GEO/SQL v vodnem gospodarstvu

GeoSQL: A Spatial Query Language of Object-oriented GIS

This article analyzes the definition of spatial query and the requirements of query languages in GIS, and discusses the grammar structures, spatial predicates of GeoSQL, the query language of a prototype objectoriented GIS, YH-GIS. In the last part, some query instances of GeoSQL are presented.

GeoSQL: A Sketch-Based Query Language for Geographical Data

Drawing is a simple, common, and expressive way to represent concepts and relationships for geographical databases. However, the possibility to revise the sketch and multiple interpretations of different shapes and their relationships in the sketch makes very difficult to determine the correct interpretation of the user goals. This paper starts from the assumption that the sketched picture is g...

GeoSQL+: Um Aplicativo Online de Apoio ao Aprendizado de SQL com Extensões Espaciais

Many tools focused on learning the SQL language are available online. None of them, however, focus on spatially extended databases, in which queries can involve geometric representations, topological functions, and distance calculations. This paper describes GeoSQL+, an online tool that allows posting SQL queries to a geographic database manager and visualizing the results as tables and maps. V...

Sectional Anatomy Quiz - V

In this series a pictorial quiz pertaining to identification of normal anatomical structures and landmarks at a given level on the computed tomography (CT) is presented. An image depicting normal anatomy is followed by a series of images showing different pathologies. Readers are expected to identify and appreciate variation and changes in the normal anatomy in presence of a given pathology. Th...

Padmakar V Khadikar-Curriculum Vitae