GeoJSON-LD Context and Vocabulary Publication

Sean Gillies — Mon, 09 Jan 2017 07:17:57 GMT

The work of defining a JSON-LD context and RDF vocabulary for GeoJSON is done. Documentation on version 1.0 of the context and context, including links to the JSON-LD and RDF docs, is published at http://geojson.org/geojson-ld/.

This work has no impact on most GeoJSON applications. For JSON-LD applications it provides a default context, allowing ordinary GeoJSON to be parsed (for the most part; see the outstanding issues noted at the end of the documentation) as though it were JSON-LD in a standard way, and helps make GeoJSON elements useful in other JSON-LD contexts.

Thanks to everyone who participated in the discussions on GitHub: Chaz6, ManoMarks, Roselin, adoyle, ajturner, akuckartz, azaroth42, calvinmetcalf, cappelaere, danbri, dinizime, dlongley, dr-shorthair, dret, ekansa, elf-pavlik, emeeks, erictheise, fils, gkellogg, hobu, jasnell, jyutzler, kgeographer, kgjenkins, ktk, lanthaler, letmaik, mitar, mpdaly, msporny, p3dr0, peterisb, pietercolpaert, retog, rtroncy, rybesh, sdrees, sfsheath, sgillies, thijsbrentjens, tschaub, and tstone. Because I drastically reduced the scope of the work toward the end, some of these contributions aren't reflected in the final products.

A vocabulary for describing the temporal extent of event-like features is one of the things that I cut from GeoJSON-LD. It lives on as a proposed extension for RFC 7946 GeoJSON, with no JSON-LD requirements, at https://sgillies.github.io/geojson-events/.

Work on resolving the mismatch between GeoJSON's nested coordinates array and JSON-LD could be part of the JSON-LD 1.1 discussion. Make sure to subscribe to public-linked-json@w3.org and https://github.com/json-ld/json-ld.org if you're interested in this issue.

JSON-LD and GeoJSON

Sean Gillies — Wed, 22 Jan 2014 07:00:00 GMT

JSON-LD, a a JSON-based serialization for Linked Data, is finally a W3C Recommendation. I'd like to remind readers that dumpgj, the any-vectors-to-GeoJSON program that is distributed with Fiona, will optionally add JSON-LD contexts to GeoJSON files.

$ dumpgj --help
usage: dumpgj [-h] [-d] [-n N] [--compact] [--encoding ENC]
              [--record-buffered] [--ignore-errors] [--use-ld-context]
              [--add-ld-context-item TERM=URI]
              infile [outfile]

Serialize a file's records or description to GeoJSON

positional arguments:
  infile                input file name
  outfile               output file name, defaults to stdout if omitted

optional arguments:
  -h, --help            show this help message and exit
  -d, --description     serialize file's data description (schema) only
  -n N, --indent N      indentation level in N number of chars
  --compact             use compact separators (',', ':')
  --encoding ENC        Specify encoding of the input file
  --record-buffered     Economical buffering of writes at record, not
                        collection (default), level
  --ignore-errors       log errors but do not stop serialization
  --use-ld-context      add a JSON-LD context to JSON output
  --add-ld-context-item TERM=URI
                        map a term to a URI and add it to the output's JSON LD
                        context

Sean Gillies (Posts about linked data)

GeoJSON-LD Context and Vocabulary Publication

JSON-LD and GeoJSON