@inproceedings{SIGMOD-2012-SarmaLGMH,
	author        = "Anish Das Sarma and Hongrae Lee and Hector Gonzalez and Jayant Madhavan and Alon Y. Halevy",
	booktitle     = "{Proceedings of the 30th ACM SIGMOD International Conference on Management of Data}",
	doi           = "10.1145/2213836.2213859",
	isbn          = "978-1-4503-1247-9",
	pages         = "193--204",
	publisher     = "{ACM}",
	title         = "{Efficient spatial sampling of large geographical tables}",
	year          = 2012,
}