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Date: Mon, 17 Aug 2015 11:57:15 -0400
Message-Id: <201508171557.t7HFvFka015445@envy.delorie.com>
From: DJ Delorie <dj AT delorie DOT com>
To: geda-user AT delorie DOT com
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Subject: Re: [geda-user] PCB footprints - what is the best way to change
 origin location on existing footprint?
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> My understanding is the origin is located at
> (2850.00mil,2600.00mil).  And the reference designator is positioned
> at (-31.50mil,-31.50mil) relative to the origin.  How does one
> interpret these (2850.00mil,2600.00mil) numbers for the origin?

The standard library should have (0,0) there, because that coordinate
in the Element[] field is its location relative to the PCB itself.
(If ome of them doesn't, it may affect where the element is placed
when you manually place it.)

I.e. that element is at (2850.00mil,2600.00mil) *on the pcb*.

Thus, pcb will position that element such that its mark falls on
(2850.00mil,2600.00mil).