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		| Paper: | 
		Coverage and Lacunarity of Astronomical Datasets | 
	 
	
		| Volume: | 
		527, Astronomical Data Analysis Software and Systems XXIX | 
	 
	
		| Page: | 
		77 | 
	 
	
		| Authors: | 
		Derriere, S. | 
	 
	
	
		| Abstract: | 
		We present the use of MOCs (Multi-Order Coverage maps) associated to HiPS datasets (Hierarchical Progressive Surveys) to assess the sky coverage of various datasets, but also their lacunarity (presence of holes or scattered distribution). | 
	 
	
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