Re: [gdal-dev] Vector Tiles in OGR

Ok thanks. On Wed, Feb 14, 2018 at 8:00 AM, Even Rouault wrote: > > > > > Great news. Is it possible to provide a user defined list of resolutions > > > for the custom scheme which are not power of two? > > > > Not implemented, but could potentially be done > > > >

Re: [gdal-dev] Vector Tiles in OGR

> > Great news. Is it possible to provide a user defined list of resolutions > for the custom scheme which are not power of two? Not implemented, but could potentially be done Even -- Spatialys - Geospatial professional services http://www.spatialys.com

Re: [gdal-dev] Vector Tiles in OGR

> > > > > OK, I've added a TILING_SCHEME dataset creation option to define such as > custom tiling scheme. See > > https://trac.osgeo.org/gdal/changeset/41470#file1 > > for how to use it and how it impacts metadata.json > > > > Note that this is only implement for file tilesets and not for MBTILES

Re: [gdal-dev] Vector Tiles in OGR

> >> Hi, > >> > >> At the moment we create MVT tiles from PostGIS with ST_AsMVT to suit with > >> the national gridset that is based on ETRS-TM35FIN (EPSG:3067) coordinate > >> system. How difficult would you consider to enhance the driver to split > >> and > >> write vector tiles according to

Re: [gdal-dev] Vector Tiles in OGR

Even Rouault wrote: >On mardi 13 février 2018 02:06:47 CET jratike80 wrote: >> Even Rouault-2 wrote >> >> > On lundi 22 janvier 2018 23:40:55 CET Even Rouault wrote: >> >> Hi, >> >> >> >> > P.S. @Even: Any news on a GDAL/OGR MVT reader? >> >> >> >> Yes, a new OGR MVT reader has just been

Re: [gdal-dev] Vector Tiles in OGR

Hi all No there's no standard about non-Webmercator usage of vector tiles. TileJSON spec. leaves open how CRS is handled which was a wise decision. So it's up to us to come up with a proposal. But what's bad is, that TileJSON is not even up-to-date to describe vector tiles. At least MBTiles

Re: [gdal-dev] Vector Tiles in OGR

On mardi 13 février 2018 02:06:47 CET jratike80 wrote: > Even Rouault-2 wrote > > > On lundi 22 janvier 2018 23:40:55 CET Even Rouault wrote: > >> Hi, > >> > >> > P.S. @Even: Any news on a GDAL/OGR MVT reader? > >> > >> Yes, a new OGR MVT reader has just been committed in GDAL trunk: > >>

Re: [gdal-dev] Vector Tiles in OGR

Even Rouault-2 wrote > On lundi 22 janvier 2018 23:40:55 CET Even Rouault wrote: >> Hi, >> >> > P.S. @Even: Any news on a GDAL/OGR MVT reader? >> >> Yes, a new OGR MVT reader has just been committed in GDAL trunk: >> http://gdal.org/drv_mvt.html > > And the writer part (for MVT and MBTILES)

Re: [gdal-dev] Vector Tiles in OGR

On lundi 22 janvier 2018 23:40:55 CET Even Rouault wrote: > Hi, > > > P.S. @Even: Any news on a GDAL/OGR MVT reader? > > Yes, a new OGR MVT reader has just been committed in GDAL trunk: > http://gdal.org/drv_mvt.html And the writer part (for MVT and MBTILES) driver is now in trunk

Re: [gdal-dev] Vector Tiles in OGR

2018-01-29 14:51 GMT+01:00 Even Rouault : > Yeah, I didn't really found a specification for those. Just my experiments > with various MBTiles / directory of tiles found in the wild, and those I > produced with tippecanoe. OGR has quite some impact and the announced

Re: [gdal-dev] Vector Tiles in OGR

On lundi 29 janvier 2018 10:21:04 CET Stefan Keller wrote: > Hi Even > > Great news about this MVT reader! > > The docs [1] says: > > The MVT driver only uses the "json" key to retrieve the layer names, their > > fields and the geometry type, and the "bounds" key for the layer extent. > I just

Re: [gdal-dev] Vector Tiles in OGR

Hi Even Great news about this MVT reader! The docs [1] says: > The MVT driver only uses the "json" key to retrieve the layer names, their > fields and the geometry type, and the "bounds" key for the layer extent. I just wanted to point you to the spec. discussion of MBTiles and TileJSON

