when
transferred, but it may expand to a huge size when uncompressed. This is
something to consider, especially with regard to portable devices.

--
Spartanicus

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