[gdal-dev] Recommended OGR Driver For Very Large Vector Data

[Patrick Young]

Yeah it's not the geopackage format but that the polygons are just huge,
sorry about that.  There is ~1000 polygons but each one is a ton of
vertices (~100k), so zoomed out the redraw takes a little while (seconds).
This is true with fileGBD too, which feels slower than the gpkg FWIW.  In
practice we have a simplified version of the data we usually deal with and
that is plenty fast.

I guess the dream is a format that has "overviews" but for vector data.
Maybe gpkg already supports this idea? I haven't really dug into either
format, so apologies for my naivety.

On Sun, Aug 5, 2018 at 11:15 AM, jratike80 <
jukka.rahkonen at maanmittauslaitos.fi> wrote:

> Patrick Young wrote
> > We also tried a GeoPackage, but it seemed a little slow to read in QGIS.
>
> Hi,
>
> Could you give some more details about your GeoPackage and what you mean
> with "little slow"? I have pretty good experiences about using GeoPackage
> as
> data source for MapServer.  I also just tried how a polygon layer with 1.1
> million polygons behaves with QGIS and panning and zooming is pretty much
> immediate when the map scale is reasonable. With reasonable scale I mean
> that roughly 50000 polygons or less fits the map view so that the spatial
> index can drop most of the records.
>
> -Jukka Rahkonen-
>
>
>
>
> --
> Sent from: http://osgeo-org.1560.x6.nabble.com/GDAL-Dev-f3742093.html
> _______________________________________________
> gdal-dev mailing list
> gdal-dev at lists.osgeo.org
> https://lists.osgeo.org/mailman/listinfo/gdal-dev
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/gdal-dev/attachments/20180807/cf43748c/attachment.html>