Gouda Timemachine đź•“ Knowledge Graph

A knowledge graph of data about Gouda places (plots, buildings, addresses, bridges, watercourses, etc.) and people (residents, owners, administrators, etc.) linked to source information such as SAMH & Cadastre and thesauri such as GemeenteGeschiedenis and the Cultural Historical Thesaurus (RCE). Vocabularies used include schema.org, Records-in-context (RiCo), Persons-in-context (PiCo), PROV, Histograph and a proprietary Gouda Time Machine ontology.

Spatial Coverage
https://sws.geonames.org/2755420/
Temporal Coverage
1300-2020
Languages
Dutch
Issued
October 4, 2021
Modified
April 1, 2026

Linked Data Summary

43,090,021
Triples
282
Unique predicates
10,976,625
Unique objects
68%
32%
Literals: 7,488,458
URIs: 3,488,167

Classes

Class
Entities
omekas:Item
1,552,650
45%
pico:PersonObservation
1,048,395
31%
omekas:Media
283,667
8%
schema:ArchiveComponent
236,601
7%
goudatijdmac…/def#Perceel
58,138
2%
goudatijdmac…erAanduiding
41,434
1%

Properties

Property
Entities
omekas:title
3,070,400
25%
prov:hadPrimarySource
2,102,478
17%
omekas:id
1,836,677
15%
omekas:created
1,836,486
15%
omekas:modified
1,836,486
15%
omekas:owner
1,836,473
15%

Value Types

Value Type
Triples
xsd:string
8,889,006
31%
xsd:dateTime
6,777,980
23%
xsd:int
3,573,514
12%
xsd:boolean
3,389,273
12%
omekas:Item
3,261,608
11%
omekas:ItemSet
2,959,901
10%

Registration

Registered on
December 3, 2025 at 02:13 PM
Last read
53 minutes ago
Completeness
100%