GeoJSON+

Author: Florian Thiery (i3mainz)

Revision: 1.0

Date: 2017-11-17

Abstract: GeoJSON+ is an extended version of GeoJSON for aligning gazetteers. GeoJSON+ defines a base datamodel for accessing single resources and a look up in different "classical" gazetteers, like GeoNames, Pleiades, Getty TGN, etc. It is also extented for space-time gazetteers like ChronOntology.

Copyright: This work is licensed under a Creative Commons Attribution 4.0 International License.

GitHub repository

See https://github.com/linkedgeodesy/geojson-plus for datamodel developments.

Datamodel

See https://github.com/linkedgeodesy/geojson-plus/blob/master/datamodel.md for datamodel descriptions.

Gazetteer GeoJSON

Resource: 
        
    {
      "type": "Feature",
      "geometry": {},
      "properties": {
        "@id": "",
        "gazetteerid": "",
        "gazetteertype": "",
        "names": {}
      }
    }
Search: 
        
    {
          "type": "FeatureCollection",
          "features": [
            {
              "type": "Feature",
              "geometry": {},
              "properties": {
                "@id": "",
                "gazetteerid": "",
                "gazetteertype": "",
                "names": {},
                "similarity": {}
              }
            }
          ],
          "metadata": {
            "gazetteertype": "",
            "searchstring": "",
            "upperleftLon": "",
            "lowerleftLon": "",
            "lowerrightLat": "",
            "upperrightLon": "",
            "upperleftLat": "",
            "lowerleftLat": "",
            "lowerrightLon": "",
            "upperrightLat": ""
          }
    }

ChronOntology GeoJSON

        
    {
      "type": "FeatureCollection",
      "features": [
        {
          "type": "Feature",
          "geometry": {},
          "properties": {
            "@id": "",
            "gazetteerid": "",
            "gazetteertype": "",
            "names": {},
            "gazetteerrelation": ""
          }
        }
      ],
      "metadata": {
        "@id": "",
        "periodid": "",
        "chronontology": {},
        "names": {},
        "when": [],
        "coverage": []
      }
    }

Names JSON

        
    {
      "prefName": {
        "name": "römisch",
        "lang": "de"
      },
      "de": ["Römisch", "römisch"],
      "en": ["greek", "Greek"]
    }

Similarity JSON

        
    {
    	"distance": 1.36,
    	"bboxcenter": [8.266449999999999, 49.993275999999994],
    	"point": [8.2791, 49.98419]
    }
    
        
    {
      "searchString": "Mainz",
      "gazetteerString": "Wiesbaden-Mainz-Kastel",
      "levenshtein": 17.0,
      "dameraulevenshtein": 17.0,
      "jarowinkler": 0.68,
      "normalizedlevenshtein": 0.77
    }

Linked Data

The GeoJSON+ Linked Data Vocabulary is published as RDF/XML at http://geojsonplus.linkedgeodesy.org/vocab.rdf.

An HTML version is published at http://geojsonplus.linkedgeodesy.org/vocab.

Outstanding issues

The "when" array is under development, see ChronOntology Timespan fields. It is similar to the GeoJSON-T structure of "when". The inner structure is different and points to the Chronontology structures.

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