Chinese blue days: a novel index and spatio-temporal variations

A Novel Spatio-Temporal Data Storage and Index Method for ARM-Based Hadoop Server

During the past decade, a vast number of GPS devices have produced massive amounts of data containing both time and spatial information. This poses a great challenge for traditional spatial databases. With the development of distributed cloud computing, many highperformance cloud platforms have been built, which can be used to process such spatio-temporal data. In this research, to store and pr...

Efficient Index Structures for Spatio-Temporal Objects

In this article we present a family of four tree-based access structures for indexing spatio-temporal objects. Our indexing methods support spatio-temporal, as well as purely spatial and purely temporal queries. 111 order to handle sets of extended spatio-teniporal objects we propose to specialize generalized search trees by combining the advantages of the well-known spatial structures R*-tree ...

A New method to Index and Store Spatio-Temporal Data

We propose a data structure that stores, in a compressed way, object trajectories, which at the same time, allow to efficiently response queries without the need to decompress the data. We use a data structure, called K2-tree, to store the full position of all objects at regular time intervals. For storing the positions of objects between two time instants represented with K2-trees, we only enc...

Assessment of spatio-temporal variations of surface water quality and prioritization of pollution Sources (case Study: Talar Watershed, Mazandaran province)

Spatio-Temporal Analysis of Drought Vulnerability using the Standardized Precipitation Index (Case study: Semnan Province, Iran)

This study was conducted to identify drought event and its emerging regions in Markazi desert, Iran with focus onSemnan province in a 30 years statistical period. In this research, 61 stations having adequate data selected and usedafter extracting annual statistic from monthly and daily data. Standardized precipitation index values for each stationwere calculated and classified. The Results hav...