Georges, The only effect of adding MaxScaleDenominator is that the layer won't be shown at scales smaller than 1:1.000.000. If you would like to display the ZNIEFF layer at scales smaller than 1:1.000.000 or you want fast display times than 3 or 4 seconds at scales larger than 1:1.000.000, you may want to look into generalising your features with our without the plugin.
Furthermore, adding caching headers doesn't change anything for the server-side rendering, of course! It only controls whether the browser will take the image from the browser cache or make a new request to the server. Edward Date: Fri, 23 Oct 2015 19:28:49 +0200 Subject: Re: [Geoserver-users] Layer very slow to display From: [email protected] To: [email protected] CC: [email protected]; [email protected] Hi, thanks for advices ! I had already a spatial index. Then, after yours advices, I have added another index on the gid field, without changes. Then , always thanks to yours advices, I have added an "<MaxScaleDenominator>1000000</MaxScaleDenominator>" in my SLD. And indeed, after this, just 3 or 4 seconds are necessary to load the layer. It is better ! Then, I have added a "Header HTTP cache". And when the layer has already been display, it display immediately ! Cool ! But do you really think that with "Pregeneralized Features" I will can improve the display speed of this layer ? Can I just improve changing my "MaxScaleDenominator" ? Thanks 2015-10-23 16:25 GMT+02:00 Edward Mac Gillavry <[email protected]>: Georges, >From the link you sent along, the map scale appears to be 1:9M. Spatial >indexes have their benefits when zoomed in to do a quick bounding-box comparison if I understand Geoserver workings correctly. When you are zoomed out to 1:9M, it will simply retrieve all features. Maybe, you can add scale-dependent rules in the SLD: i.e. don't show all features on all zoom levels. This particularly is for the ZNIEFF regions! Opening your WMS in QGIS, I zoomed in to 1:300.000 and added the ZNIEFF layer. Then, I was able to view them :-) It's not a matter of the number of ZNIEFF features, but the level of detail in their outlines. These outlines follow river beds and mountain valleys it seems. Maybe use generalised versions of these features to display these areas at smaller scales. You can simply add new layers that have the generalised outlines in a Layergroup for ZNIEFF, or more advanced, use the GeoServer extension "Pregeneralized Features": http://docs.geoserver.org/latest/en/user/data/vector/featurepregen.html Best of luck, Edward > From: [email protected] > To: [email protected]; [email protected] > Date: Fri, 23 Oct 2015 11:37:54 +0000 > Subject: Re: [Geoserver-users] Layer very slow to display > > Is it a lack of an index on the table? > > Russ > > > -------Original Message------- > > From: Georges H <[email protected]> > > To: geoserver-users <[email protected]> > > Subject: [Geoserver-users] Layer very slow to display > > Sent: 23 Oct '15 11:28 > > > > Hi > > > > I have a layer very slow to display (from a Postgres DB), I do not > > understand why, beacause I have other layers which I think to be more > > bigger, without problem, and also from Postgres DB. > > > > Here for example: > > http://cartoperso.com/gs271/DRIIHM/wms? > service=WMS&version=1.1.0&request=GetMap&layers=DRIIHM:znieffs&styles=&bbox=-5.14112752212846,41.329845 > 4351757,9.55966584021411,51.090843415036&width=768&height=509&srs=EPSG:4326&format=application/open > layers > > > > What do you think about ? Are there ways to improve the display speed > > on Geoserver, > > > > Thank you ! > > > > GEORGES HINOT > > CNRS - DRIIHM - UMS BBEES (3468) > > > > Musée d'Histoire Naturelle de Paris, Maison Buffon > > > > Géomaticien - Administrateur BDD - Intégrateur > > [email protected] > > [email protected] > > _Tél : 01 40 79 80 44_ > > _Tél : 06 47 61 84 92_ > > Le site du LabEx DRIIHM > > > > Le métacalogue du LabEx DRIIHM > > > > ------------------------- > > > > ------------------------------------------------------------------------------ > > > > ------------------------- > > _______________________________________________ > > Geoserver-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/geoserver-users > > > > ------------------------------------------------------------------------------ > _______________________________________________ > Geoserver-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/geoserver-users -- Georges HinotCNRS - DRIIHM - UMS BBEES (3468) Musée d'Histoire Naturelle de Paris, Maison Buffon Géomaticien - Administrateur BDD - Inté[email protected] [email protected]él : 01 40 79 80 44Tél : 06 47 61 84 92Le site du LabEx DRIIHM Le métacalogue du LabEx DRIIHM
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