Re: [gdal-dev] Vector Tiles in OGR

On mardi 23 janvier 2018 13:10:30 CET Jaak Laineste wrote: > Hey, > > I read the drv doc, it was not completely clear how OGR handles exactly > multi-resolution specifics; as OGR data model does not really “support” > multi-resolution vector in data model level AFAIK. Indeed, there's no

Re: [gdal-dev] Vector Tiles in OGR

Hi, > P.S. @Even: Any news on a GDAL/OGR MVT reader? Yes, a new OGR MVT reader has just been committed in GDAL trunk: http://gdal.org/drv_mvt.html Even -- Spatialys - Geospatial professional services http://www.spatialys.com ___ gdal-dev mailing

Re: [gdal-dev] Vector Tiles in OGR

-- Forwarded message -- From: Even Rouault <even.roua...@spatialys.com> Date: 2017-04-17 11:44 GMT+02:00 Subject: Re: [gdal-dev] Vector Tiles in OGR To: Stefan Keller <sfkel...@gmail.com> Cc: Gdal-Dev <gdal-dev@lists.osgeo.org>, Flippmoke <flippm...@gmail.com>, Even Roua

Re: [gdal-dev] Vector Tiles in OGR

Hi Stefan, > P.S. @Even: Any news on a GDAL/OGR MVT reader? No activity on this front as far as I know. There was a possible funding opportunity recently for a project that would have involved integating such a driver with QGIS, but the odds for it to come true seems to be very low according

Re: [gdal-dev] Vector Tiles in OGR

Hi, @All FYI: We just released an experimental MVT reader for QGIS: http://plugins.qgis.org/plugins/Vector-Tiles-Reader-QGIS-Plugin/ Pls. test :-) @Blake: 1. Because QGIS needs to know the CRS we have a problem, since the TileJSON spec. leaves this open. There are already non-Mercator MVT

Re: [gdal-dev] Vector Tiles in OGR

Blake, Sorry for iterating: I checked the spec. and analyzed a sample of Mapbox vector tiles: The spec. does not mention null tiles but there are tiles generated by Mapbox which are empty/null (to save space). I seems to me that Mapbox GL JS then backs up and takes the data from a tile at a

Re: [gdal-dev] Vector Tiles in OGR

al-dev] Vector Tiles in OGR Blake, Sorry for iterating: I checked the spec. and analyzed a sample of Mapbox vector tiles: The spec. does not mention null tiles but there are tiles generated by Mapbox which are empty/null (to save space). I seems to me that Mapbox GL JS then backs up and takes the dat

Re: [gdal-dev] Vector Tiles in OGR

;even.roua...@mines-paris.org<mailto:even.roua...@mines-paris.org>> Betreff: Re: [gdal-dev] Vector Tiles in OGR Benjamin Stadin, As an author of the specification, I have to disagree with you on the support for other projections. There is no limitation on vector tiles being required to

Re: [gdal-dev] Vector Tiles in OGR

Hi Blake, There is TileMaker [1]. It implements a MVT writer for v1 only as it seems, but looks lightweight enough as a good base for a portable library. Ben [1] https://github.com/systemed/tilemaker/blob/master/src/write_geometry.cpp Am 01.02.16, 18:27 schrieb "gdal-dev on behalf of

Re: [gdal-dev] Vector Tiles in OGR

That's good news! We'll be happy to add Python bindings to such a generic C++ library for Mapbox vector tiles. We have still some time (say few weeks?) left here to decide to contribute either to these bindings or to Mapzen's pure Python lib. One reason why I'm insisting on Python (bindings) -

Re: [gdal-dev] Vector Tiles in OGR

Hi Stefan, A vector tile may contain data for several zoom levels. But what data is shown at which zoom level is defined by the styling, not by the data itself. It is handled on client side, by the web (or native) tile renderer. The path is the same as with mercator tiles (zoomLevel/x/y):

Re: [gdal-dev] Vector Tiles in OGR

Hi Stefan, "If there would be OGR driver for vector tiles it would make a similar resource extremely useful also for other purposes in GIS tools - not only for tileservers and direct visualisation.“ I was thinking you want to do more than just rendering. Then at least, as Blake also mentioned,

Re: [gdal-dev] Vector Tiles in OGR

All, I¹d like to share a few thoughts about the current state of vector tiles. I believe that, with vector data, there is a chance to get rid of some of the problems that current mapping tools face in practice, especially in regards to projections. And this chance should be used in my opinion,

Re: [gdal-dev] Vector Tiles in OGR

Hi Ben Thanks for explaining - Petr and I are the maintainers of OSM2Vectortiles. I like projections (and also GeoPackage :-) ). But reprojection is solved here, since OGR/QGIS can transform on the fly. This thread is about Petr's question about a reader "for mapbox-like vector tiles stored in

