Hi Nikolai
Oh sorry, was reading the mail in a rush and meant raster tiles.
I don't have much experience with vector tiles. Afaik, they come without
symbolisation? If yes, is there a reason why the vector tile serving
needs to be inside QGIS server? Or could you just use another
application that you point to the datasource?
E.g. there is an interesting new project called t-rex
(https://github.com/pka/t-rex), afaik it supports PBF.
Regards,
Marco
Am 19.06.2016 um 01:51 schrieb Nikolai Bezdna:
Hi Marco,
As far as I know vector tiles can’t be generated out of WMS services,
because WMS spec is mostly used for getting raster images (GetMap
request) or feature information (GetFeatureInfo request) and some others.
I guess you meant WFS really, but I don’t know any caching server
implementations that use WFS as a background and generate vector tiled
PBFs (particularly in Mapbox Vector Tiles spec
<https://github.com/mapbox/vector-tile-spec>).
I didn’t use MapServer MapCache <http://www.mapserver.org/mapcache/>,
but according to the docs it doesn’t support vector tiles, only raster
ones. MapProxy and TileCache don’t support them either. TileStache can
produce vector tiles out of OGR datasource, but in GeoJSON format,
which is way heavier than PBF, even gzipped.
So the good way to go would be to use the OGR MVT driver, but
unfortunately it’s not released and the status of it’s development is
unknown. While web is moving fast towards in-browser rendering
(OpenLayers3 and Mapbox GL already utilise WebGL for that) it’s
becoming clear QGIS server should support vector tiles at some point.
Should I start with a feature request maybe?
Regards,
Nick
From: Marco Hugentobler <marco.hugentob...@sourcepole.ch
<mailto:marco.hugentob...@sourcepole.ch>>
To: qgis-developer@lists.osgeo.org <mailto:qgis-developer@lists.osgeo.org>
Subject: Re: [Qgis-developer] Any plans for implementing vector tile
generation on QGIS Server?
Message-ID: <5765066c.3000...@sourcepole.ch
<mailto:5765066c.3000...@sourcepole.ch>>
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Hi Nikolai
Most vector tile generators can work with any WMS in the background.
E.g. using MapCache with QGIS server should be perfectly possible.
Regards,
Marco
On 06/18/16 10:13, Nikolai Bezdna wrote:
I’d like to know if there are any plans for enabling serving vector
tiles from QGIS Server, so they can be used in client libraries like
Mapbox GL afterwards. Seems like GDAL (OGR really) MVT driver is stuck
in development and there already are some stand-alone implementations,
like utilery (https://github.com/tilery/utilery) or Mapnik vector tile
(https://github.com/mapbox/mapnik-vector-tile), but nothing is
integrated with QGIS server. Since Mapbox and ESRI adopted MVT, and
most major web basemaps (like Google, Apple etc.) are already vector
tile based, it seems like QGIS is running a bit behind in this field.
So it would be great to start a discussion on utilising vector tile
spec within QGIS.
Cheers
--
Dr. Marco Hugentobler
Sourcepole - Linux & Open Source Solutions
Weberstrasse 5, CH-8004 Zürich, Switzerland
marco.hugentob...@sourcepole.ch http://www.sourcepole.ch
Technical Advisor QGIS Project Steering Committee
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