CityJSON Metadata
It is recommended to define metadata for the 3D City Model in the respective param.json. While a minimum example with a brief explanation of the metadata parameters are given here the reader is encouraged to explore the comprehensive CityJSON Specifications.
Table of contents
Title
"cjsn_title": "LoD1 City Model of rural village, Mamre, Cape Town",
referenceDate
"cjsn_referenceDate": "2021-07-31",
referenceSystem
Coordinate reference system (crs) definition is formatted according to the OGC Name Type Specification:
http://www.opengis.net/def/crs/{authority}/{version}/{code}
where {authority} designates the authority responsible for the definition of the crs
(usually “EPSG” or “OGC”), and {version} designates the specific version of the crs
(“0” (zero) is used if there is no version).
"cjsn_referenceSystem": "https://www.opengis.net/def/crs/EPSG/0/32734",
pointOfContact
"pointOfContact" is defined through
"cjsn_contactName": "arkriger",
"cjsn_emailAddress": "adrian-kriger@gmail.com",
"cjsn_website": "www.linkedin.com/in/adrian-kriger",
"cjsn_contactType": "private",
+metadata-extended
Acknowledging the source of the raster DEM is possible.
"cjsn_+meta-description": "Chief Directorate: National Geo-spatial Information",
"cjsn_+meta-sourceSpatialResolution": "25 meter raster DEM",
"cjsn_+meta-sourceReferenceSystem": "urn:ogc:def:crs:EPSG:20481",
"cjsn_+meta-sourceCitation":"http://www.ngi.gov.za/",
The osm attribution and osm_LoD1_3DCityModel processing is hardcoded (fixed) as:
"source": [
{
"description": "OpenStreetMap contributors",
"sourceReferenceSystem": "urn:ogc:def:crs:EPSG:4326",
"sourceCitation": "https://www.openstreetmap.org",
}],
"processStep": {
"description" : "Processing of building vector contributions <raster DEM> using osm_LoD1_3DCityModel workflow",
"processor": {
"contactName": param['cjsn_contactName'],
"contactType": param['cjsn_contactType'],
"website": "https://github.com/AdrianKriger/osm_LoD1_3DCityModel"