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<div class="moz-cite-prefix">Hi,<br>
<br>
Sounds interesting to me. Cartographers would love it! Esp. the
dragging along a line. Sounds like something for QGIS 2.1.<br>
<br>
The other thing that bothers me a lot is the efficient
(performant) labeling of banana-shaped polygons ... this would be
kind if it could still be fixed in QGIS 2.0. But I'd be also
patient and wait for 2.1 ;-)<br>
<br>
Thanks a lot,<br>
Andreas<br>
<br>
On 3/5/13 9:16 PM, Larry Shaffer wrote:<br>
</div>
<blockquote
cite="mid:CA+nQOR88S8m1A_aMJXTcvbpFGOYSgmv8dxq-rE4BfOte=oRfqQ@mail.gmail.com"
type="cite">
<div dir="ltr">Hi,<br>
<div class="gmail_extra"><br>
I have an idea concerning this that was originally cooked up
for an approach to doing multi-line curved labels [0]. I refer
to them as 'label anchors,' which would be for line and
polygon features (though they could be handy for point
features). The concept is roughly like so:<br>
<br>
</div>
<div class="gmail_extra">* An anchor point is sent into PAL that
constrains where a single label candidate is generated. The
point could be data defined or a reference to a calculate-able
point, e.g. midpoint, beginning/end, leftmost/rightmost,
nearest point on on line relative to off-line point, point
furthest from extent center, etc..<br>
<br>
</div>
<div class="gmail_extra">* With data defined anchors, a map tool
could be made that allows the user to visualize and
dynamically move the anchor along a line or even place the
anchor off the line (e.g., over a nearby related feature, like
a building-to-street relationship). This would allow data
defined curved labels to work like moving text along a path in
an illustration program, and allow for precise control over
label placement along a line without forcing full pinning of
the label.<br>
<br>
</div>
<div class="gmail_extra">* Additional options could be weighting
the above/below line labeling option (for off-line anchors),
and quadrant and offset placement of the label relative to
anchor.<br>
</div>
<div class="gmail_extra">
<br>
</div>
<div class="gmail_extra">There may be other advantages to
sending controllable label anchor points into PAL. This is
different than data defined x/y, which totally skips chosen
placement algorithms and essentially treats the feature
geometry as a point. Right now it is just conceptual, and I'd
like to hear some feedback.<br>
<br>
</div>
<div class="gmail_extra">Regards,<br>
<br>
</div>
<div class="gmail_extra">
Larry<br>
<br>
[0] <a moz-do-not-send="true"
href="http://hub.qgis.org/issues/4442">http://hub.qgis.org/issues/4442</a><br>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Tue, Mar 5, 2013 at 12:24 PM,
Andreas Neumann <span dir="ltr"><<a
moz-do-not-send="true" href="mailto:a.neumann@carto.net"
target="_blank">a.neumann@carto.net</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">Hi,<br>
<br>
So this sounds like its not happening any time soon.
Definitely after QGIS 2.0<br>
<br>
In this case I will do a helper layer and restrict that
line using linear referencing. My data is in Postgis and I
can use its linear referencing functions.<br>
<br>
For the long run I would want to get rid of that helper
layer and find a QGIS only solution.<br>
<br>
Thanks for your reply!<br>
<br>
Andreas<br>
<br>
On 3/5/13 8:13 PM, Martin Dobias wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
Hi Andreas<br>
<br>
On Tue, Mar 5, 2013 at 2:20 PM, Andreas Neumann <<a
moz-do-not-send="true"
href="mailto:a.neumann@carto.net" target="_blank">a.neumann@carto.net</a>>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px
0px 0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
Hi,<br>
<br>
Maybe Larry, Martin or Marco can answer this:<br>
<br>
I am looking for the possibility to label a line at
the start or end (plus a<br>
given offset from start/end). As far as I know this is
not yet possible now?<br>
Does PAL support this and is it a matter of exposing
this option in the GUI<br>
or is this not yet supported at all?<br>
</blockquote>
That's not supported as far as I know. It would be handy
to have a<br>
functionality in PAL that would allow us to constrain
where the label<br>
candidates should be created and how they should be
prioritized. That<br>
would also allow us to decide where to put labels for
point features<br>
and which positions are preferred.<br>
<br>
Martin<br>
</blockquote>
<br>
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</blockquote>
</div>
<br>
</div>
</div>
</blockquote>
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