Re: [gdal-dev] Vector Tiles in OGR

Benjamin Stadin, As an author of the specification, I have to disagree with you on the support for other projections. There is no limitation on vector tiles being required to being in mercator. The specification in fact mentions that other projections may be used:

Re: [gdal-dev] Vector Tiles in OGR

Blake, Now the vector tiles spec. and the Mapbox approach became clearer to me. I'm still pondering about realizing a vector tiles reader (especially for QGIS) and for vector tiles uses cases like 1. base maps and 2. spatial analysis: Regarding clipped linestrings and polygons arriving at

Re: [gdal-dev] Vector Tiles in OGR

Hi Blake It's clear to me that a good generic c++ library for encoding and decoding vector tiles is needed. On the other hand, I'd like to experiment with vector tiles and related QGIS parallel loading issues for which Python is more convenient. It seems that Mapzen's [1] Python implementation

Re: [gdal-dev] Vector Tiles in OGR

Blake, Thanks for the comments. Regarding leaving out data at intermediate zoom levels I also meant omitting (setting to null) the entire tile. In fact I just realize that the spec. even does not mention how a reader knows at which level it should expect data if a tile is null/empty. :Stefan

Re: [gdal-dev] Vector Tiles in OGR

Stefan, I am not aware of any libraries besides mapnik vector tile that have been attempting to implement v2 specification. I think mapzen's implementation might be best? We have been wanting to add vector tiles to the python mapnik bindings for quite some time but we don't have the time to

Re: [gdal-dev] Vector Tiles in OGR

All, The first thing that is going to be required likely is a good generic c++ library for encoding and decoding vector tiles IMO. I have spent a lot of time working on developing the mapnik vector tile library to be a solid implementation, especially around all the work done for 2.0 of

Re: [gdal-dev] Vector Tiles in OGR

Hi Petr, Blake, Even and everybody I'm (besides Petr) the other maintainer of OSM2VectorTiles. I'd already asked Even a similar question. I'm advising now an intern to implement such a MVT Vector Tiles reader client in Python if possible as part of a QGIS plugin. And I'm interested not to do

Re: [gdal-dev] Vector Tiles in OGR

Le mardi 05 janvier 2016 21:06:55, Blake Thompson a écrit : > Petr, > > No one that I know of is currently working on such a tool. It could be a > little difficult to write as well. > > Each Tile is its own discrete dataset therefore the hardest part would be > merging of features into the

Re: [gdal-dev] Vector Tiles in OGR

Hi everybody, thanks for the comments. Regarding the technical details: Each Tile is its own discrete dataset therefore the hardest part would be > merging of features into the original features across tiles. You could use > some complicated merging technique, but that could be very expensive. >

[gdal-dev] Vector Tiles in OGR

Hi, Is anybody working on an OGR driver for mapbox-like vector tiles (PBF blobs) stored in MBTiles or downloaded from a url via curl? If this is done, all the GDAL-powered tools could access the vector features available in vector tiles directly - it means vector data in QGIS and Grass for any

Re: [gdal-dev] Vector Tiles in OGR

Petr, No one that I know of is currently working on such a tool. It could be a little difficult to write as well. Each Tile is its own discrete dataset therefore the hardest part would be merging of features into the original features across tiles. You could use some complicated merging

Re: [gdal-dev] Vector Tiles in OGR

Even, He is correct that MBTiles can store vector tiles. I know this is done in https://github.com/mapbox/tippecanoe . I believe there is talk about updating the MBTiles Spec as well. Thanks, Blake Thompson On Tue, Jan 5, 2016 at 2:21 PM, Even Rouault wrote: > Le

Re: [gdal-dev] Vector Tiles in OGR

Le mardi 05 janvier 2016 19:33:32, Petr Pridal a écrit : > Hi, > > Is anybody working on an OGR driver for mapbox-like vector tiles (PBF > blobs) stored in MBTiles or downloaded from a url via curl? Hi Petr, I was involved in discussions a few months ago where Mapbox Vector Tiles read/write

Re: [gdal-dev] Vector Tiles in OGR

quot; <fisc...@mapbox.com<mailto:fisc...@mapbox.com>> Cc: "gdal-dev@lists.osgeo.org<mailto:gdal-dev@lists.osgeo.org>" <gdal-dev@lists.osgeo.org<mailto:gdal-dev@lists.osgeo.org>> Betreff: Re: [gdal-dev] Vector Tiles in OGR Even, He is correct that MBTi