[Geoserver-users] Geoserver-users Digest, Vol 122, Issue 68

GeoServer GeoServer User
1

Hi Peter,

Nope, separating Graphic and Label elements in 2 different rules would of course handle well the relative displacement but wouldn’t manage the labels overlapping.

The labels overlapping is the main reason of using both Graphic and Label in the same rule: it ensures that each Label is drawn over a Marker, then also avoids the overlapping of different pairs Marker+Label.

My particular requirement is to have:

  • a pair Marker+Label for each point

  • pairs Marker+Label shall not overlap when zooming the map

  • the Marker is centered on the point geom (X,Y)

  • the Label is centered on the point geom (X+DELTAX,Y)

Something similar with the well-known case of roads shields (the road number in the middle of a road marker) but where the road number is not centered on the marker but it is written on the right side of the marker.

Did someone already find a solution to this?

Thanks,

Victor

2

On Tue, Jul 26, 2016 at 8:41 AM, Victor.Sinceac <Victor.Sinceac@anonymised.com>
wrote:

Did someone already find a solution to this?

Hi Victor,
I don't believe it's possible, it would require some development.
I assume one could just use the displacement element in the graphic,
assuming
the natural position is label center, and allowing to move the graphic
somewhere else
compared to it... but there is no code evaluating it now.

This would be a new feature request, see here on how to handle it:
https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer

Cheers
Andrea

--

GeoServer Professional Services from the experts! Visit
http://goo.gl/it488V for more information.

Ing. Andrea Aime
@geowolf
Technical Lead

GeoSolutions S.A.S.
Via di Montramito 3/A
55054 Massarosa (LU)
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 339 8844549

http://www.geo-solutions.it
http://twitter.com/geosolutions_it

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3

Hi Peter,

Nope, separating Graphic and Label elements in 2 different rules would of course handle well the relative displacement but wouldn’t manage the labels overlapping.

The labels overlapping is the main reason of using both Graphic and Label in the same rule: it ensures that each Label is drawn over a Marker, then also avoids the overlapping of different pairs Marker+Label.

My particular requirement is to have:

  • a pair Marker+Label for each point

  • pairs Marker+Label shall not overlap when zooming the map

  • the Marker is centered on the point geom (X,Y)

  • the Label is centered on the point geom (X+DELTAX,Y)

Something similar with the well-known case of roads shields (the road number in the middle of a road marker) but where the road number is not centered on the marker but it is written on the right side of the marker.

Did someone already find a solution to this?

Thanks,

Victor

4

On Tue, Jul 26, 2016 at 10:43 AM, Peter Kovac <peter.kovac@anonymised.com

wrote:

Hi Victor,

as an alternative to what Andrea has suggested you might try to prepare a
custom image for the graphic symbol, which is appropriately offset and has
transparent background. Then use the displacement only to displace the
label.

However, I'm not sure if GeoServer is clever enough to figure out that
transparent parts of the images are actually not overlapping, you'll have
to try it.

Nope, GeoServer does not check the graphics content, it just assumes it's
bounding box is fully opaque

Cheers
Andrea

--

GeoServer Professional Services from the experts! Visit
http://goo.gl/it488V for more information.

Ing. Andrea Aime
@geowolf
Technical Lead

GeoSolutions S.A.S.
Via di Montramito 3/A
55054 Massarosa (LU)
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 339 8844549

http://www.geo-solutions.it
http://twitter.com/geosolutions_it

*AVVERTENZE AI SENSI DEL D.Lgs. 196/2003*

Le informazioni contenute in questo messaggio di posta elettronica e/o
nel/i file/s allegato/i sono da considerarsi strettamente riservate. Il
loro utilizzo è consentito esclusivamente al destinatario del messaggio,
per le finalità indicate nel messaggio stesso. Qualora riceviate questo
messaggio senza esserne il destinatario, Vi preghiamo cortesemente di
darcene notizia via e-mail e di procedere alla distruzione del messaggio
stesso, cancellandolo dal Vostro sistema. Conservare il messaggio stesso,
divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od
utilizzarlo per finalità diverse, costituisce comportamento contrario ai
principi dettati dal D.Lgs. 196/2003.

The information in this message and/or attachments, is intended solely for
the attention and use of the named addressee(s) and may be confidential or
proprietary in nature or covered by the provisions of privacy act
(Legislative Decree June, 30 2003, no.196 - Italy's New Data Protection
Code).Any use not in accord with its purpose, any disclosure, reproduction,
copying, distribution, or either dissemination, either whole or partial, is
strictly forbidden except previous formal approval of the named
addressee(s). If you are not the intended recipient, please contact
immediately the sender by telephone, fax or e-mail and delete the
information in this message that has been received in error. The sender
does not give any warranty or accept liability as the content, accuracy or
completeness of sent messages and accepts no responsibility for changes
made after they were sent or for other risks which arise as a result of
e-mail transmission, viruses, etc.

-------------------------------------------------------