{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,9,15]],"date-time":"2024-09-15T22:31:49Z","timestamp":1726439509280},"reference-count":20,"publisher":"World Scientific Pub Co Pte Ltd","issue":"02","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int. J. Coop. Info. Syst."],"published-print":{"date-parts":[[2015,6]]},"abstract":" Earth-Science data are composite, multi-dimensional and of significant size, and as such, continue to pose a number of ongoing problems regarding their management. With new and diverse information sources emerging as well as rates of generated data continuously increasing, a persistent challenge becomes more pressing: To make the information existing in multiple heterogeneous resources readily available. The widespread use of the XML data-exchange format has enabled the rapid accumulation of semi-structured metadata for Earth-Science data. In this paper, we exploit this popular use of XML and present the means for querying metadata emanating from multiple sources in a succinct and effective way. Thereby, we release the user from the very tedious and time consuming task of examining individual XML descriptions one by one. Our approach, termed Meta-Array Data Search (MAD Search), brings together diverse data sources while enhancing the user-friendliness of the underlying information sources. We gather metadata using different standards and construct an amalgamated service with the help of tools that discover and harvest such metadata; this service facilitates the end-user by offering easy and timely access to all metadata. The main contribution of our work is a novel query language termed xWCPS, that builds on top of two widely-adopted standards: XQuery and the Web Coverage Processing Service (WCPS). xWCPS furnishes a rich set of features regarding the way scientific data can be queried with. Our proposed unified language allows for requesting metadata while also giving processing directives. Consequently, the xWCPS-enabled MAD Search helps in both retrieval and processing of large data sets hosted in an heterogeneous infrastructure. We demonstrate the effectiveness of our approach through diverse use-cases that provide insights into the syntactic power and overall expressiveness of xWCPS. We evaluate MAD Search in a distributed environment that comprises five high-volume array-databases whose sizes range between 20 and 100 GB and so, we ascertain the applicability and potential of our proposal. <\/jats:p>","DOI":"10.1142\/s0218843015500021","type":"journal-article","created":{"date-parts":[[2015,7,6]],"date-time":"2015-07-06T03:41:38Z","timestamp":1436154098000},"page":"1550002","source":"Crossref","is-referenced-by-count":8,"title":["A Distributed Infrastructure for Earth-Science Big Data Retrieval"],"prefix":"10.1142","volume":"24","author":[{"given":"Panagiotis","family":"Liakos","sequence":"first","affiliation":[{"name":"Athena Research and Innovation Center, 15125 Maroussi, Greece"}]},{"given":"Panagiota","family":"Koltsida","sequence":"additional","affiliation":[{"name":"Athena Research and Innovation Center, 15125 Maroussi, Greece"}]},{"given":"George","family":"Kakaletris","sequence":"additional","affiliation":[{"name":"Athena Research and Innovation Center, 15125 Maroussi, Greece"}]},{"given":"Peter","family":"Baumann","sequence":"additional","affiliation":[{"name":"Jacobs University Bremen, 28759 Bremen, Germany"}]},{"given":"Yannis","family":"Ioannidis","sequence":"additional","affiliation":[{"name":"Athena Research and Innovation Center, 15125 Maroussi, Greece"},{"name":"University of Athens, 15784 Athens, Greece"}]},{"given":"Alex","family":"Delis","sequence":"additional","affiliation":[{"name":"Athena Research and Innovation Center, 15125 Maroussi, Greece"},{"name":"University of Athens, 15784 Athens, Greece"}]}],"member":"219","published-online":{"date-parts":[[2015,7,30]]},"reference":[{"key":"p_1","doi-asserted-by":"publisher","DOI":"10.1145\/1107499.1107503"},{"key":"p_2","doi-asserted-by":"publisher","DOI":"10.1145\/1743546.1743568"},{"key":"p_3","doi-asserted-by":"publisher","DOI":"10.1002\/spe.1050"},{"key":"p_4","doi-asserted-by":"publisher","DOI":"10.1007\/BF01231603"},{"key":"p_5","first-page":"963","author":"Brown P. 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