This HTML5 document contains 4 embedded RDF statements represented using HTML+Microdata notation.

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PrefixNamespace IRI
n5androidpit.
isaphttp://webisa.webdatacommons.org/prov/
isahttp://webisa.webdatacommons.org/
rdfhttp://www.w3.org/1999/02/22-rdf-syntax-ns#
provhttp://www.w3.org/ns/prov#
xsdhhttp://www.w3.org/2001/XMLSchema#
Subject Item
isa:232637410
rdf:type
prov:Entity
prov:value
It is OSM. But, you can add roads, stairs, and other things by logging into OSM and use the Edit function.
prov:wasQuotedFrom
n5:com
Subject Item
isap:369935703
prov:wasDerivedFrom
isa:232637410