I think my problem could be solved by minGroupDistance but that option doesn’t
seem to do anything in Geoserver 2.9.0.
From: andrea.a...@gmail.com [mailto:andrea.a...@gmail.com] On Behalf Of Andrea
Aime
Sent: 3. heinäkuuta 2016 23:14
To: Kanninen Anssi EXT
Cc: geoserver-users@lists.sourceforge.net
Subject: Re: [Geoserver-users] Road number labeling difficulties
On Sun, Jul 3, 2016 at 9:31 PM, Kanninen Anssi EXT
<anssi.kanni...@digia.com<mailto:anssi.kanni...@digia.com>> wrote:
Hi Andrea!
There may indeed be some discontinuation between the segments but what would
that change? I still want the labels have an equal space between them.
It would allow the JTS LineMerge algorithm to create one single large line,
that is then labelled according to the other directives (repeate)
The example data in my screenshots is the example data provided by Geoserver so
I assume it is be valid.
Err... that data has been heavily simplified to keep the size of the download
small, so I would not
count on it being valid.
That said, I re-read your first mail properly (10pm saturday night, I'm not in
a rush like in a usual work day) and took the time
to actually setup the style on a demo server:
http://demo.geo-solutions.it/geoserver/tiger/wms?service=WMS&version=1.1.0&request=GetMap&layers=tiger:tiger_roads&styles=r11&bbox=-74.02722,40.684221,-73.907005,40.878178&width=476&height=768&srs=EPSG:4326&format=application/openlayers#toggle
At least in some parts the data is actually disconnected, or otherwise not
forming a single line, e.g.:
http://demo.geo-solutions.it/geoserver/tiger/wms?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&FORMAT=image%2Fpng&TRANSPARENT=true&STYLES=r11&LAYERS=tiger%3Atiger_roads&SRS=EPSG%3A4326&WIDTH=1600&HEIGHT=768&BBOX=-73.99920701980591%2C40.75648784637451%2C-73.96487474441528%2C40.77296733856201
http://demo.geo-solutions.it/geoserver/tiger/wms?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&FORMAT=image%2Fpng&TRANSPARENT=true&STYLES=r11&LAYERS=tiger%3Atiger_roads&SRS=EPSG%3A4326&WIDTH=950&HEIGHT=600&BBOX=-73.9958381652832%2C40.73277711868286%2C-73.98564577102661%2C40.7392144203186
http://demo.geo-solutions.it/geoserver/tiger/wms?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&FORMAT=image%2Fpng&TRANSPARENT=true&STYLES=r11&LAYERS=tiger%3Atiger_roads&SRS=EPSG%3A4326&WIDTH=950&HEIGHT=600&BBOX=-74.01639461517334%2C40.70351421833038%2C-74.01129841804504%2C40.706732869148254
In other cases however it might a numeric issue, since by the time the labeller
gets the lines they have been generalized and transformed to screen space, but
with different roundings (what was touching before might not be exactly
touching after). I did not
investigate further, but there might be room for improvement there... I'm not
sure it's going to be a quick fix however, I guess
we'd have to round all ordinates to the nearest pixel before trying to attempt
the LineMerge.
That said, it's speculation, might be something else.
Cheers
Andrea
--
==
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Ing. Andrea Aime
@geowolf
Technical Lead
GeoSolutions S.A.S.
Via di Montramito 3/A
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phone: +39 0584 962313
fax: +39 0584 1660272
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