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Indeed, if the two scraps are joined, then using -outline out
creates a hole which is not colored.<br>
<br>
The main problem in this configuration is that the bottom scrap
should close its outline contour using the pit line rather than
using an implicit line connecting the two shortest points where the
contour is open. However, connecting the wall of the bottom scrap to
the pit line does not solve the problem since the pit line should
have outline out on the top scrap and outline in on the bottom
scrap. The solution I used to patch that was to duplicate the
geometry of the pit line of the top scrap into a "wall:invisible"
line (inversely oriented to have the correct orientation) on the
bottom scrap. When the two scarps are not deformed too differently,
this works. But if the scraps are deformed differently, then the top
and bottom lines are deformed independently and differently and this
can create a small hole. <br>
<br>
This is basically the same solution as the one Footleg just
proposed. I wish there would be a more principled way of joining two
scraps along a shared line.<br>
<br>
Xavier<br>
<br>
<br>
<div class="moz-cite-prefix">Le 10-May-19 à 14:31, Footleg a écrit :<br>
</div>
<blockquote type="cite"
cite="mid:CAJkGg4=FgRB=MR3TMDPHVN70k+Gh0U=g=t26Fi19gzoBUo2jmQ@mail.gmail.com">
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<div dir="ltr">I do this sort of thing a lot. You just need an
equivalent line in the lower (blue) survey with -outline out to
extend the blue scrap border to cover the white hole in your
plan. I generally use an invisible wall line (so does not need
'-outline out' option specifying) and make it slightly larger
than the curved pit line so the overlap of the scraps is
maintained even if a bit of distortion is applied due to loop
closure corrections. As long as the scraps are in the same map
level (i.e. not separated by a break) then the upper scrap will
hide the overlapping area of the lower one. You cannot 'join'
the scraps automatically now as neither will have an opening in
the outline at the pit now. So if you need to join them to keep
them aligned you have to specify the exact line points to join
to pin the points at either end of the curved lines to each
other in the pair of scraps.
<div><br>
</div>
<div>Footleg</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Fri, 10 May 2019 at 12:42,
Tarquin Wilton-Jones via Therion <<a
href="mailto:therion@speleo.sk" moz-do-not-send="true">therion@speleo.sk</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Thanks
for the reply.<br>
<br>
> Adding the option -outline out to the (closed) line of
your pit on the<br>
> top scrap should create the whole that you want in the
blue color so<br>
> that you will see the green color of the bottom scrap.<br>
<br>
See attached for what happens when you do that. I need the
blue to fill<br>
the blank area. Blue and green belong to different surveys, so
getting<br>
them to perfectly match the curve of each other manually is
... hard.<br>
<br>
Is there a way to create a scrap within the green survey
(where it is<br>
easy to perfectly follow the same line), but tell it to take
it's<br>
altitude colour from the blue scrap instead?<br>
_______________________________________________<br>
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</blockquote>
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<br>
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<pre class="moz-signature" cols="72">--
> -------------------------
> Xavier Pennec
> Senior Research Scientist / Directeur de recherche
> Asclepios project-team, INRIA Sophia-Antipolis
> 2004 Route des Lucioles, BP93
> F-06902 Sophia-Antipolis Cedex, France
> +33 4 92 38 76 64
> +33 6 78 35 16 90
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