engleski

Comparison of different language paradigms for modeling geospatial data

The INSPIRE Directive requires that EU member states adjust their spatial data systems in a way that will allow unifying them in interoperable geospatial web services and standardized transfer formats. European data models, called INSPIRE Data Specifications, are defined for important topics as a final goal of transformation. The capability to communicate and transfer data, called interoperability, is needed to ensure successful spatial data exchange between two or more different information systems. To achieve that interoperability, one main aspect must be fulfilled: to specify system independent data structure. The formal description of this data structure and content is provided by an application schema. According to the ISO 19100 series of geographic information standards, UML (Unified Modeling Language) and GML (Geography Markup Language) are formal languages recommended to describe an application schema. UML is an object-oriented language used for spatial data modeling, while GML uses the XML syntax to express geographical features including features, coordinate reference systems, geometry, topology, time, units of measure etc. The transformation from UML application schema to the GML application schema (according to ISO 19109 ) is based on a set of encoding rules that are presented and explained in this thesis.

language paradigm; ISO standard; UML; GML; FME; General Feature Model

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