Online Access

Overview

The following interfaces exist for online access:

  • Rest Api: provides basic access to a database with a full Open Street Map (OSM) planet file loaded.
  • Sparql Endpoints: enable queries on databases with a reduced (but hopefully for many applications relevant) subset of the whole data loaded. The Sparql Endpoints come in two flavours:
    • Static: Contains the data extracted from a OSM planet file of a certain date
    • Live: Initially a copy of the static version that is then synchronized with the minutely updates from OSM.

As of 2012 February 1st, the Virtuoso database powering the live SPARQL endpoint is not synchronized anymore. It will be replaced with the SPARQL endpoint provided by Sparqlify in the coming weeks, which will provide access to all data rather than just a subset.

A summary of the capabilities of the interfaces are given below. Click the above links for the detailed documentation and the Sparql Endpoints, respectively.

REST API

Features

  • Access to all nodes and ways and their tags of a planet file.
  • Supports content negotiation
  • Retrieval of RDF data for individual nodes and ways

http://linkedgeodata.org/triplify/node264695865
http://linkedgeodata.org/triplify/way27743320

  • Retrieval of data within circular and rectangular area

http://linkedgeodata.org/api/3/intersects/51.033333,13.733333/1/class/Amenity (1km radius around given point)
http://linkedgeodata.org/api/3/intersects/51.02–51.04,13.72–13.74/class/University


For more examples and a detailed documentation please refer to this page.

Sparql Endpoints

Flavours

  • Static: Contains the data extracted from a OSM planet file of a certain date
  • Live: Initially a copy of the static version that is then synchronised with the minutely

Features

  • Full Virtuoso SPARQL query capabilities
  • Access to > 220mio triples
  • Static and live versions

Drawbacks

  • Entities and tags undergo a filtering procedure (explained here), therefore not all available OSM data is being loaded into the store.

For more examples and a detailed documentation please refer to this page.


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Last Modification: 2014-03-19 01:54:49 by Claus Stadler