On Tue, Mar 31, 2015 at 3:19 PM, Nachtigall, Jens (init) <
jens.nachtig...@init.de> wrote:
> Hi again,
>
>
>
> I really do not understand why it takes weeks for a simple 100 MB
> Shapefile with just LineStrings in Germany to render. 99.99 % of all tiles
> are just empty/transparent PNGs anyways, rest is just some red lines… I
> googled and found
> http://gis.stackexchange.com/questions/20712/geoserver-wms-tile-rendering-is-too-slow
>
>
>
> 1. Would it make a difference to add a spatial index to the Shapefile? (I
> did not check if it has one, I would assume that GeoServer just adds one if
> necessary – how can I check if this has been done?)
>
No idea the index should be built automatically, and it would be a .qix
file (assuming the directory where the shapefile
is is writable).
Can you share the shapefile in question, would be interesting to try it out
locally.
>
>
> 2. Also, we use the GeoServer-CSS extension. But the style is as simple as
> this:
>
> * {
>
> fill: #e31a1c;
>
> fill-opacity: 0.27;
>
Why did you add a fill for linestrings? This forces GeoServer to paint them
as polygons (closing them to form a polygon, start to end point) and fill
them.
> stroke: #e31a1c;
>
> stroke-width: 1;
>
> stroke-opacity: 1;
>
> }
>
> Anyway, can this be related to the long seeding times?
>
>
> 3. Maybe some kind of metatiling can be used to speed things up?
>
>
>
> For OSM rendering with mapnik for same extent and much more features, it
> took just a few days. So I really do not get it, why it takes weeks for a
> damn simply Shapefile.
>
It would be interesting to use the exact same shapefile and style in mapnik
and see how different it is (osm styles are setup to avoid painting too
much information at the same time, which
aslo helps a lot to speed up rendering)
Cheers
Andrea
--
==
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