Elaheh Pourabbas, Maurizio Rafanelli. A Pictorial Query Language for Querying Geographic Databases using Positional and OLAP Operators. SIGMOD Record, 31(2):22-27, 2002. [doi]
@article{PourabbasR02,
title = {A Pictorial Query Language for Querying Geographic Databases using Positional and OLAP Operators},
author = {Elaheh Pourabbas and Maurizio Rafanelli},
year = {2002},
doi = {10.1145/565117.565121},
url = {http://doi.acm.org/10.1145/565117.565121},
tags = {query language},
researchr = {https://researchr.org/publication/PourabbasR02},
cites = {0},
citedby = {0},
journal = {SIGMOD Record},
volume = {31},
number = {2},
pages = {22-27},
}