Results 1 to 10 of about 5,483,277 (408)
Optimizing Spatial Databases [PDF]
SSRN Electronic Journal, 2011 This paper describes the best way to improve the optimization of spatial databases: through spatial indexes. The most commune and utilized spatial indexes are R-tree and Quadtree and they are presented, analyzed and compared in this paper. Also there are given a few examples of queries that run in Oracle Spatial and are being supported by an R-tree ...
Anda Velicanu, Ştefan Olaru
core +6 more sources
A high-performance spatial database based approach for pathology imaging algorithm evaluation
Journal of Pathology Informatics, 2013 Background: Algorithm evaluation provides a means to characterize variability across image analysis algorithms, validate algorithms by comparison with human annotations, combine results from multiple algorithms for performance improvement, and facilitate
Fusheng Wang +10 more
doaj +3 more sources
A spatial database of health facilities managed by the public health sector in sub Saharan Africa. [PDF]
Sci Data, 2019 Health facilities form a central component of health systems, providing curative and preventative services and structured to allow referral through a pyramid of increasingly complex service provision.
Maina J +8 more
europepmc +2 more sources
RiceAtlas, a spatial database of global rice calendars and production. [PDF]
Sci Data, 2017 Knowing where, when, and how much rice is planted and harvested is crucial information for understanding the effects of policy, trade, and global and technological change on food security.
Laborte AG +12 more
europepmc +2 more sources
Tightly-coupled spatial database features in the Odysseus/OpenGIS DBMS for high-performance [PDF]
GeoInformatica, 2009 Conventional object-relational database management system (ORDBMS) vendors provide extension mechanisms for adding user-defined types and functions to their own DBMSs.
Kyu-Young Whang +6 more
openalex +2 more sources
Spatial Indexing of Large Multidimensional Databases [PDF]
arXiv, 2012 Scientific endeavors such as large astronomical surveys generate databases on the terabyte scale. These, usually multidimensional databases must be visualized and mined in order to find interesting objects or to extract meaningful and qualitatively new relationships.
István Csabai +7 more
arxiv +3 more sources
MATCHING FILTER-BASED VSLAM OPTIMIZATION IN INDOOR ENVIRONMENTS [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2023 An important factor that reduced the accuracy of motion trajectories in existing VSLAM (Visual Simultaneous Localization and Mapping) systems is the poor estimation of the position pose of the vision odometer. The existing methods generate many incorrect
S. Wei, S. Wei, S. Wei, S. Wei, S. Wang
doaj +1 more source
Nucleic Acids Research, 2023 Recent technological developments in spatial transcriptomics allow researchers to measure gene expression of cells and their spatial locations at the single-cell level, generating detailed biological insight into biological processes.
Zhicheng Xu +29 more
semanticscholar +1 more source
CONCEPTS AND TECHNOLOGIES FOR A COMPREHENSIVE INFORMATION SYSTEM FOR HISTORICAL RESEARCH AND HERITAGE DOCUMENTATION [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2013 Information systems play an important role in historical research as well as in heritage documentation. As part of a joint research project of the German Archaeological Institute, the Brandenburg University of Technology Cottbus and the Dresden ...
F. Henze +5 more
doaj +1 more source
Method for Establishing a Spatial Database of Traffic Signs with Machine Learning
Media Komunikasi Teknik Sipil, 2023 Traffic signs are part of road equipment whose existence is very important, in addition to functioning as warnings, prohibitions, orders, or instructions for road users, traffic signs are also a means to reduce accidents and regulate driver behavior ...
Nindyo Cahyo Kresnanto +1 more
doaj +1 more source