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Date: Sat, 11 Aug 2012 08:20:58 +1000
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Subject: Re: [geda-user] grids
From: Stephen Ecob <stephen DOT ecob AT sioi DOT com DOT au>
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On Fri, Aug 10, 2012 at 9:36 PM, Levente <leventelist AT gmail DOT com> wrote:
> Hi all,
> Regardless of the grid units settings, PCB allways write the GRID[] line in
> imperial. If you change the grid from say 0.1mm to 0.05mm, the grid will be
> in imperial, and rounding errors occure. If you reload the file, the grid is
> fine. I noticed that the grid setting is also stored in attributes. Why
> store the grid in two places in the same file?

Historical reasons.  The GRID statement with imperial units is the old
approach, retained for compatibility (it allows old builds of PCB to
load your layout).

Stephen Ecob
Silicon On Inspiration
Sydney Australia
www.sioi.com.au
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