What is a logical unit?

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PaulStat

PaulStat

PaulStat

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My google skills suck, basically i'm looking for the definition of an LU? It's a measurement of length but I don't know how many LU's there in an inch say.
 
It's to do with print media, so yes it is computer related. But the type of LU's i'm talking about has nothing to do with networks, as that google link above indicates
 
A little tip for you:
If your ever looking for a definition of something go to google and type:
define: logical unit

It will give you back a definition for whatever your looking for from various sources. Quite useful.
 
Google threw up this:

There is a distinction between logical units and device units. Device units are the units native to the particular device—for a screen, a device unit is a pixel. For a printer, the device unit is defined by the resolution of the printer, which can be queried using GetSize (for a page size in device units) or GetSizeMM (for a page size in millimeters).

The mapping mode of the device context defines the unit of measurement used to convert logical units to device units. Note that some device contexts, in particular wxPostScriptDC, do not support mapping modes other than wxMM_TEXT. Table 5-1 lists the available mapping modes.
Table 5-1. Mapping Modes

wxMM_TWIPS


Each logical unit is 1/20 of a point, or 1/1440 of an inch.

wxMM_POINTS


Each logical unit is a point, or 1/72 of an inch.

wxMM_METRIC


Each logical unit is 1 millimeter.

wxMM_LOMETRIC


Each logical unit is 1/10 of a millimeter.

wxMM_TEXT


Each logical unit is 1 pixel. This is the default mode.

You can impose a further scale on your logical units by calling SetUser Scale, which multiplies with the scale implied by the mapping mode. For example, in wxMM_TEXT mode, a user scale value of (1.0, 1.0) makes logical and device units identical. By default, the mapping mode is wxMM_TEXT, and the scale is (1.0, 1.0).
Click to expand...

from http://www.phptr.com/articles/article.asp?p=405047&rl=1

Hope that helps :)
 
Unless you give us a specific context, it's hard to answer.

In all likliehood, it is not a discrete length, but, as the name implies, a derivation from another measure.

For example, in a row of houses, the logical unit is a house.

In a metre, the logical unit is a centimetre.
 
Thanks for re-opening the thread. And i've found the answer :)

144,000 LU's = 1 inch

I wasn't aware of this but apparently it's a unit my company arbitrarily (sp?) decided to make up, it's not written down it's just remembered by a few select people.

So thanks folks :), hopefully i've educated someone with this useless piece of information.
 
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