[Qgis-developer] Fwd: [Qgis-user] regularly spaced address markers on alternating side of road

[Neumann, Andreas]

Hi, 

I am forwarding this interesting symbology / labeling problem to the
dev-list, perhaps someone has an idea with the existing symbology
options / geometry generators / expressions / some Python magic. 

See also
http://lists.osgeo.org/pipermail/qgis-user/2016-June/036842.html  

What I am personally also interested in, is getting access to the index
nr of a marker. If every marker knew  - I am the first, second, third,
etc. marker, we could use it in expressions and add dynamic marker
content and change properties based on the marker index. 

Or, we could have per feature counters/iterators that either allow to
calculate n marker or label positions on the fly. 

Something to consider for QGIS 3.0 ;-) 

Andreas 

-------- Original Message -------- 

 		SUBJECT:
 		[Qgis-user] regularly spaced address markers on alternating side of
road

 		DATE:
 		2016-06-29 07:11

 		FROM:
 		Dan Jacobson <jidanni at jidanni.org>

 		TO:
 		qgis-user at lists.osgeo.org

I want to label vectors (roads) with proposed addresses:

21  23  25  27  29
==================
  22  24  26  28

I suppose I will use the Qchainage plugin and then post-process the
output with a simple perl script to get the exact labels I want (20, 30,
40...).

I don't suppose I can make them on either side of the road so I suppose
I will have to put them along the centerline.

There are no houses here. Just guide points for government workers if
houses were ever to be built.

I can't use StackExchange to ask this because I don't have enough Karma
and never will.
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