[OSM-dev] [GSoC] Data Tile Service

[Michael Daines]

One more thing: screenshots from the web-based debugging tool.

  http://osm-data-tiles.tumblr.com/


On 2012-06-18, at 1:03 PM, Michael Daines wrote:

> Hello,
> 
> Here are some updates for the GSoC Data Tile Service project.
> 
> The repository for the tile rendering script is available here:
> 
>  https://github.com/mdaines/render-data-tile
> 
> The script will render JSON tiles using data imported to PostgreSQL/PostGIS with osm2pgsql. It can render individual tiles or a list of indices. There is also a web-based debugging tool in the debug directory which renders tiles on demand and displays them using HTML5 canvas and Leaflet.
> 
> I have been running the render and debug scripts with the geofabrik extract of the state of California. I have also been experimenting with rendering tiles for that entire area. Here is an example tile:
> 
>  http://temporary.mdaines.com/gsoc-2012/15-5238-12699.js
> 
> A note on file sizes: this particular tile is about 12K, and 3.2K gzipped. The corresponding Mapnik image is 14K (about the same size gzipped).
> 
> I have also created a page on the wiki for documenting the data tile format produced by the script:
> 
>  http://wiki.openstreetmap.org/wiki/Google_Summer_of_Code/2012/Data_Tile_Service/Tile_Format
> 
> The format is basically a subset of GeoJSON with the addition of the Kothic data tile format's "granularity" property. This allows coordinates to be expressed as integers relative to the tile's position.
> 
> This coming week I will be working on documentation, geometry simplification and filtering, and on making a set of tiles for the data I have been working with.
> 
> 
> -- Michael
>