I posted this on openlayers-users about a GeoJSON hack I did in OL2.
http://osgeo-org.1560.x6.nabble.com/GeoJSON-tiles-tt5104115.html
-- Jack
On 04/08/14 22:51, Luca Morandini wrote:
G'day everyone,
I know this has been proposed before, and taht there are vector tiles
available in OL3, but... we (the AURIN project) cannot wait for OL3,
and we do need vector tiles now. I was tasked with sounding out the
feasibility of it, hence bear me while I state my case.
I have developed a nice vector tile server in Node.js, backed by
PostGIS and using CouchDB as cache; the output formats are GeoJSON and
TopoJSON.
To use the tiles produced by said server I need, of course, a client,
possibly one merging tiled polygons into the original ones when the
format is TopoJSON (the end result is a seamless layer).
I developed such a client with Leaflet, backed by JSTS and D3 for the
merging bit, and it works rather well; I tried to do the same with OL3
Beta4, but failed... hence I would like to give OL2 a try (our current
UI is built on OL2).
Having said that, I would like to know what's the state of the art
related to TMS vector tiles in OL2.
As far as I know, there was an attempt (see links below), but it did
not make it to the code base: does anyone know if there had been a
blocker during the implementation of this capability ?
In addition, I would love to here comments and hints on how to
implement this TMS-TopoJSON-cum-merging layer type.
http://openlayerstools.sourceforge.net/src/Strategy_TFS.js
http://openlayerstools.sourceforge.net/examples/TFS.html
Regards,
Luca Morandini
Data Architect - AURIN project
Melbourne eResearch Group
Department of Computing and Information Systems
University of Melbourne
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