[Geoserver-users] Error Using the Pregeneralized Features module on Geoserver

GeoServer GeoServer User
1

Hello,

I am trying to use the pregeneralized features extension for limiting the
number of vertices drawn for a large dataset that resides in PostGIS
(geometry type 'MultiLineString'). I've been through the tutorials and the
help forums and adjusted my .xml config file in many different ways
according to all the info I've found. I have also set up my Generalizing
Data Store on geoserver in the exact manner that was specified in this
tutorial:

http://osgeo-org.1560.x6.nabble.com/attachment/3819796/0/pregen_tutorial.html
<http://osgeo-org.1560.x6.nabble.com/attachment/3819796/0/pregen_tutorial.html&gt;

After zooming and panning around in OpenLayers, I am still receiving the
following message in the geoserver logs:
"2014-10-08 10:00:10,973 WARN [org.geotools.data.gen] - No hint for geometry
distance in query, fallback to base feature"

From my understanding, this means that something in the config file is not

right and geoserver is defaulting to the base "the_geom" column for
rendering the pipelines.

Here is my .xml file:

<?xml version="1.0" encoding="UTF-8"?>
<GeneralizationInfos version="1.0">
  <GeneralizationInfo dataSourceNameSpace="pipelines_pregen"
dataSourceName="pipelines"
featureName="pipelines_general_tx_1"
baseFeatureName="domestic_pipelines_tx_1" geomPropertyName="the_geom">
    <Generalization distance="5000" featureName="domestic_pipelines_tx_1"
geomPropertyName="the_geom5000"/>
  </GeneralizationInfo>
</GeneralizationInfos>

I've checked and all the parameters are populated correctly in the xml file
according to the guidelines laid out in this thread:

http://osgeo-org.1560.x6.nabble.com/New-postgis-feature-pregeneralized-tutorial-question-tp3797025p3797026.html
<http://osgeo-org.1560.x6.nabble.com/New-postgis-feature-pregeneralized-tutorial-question-tp3797025p3797026.html&gt;

Does anybody know of any reasons why this would be failing to generalize my
features? Any help would be greatly appreciated!

Thanks!

--
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2

Hi Joel

No, this is not an error in your configuration.

The renderer component does not pass a proper hint to the Data Source, the result is the log message

“No hint for geometry distance in query, fallback to base feature”

and the original geometry is used.

@Andrea
I think this a regression. The problem is here
org.geotools.data.gen.PreGeneralizedFeatureSource.getRequestedDistance(Query)

Should Joel Open a JIRA issue.

Cheers
Christian

···

On Wed, Oct 8, 2014 at 6:00 PM, joel.schmitt <joel.schmitt@anonymised.com> wrote:

Hello,

I am trying to use the pregeneralized features extension for limiting the
number of vertices drawn for a large dataset that resides in PostGIS
(geometry type ‘MultiLineString’). I’ve been through the tutorials and the
help forums and adjusted my .xml config file in many different ways
according to all the info I’ve found. I have also set up my Generalizing
Data Store on geoserver in the exact manner that was specified in this
tutorial:

http://osgeo-org.1560.x6.nabble.com/attachment/3819796/0/pregen_tutorial.html
<http://osgeo-org.1560.x6.nabble.com/attachment/3819796/0/pregen_tutorial.html>

After zooming and panning around in OpenLayers, I am still receiving the
following message in the geoserver logs:
“2014-10-08 10:00:10,973 WARN [org.geotools.data.gen] - No hint for geometry
distance in query, fallback to base feature”

From my understanding, this means that something in the config file is not
right and geoserver is defaulting to the base “the_geom” column for
rendering the pipelines.

Here is my .xml file:

<?xml version="1.0" encoding="UTF-8"?>

I’ve checked and all the parameters are populated correctly in the xml file
according to the guidelines laid out in this thread:

http://osgeo-org.1560.x6.nabble.com/New-postgis-feature-pregeneralized-tutorial-question-tp3797025p3797026.html
<http://osgeo-org.1560.x6.nabble.com/New-postgis-feature-pregeneralized-tutorial-question-tp3797025p3797026.html>

Does anybody know of any reasons why this would be failing to generalize my
features? Any help would be greatly appreciated!

Thanks!

–
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OSS Open Source Solutions GmbH

3

Christian-- Thank you for responding to my issue. I'm assuming Andrea is an
admin for this forum as I've seen her in plenty of other threads giving very
helpful, Geoserver-specific advice.

Do you think I should go ahead and open a JIRA issue?

Thanks again,
Joel

--
View this message in context: http://osgeo-org.1560.x6.nabble.com/Error-Using-the-Pregeneralized-Features-module-on-Geoserver-tp5166527p5167240.html
Sent from the GeoServer - User mailing list archive at Nabble.com.

4

On Mon, Oct 13, 2014 at 4:13 PM, joel.schmitt <joel.schmitt@anonymised.com

wrote:

Christian-- Thank you for responding to my issue. I'm assuming Andrea is an
admin for this forum as I've seen her in plenty of other threads giving
very
helpful, Geoserver-specific advice.

That would be a "him" :-p

Do you think I should go ahead and open a JIRA issue?

Please do open

Cheers
Andrea

--

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