TileStache: More Then You’re Granddad’s TileCache Server

An overview of the TileStache tiled web mapping server. Presented at the CUGOS Fall Fling Bling, October 2013.

Transcript

1. TileStache: More Then You’re Granddad’s TileCache Server Matt Kenny, Tableau Software @mattmakesmaps http://mattmakesmaps.com
2. Our Lightening-Fast Agenda • What is TileStache? • What does it Cache/Render? • How can it be extended?
3. What is it? “TileStache is a Python-based server application that can serve up map tiles based on rendered geographic data.” - http://tilestache.org
4. Distinct Functionality • Caches: Instructions for storing tiles generated via a Provider class instance. • Providers: Instructions for rendering a tile in a specifc format (raster/vector) from a specific data source (postgis/shp). • Configuration File: Links providers with caches.
5. Caches
6. Providers • Supported Raster-Based: • mapnik • MBTiles • Remote WMS Services
7. Providers
8. Providers • Supported Non-Raster Based: • TopoJSON • GeoJSON/BSON • Arc GeoServices JSON/BSON (ESRI) • UTF Grids
9. TopoJSON - Requirements • PostGIS DB • Spherical Mercator (EPSG:900913) / WGS84 <-- Out of the Box
10. TopoJSON - Config Example 01: "layers": { 02: "osm-processed_p10": { 03: "allowed origin": "*", 04: "provider": { 05: "class": "TileStache.Goodies.VecTiles:Provider", 06: "kwargs": { 07: "dbinfo": { 08: "host": "localhost", 09: "user": "matt", 10: "database": "ts_data" 11: }, 12: "simplify": 10.0, 13: "queries": [ 14: "SELECT gid, geom AS __geometry__ FROM 15: osm.land_polygons_split" 16: ] 17: }}}}
13. Extending “It should be quick and easy to understand what the library is doing and why... Where possible, dynamic programming “magic” is to be avoided, in favor of basic, procedural and copiously-documented Python.” - Project Docs
14. Extending class ProviderStub: def __init__(self, layer): # create a new provider for a layer raise NotImplementedError def renderTile(self, width, height, srs, coord): # return an object with a PIL-like save() method for a tile raise NotImplementedError def renderArea(self, width, height, srs, xmin, ymin, xmax, ymax, zoom): # return an object with a PIL-like save() method for an area raise NotImplementedError
15. +
16. GIF Layer - Config File 01:        "gif_layer":  { 02:            "provider":  { 03:                "class":  "TileStache.Goodies.Providers.GiphyAPI:Provider", 04:                "kwargs":  { 05:                        "api_key":  "dc6zaTOxFJmzC", 06:                        "search_term":  "pizza-­‐cat", 07:                        "num_gifs":  16, 08:                        "num_threads":  4 09:                        } 10:            } 11:        }
17. Demo Time http://mattmakesmaps.github.io/TileStache-GiphyAPI-Demo/
18. Thanks! Slides/Links: http://mattmakesmaps.com twitter: @mattmakesmaps e-mail: matthewkenny@gmail.com