@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_b_	skos:broader	isac:rectangular_area_ .
isac:_object_	skos:broader	isac:rectangular_area_ .
isac:_range_	skos:broader	isac:rectangular_area_ .
isac:_area_	skos:broader	isac:rectangular_area_ .
isac:_frame_	skos:broader	isac:rectangular_area_ .
isac:_zone_	skos:broader	isac:rectangular_area_ .
isac:_pixel_	skos:broader	isac:rectangular_area_ .