# TerraFabric Ontology — generated by terrafabric-server
# version 1.0.0

@prefix tf: <https://terrafabric.world/ont#> .
@prefix tfr: <https://terrafabric.world/id/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix prov: <http://www.w3.org/ns/prov#> .
@prefix sosa: <http://www.w3.org/ns/sosa/> .
@prefix ssn: <http://www.w3.org/ns/ssn/> .
@prefix geo: <http://www.opengis.net/ont/geosparql#> .
@prefix schema: <https://schema.org/> .
@prefix odrl: <http://www.w3.org/ns/odrl/2/> .

<https://terrafabric.world/id/collection/opentopography-raster> a tf:DataProductCollection ;
    dct:identifier "opentopography-raster" ;
    dct:title "OpenTopography Raster DEM Catalog and Tile Footprints" ;
    dct:description "Native static STAC discovery for OpenTopography global elevation products and regional lidar-derived DEMs. The footprint adapter progressively follows collections and items, exposes published dataset geometry and individual raster-asset bounding boxes, and retains source DOI, citation, license and COG links. Dataset acquisition intervals remain separate from item publication timestamps." ;
    tf:providedBy <https://terrafabric.world/id/provider/opentopography> ;
    tf:dataTier tf:tier-product ;
    tf:processingLevel tf:level-L3 ;
    tf:accessClass "free" ;
    tf:hasModality tf:modality-elevation ;
    tf:dataCategory tf:category-model ;
    tf:hasPlatform <https://terrafabric.world/id/platform/dataset-specific-airborne-and-satellite-surveys> ;
    tf:hasInstrument <https://terrafabric.world/id/instrument/dataset-specific-elevation-measurements> ;
    tf:allWeather false ;
    tf:nightCapable false ;
    tf:taskable false ;
    tf:license <https://terrafabric.world/id/license/provider-terms> ;
    tf:releasability tf:marking-public ;
    dcat:keyword "earth-observation" ;
    dcat:keyword "terrain" ;
    dcat:keyword "topography" ;
    dcat:keyword "elevation" ;
    dcat:keyword "dem" ;
    dcat:keyword "lidar-derived" ;
    dcat:keyword "raster" ;
    dcat:keyword "static-stac" ;
    dcat:keyword "geospatial" ;
    tf:spatialExtent <https://terrafabric.world/id/collection/opentopography-raster/extent/spatial> ;
    tf:temporalExtent <https://terrafabric.world/id/collection/opentopography-raster/extent/temporal> ;
    tf:format <https://terrafabric.world/id/format/stac> ;
    tf:format <https://terrafabric.world/id/format/cog> ;
    tf:format <https://terrafabric.world/id/format/geotiff> ;
    tf:format <https://terrafabric.world/id/format/vrt> ;
    tf:accessibleVia <https://terrafabric.world/id/collection/opentopography-raster/access/0> ;
    tf:accessibleVia <https://terrafabric.world/id/collection/opentopography-raster/access/1> .

<https://terrafabric.world/id/collection/opentopography-raster/extent/spatial> a tf:SpatialExtent ;
    tf:bbox "-180,-90,180,90" ;
    tf:asWKT "POLYGON((-180 -90,180 -90,180 90,-180 90,-180 -90))"^^geo:wktLiteral .

<https://terrafabric.world/id/collection/opentopography-raster/extent/temporal> a tf:TemporalExtent ;
    tf:startDate "2026-09-30"^^xsd:date .

<https://terrafabric.world/id/collection/opentopography-raster/access/0> a tf:AccessMethod ;
    tf:accessKind "https" ;
    tf:endpointURL "https://portal.opentopography.org/stac_browser/"^^xsd:anyURI .

<https://terrafabric.world/id/collection/opentopography-raster/access/1> a tf:AccessMethod ;
    tf:accessKind "stac-catalog" ;
    tf:endpointURL "https://portal.opentopography.org/stac/raster_catalog.json"^^xsd:anyURI .