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That's just out of this world isn't it?
What's out of this world you ask.
Why the base point in a drawing when it
receives a new value other than the World Coordinate system of course!
Anytime that you move the origin point you are in a user
defined coordinate system.
To illustrate this concept start a new drawing from scratch using English
feet and inches. Enter the base command and
notice that the base point is 0,0,0 in the World coordinate system.
Now move the UCS icon to a new location, say
1,1,0. Issue the base command again and notice the drawings base point
placement is now -1,-1,0. Just remember that
once the UCS origin is no longer 0,0,0 and set to World, all actions
associated to the coordinate system have changed also. This
means that when you insert this drawing into another, the base point has
changed!
If you draw a line from the coordinates 0,0 to 6,0 with the UCS origin at
1,1,0 the Properties box will list that the line has an X value of 0,0.
If you change the UCS back to World, the X
value listing will now be 1,1,0. Be careful
when using the LIST command or the properties box when the UCS origin has
changed!
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