[gdal-dev] tiled vector map

[Jaak Laineste]

Hello,

I would think of tiled vector map data as multi-resolution dataset, in several means more similar to multi-resolution raster datasets than vector datasets. 

But this would be interesting challenge. I assume you want to take some vector data (e.g. Shapefiles) and convert them to vector tiles. With shapefiles (and more or less any other GIS/OGR vector format what I know) you have just one resolution. You could take this and convert it to e.g. mapbox vector tile format, with given resolution (zoom level). Now to make it really usable in interactive web or mobile map you would need also lower level tiles. With ordinary rasters the lower level is made using quite clear downsampling. With vector tiles there are a lot of design-specific decisions - what layers to keep, what to remove (e.g. in usual map you have buildings in high resolution, but not in lower ones), what layers to transform or simplify. This depends on map design; so multi-zoom vector tileset is actually design-specific, not universial vector data what you can redesign anyway as you may think. So tools which create vector tiles have this kind of style (zoom/layer) definitions for conversion. You can use e.g. Mapnik to render vector data to vector tiles, it is more similar to creating raster maps than to convert vectors, I guess Mapbox works like that.

Considering these specifics adding OGR driver to write (and read) e.g. mapbox vector tiles, or mapsforge format should be doable. Note also that there is no single standard tiled vector map, there are some known vendor-specific formats, most popular ones seem to be mapbox vector tiles and mapsforge. If anyone is already working on this, then I would be interested also.


Jaak
Nutiteq


> On 05 Sep 2015, at 21:23, Ahmet Temiz <ahmettemiz88 at gmail.com> wrote:
> 
> hello
> 
> Is it possible to create tiled vector map with ogr ?
> 
> kind regards
> 
> -- 
> Ahmet Temiz
> Jeoloji Müh.
> Afet ve Acil Durum Yönetimi Başkanlığı
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> 
> 
> ________________________
> 
> Ahmet Temiz
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