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This work is issued upon awareness of the weakness of present DBMS in supporting CIS* which may be viewed as a further step to the compromise of database principles and 6IS requirements.Qireing Chen
(4) Data edge matching: projection transformation was carried out on the geological map database, and was firstly matched with the given theoretical framework after being transformed to a geographical coordinate system, before edge matching with the adjacent map-sheet. The specific steps are as foll...
OLE automation PolyBase Policy-Based Management Query Store Replication Security Snapshot Backup Azure Synapse Link for SQL SQL Server Agent Extended Events SQL Server Profiler Stretch Database Extended Temporal tables XML System tables Transact-SQL (T-SQL) Reference xQuery T...
The annual precipitation of the city in the Lushan earthquake affected area is about 1800 mm (China Meteorological Data Sharing Service System, http://cdc.cma.gov.cn). The affected area has a subtropical humid monsoonal climate with quite dense vegetation cover. 3. Data and methods 3.1. ...
Several major database systems provide extensions to support the management and analysis of spatial data in a relational database system (IBM02, Ora01 and
Constraint databases have recently been proposed as a powerful framework to model and retrieve spatial data. In a constraint database, a spatial object is represented as a quantifier free conjunction of (usually linear) constraints, called generalized tu
Attaining high crop yields and increasing carbon storage in agricultural soils, while avoiding negative environmental impacts on water quality, soil erosion, and biodiversity, requires accurate and precise management of crop inputs and management practic
基于OracleSpatial的地质空间数据管理系统的研究与实现_李丰丹 图1基于空间数据库的空间数据存储模型 1.3空间数据索引机制 空间索引是缩短搜索路径的方法，索 引数据是由基于几何体的空间数据生成 的,是一种逻辑性索引。其作用包括：窗 口查询，在索引过的数据空间中找到与给 定点或区域有相互作用的对象；空间连 结...
Data sources include data from the Defense Health Agency, the National Plan and Provider Enumeration System National Provider Identifier data, the US Census, American Community Survey, and the Social Determinants of Health Database.17 We used a web-based query18 to derive a database of driving ...