using cartodb to analyze openstreetmap data
Post on 15-Jan-2015
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Analyzing OpenStreetMap using CartoDB
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Senior scientist and developer @vizzualityFind me @andrewxhill
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User, developer, and pusher of limits @cartodbFind me @andrewxhill
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blog.cartodb.comSunday, October 14, 12
So tell me already,What is CartoDB?
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CartoDB is a tool to build applications and master your geospatial data
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Importing OSM data into CartoDB it’s sooooo easy
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We support directly importing OSM and other formats too!
shp, csv, kml, etc
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CartoDB uses osm2pgsql it keeps it simple
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1 OSM file becomes 4 CartoDB tables
1. Points2. Polygons3. Roads4. Linestrings
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Import local data from .org or mirror simple drag-drop support on most browsers
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Or! Import directly from URL www.openstreetmap.org
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From here the sky is the limit combine SQL, CartoCSS, and APIs with ease
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no. seriously.
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SQLremember. it’s everywhere
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EMBEDsql is everywhere
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SQL APIsql is everywhere
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youraccount/osmtable/11/1022/679.png
youraccount/osmtable/11/1022/679.png?yada WHERE rail
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CREATIVITYsql is everywhere
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not for me
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CLIENT SIDELeaflet, Google Maps, Backbone, D3
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ORmore practical things
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INNOVATIONthey don’t let us sleep...
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_I want to see ‘X’ over timeusing the SQL API with big data
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WITH hgrid AS (SELECT Cdb_rectanglegrid(Cdb_xyz_extent(8, 12, 5), Cdb_xyz_resolution(5) * 4, Cdb_xyz_resolution(5) * 4) AS cell) SELECT x, y, Array_agg(c) vals, Array_agg(d) dates FROM (SELECT St_xmax(hgrid.cell) x, St_ymax(hgrid.cell) y, Count(i.cartodb_id) c, Floor(( Date_part('epoch', built) -‐ -‐10418716800 ) / 32837875) d FROM hgrid, us_po_offices i WHERE St_intersects(i.the_geom_webmercator, hgrid.cell) GROUP BY hgrid.cell, Floor(( Date_part('epoch', built) -‐ -‐10418716800 ) / 32837875) ) f GROUP BY x, y
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Raw Datacube
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https://dl.dropbox.com/u/580074/osm_edits_in_madrid.mov
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That’s CartoDB + OpenStreetMap in a nutshell come talk to me, I’m sure I missed much more
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xº
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Thanks!@andrewxhill
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